- College of engineering, building A13,
- 0133331682
Omer Aga
Imam Abdulrahman bin Faisal University, Environmental Engineering, Faculty Member
Catalysis has manifested its role as a fundamental tool in pollution prevention. While catalysis has long been utilized in increasing efficiency, yield, and selectivity, it is now also recognized as accomplishing a wide range of green... more
Catalysis has manifested its role as a fundamental tool in pollution prevention. While catalysis has long been utilized in increasing efficiency, yield, and selectivity, it is now also recognized as accomplishing a wide range of green chemistry goals. Air pollutants produced by industrial and man-made emissions possesses a unique property that it could affect regional and global receptors. Measuring and defining the levels of pollutants and its sources whether it is local, regional or global should precede the precautions and measures that should be taken to reduce the levels of a particular pollutant. In this article the air quality at the Black Sea region of Turkey is being discussed. Moreover, it endeavors to locate the possible sources of the different pollutants at local, regional and long range transported scales. About 196 rainwater samples were collected over the Black Sea region of Amasra between 1995-1999 and analyzed for major and trace ions. Although statistical tools do...
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A web-based tool AirPolTool for air pollution prediction and control in Istanbul is developed. It models the relationship between local meteorological data and air pollution indicators concentrations like SO2, PM10 and CO by using neural... more
A web-based tool AirPolTool for air pollution prediction and control in Istanbul is developed. It models the relationship between local meteorological data and air pollution indicators concentrations like SO2, PM10 and CO by using neural networks. AirPolTool presents on the user-friendly website airpol.fatih.edu.tr three-days predictions of air pollution indicators and supports appropriate episode warning signals and the relevant actions to be taken by the government or the public to reduce that particular pollutant to non-harmful level.
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ABSTRACT In this study, different sludge-based adsorbents were synthesised using ZnCl2 (Zn-SBACs) and NaOH (Na-SBACs) under varying experimental conditions and subsequently employed for simultaneous aqueous uptake of phenol, resorcinol,... more
ABSTRACT In this study, different sludge-based adsorbents were synthesised using ZnCl2 (Zn-SBACs) and NaOH (Na-SBACs) under varying experimental conditions and subsequently employed for simultaneous aqueous uptake of phenol, resorcinol, and catechol. Response surface modelling (RSM) technique was employed to evaluate and optimise the collective influences of the SBAC production operating conditions based on adsorptive performances of the produced SBACs. The adsorbent-adsorbate interactive mechanisms were explored through several structural and surface characterisation techniques such as Scanning Electronic Microscopy (SEM), Thermogravimetric Analysis (TGA), Brunauer, Emmett and Teller machine (BET), Fourier Transformed Infrared spectroscopy (FTIR), pKa pHpzc and zeta potentials. These techniques depicted the SBACs as finely granular, thermally stable and mesoporous adsorbents enriched with oxygen functionalities. There existed a higher affinity of the Zn-SBACs towards catechol, then followed by resorcinol with the Na-SBACs yielding lower performance. Respectively, the maximum adsorption capacities of (45.57 mg/g and 42.99 mg/g); (14.19 mg/g and 29.28 mg/g); (20.95 mg/g and 17.82 mg/g) were obtained with higher pronounced effects of chemical–sludge ratio and activation temperature. For the Zn-SBAC, the best operating conditions for combined optimisation of the phenolic compounds’ removal were obtained at 615°C, 1.06 ZnCl2-sludge ratio and 86.74-min activation time that yielded 100%, 57% and 80% for catechol, phenol, and resorcinol, respectively. The adsorption mechanism insight taken into cognisance FTIR, pKa, isoelectric point, zeta potential, and the phenolics-SBAC-adsorbent surface charge interactions suggest the interplay of chemisorption involving strong surface electrostatic attraction. The high performance of the SBACs under three cycles of regeneration affirmed the economic potentials of the usability of the SBACs for the treatment of phenolic wastewater. This study establishes the aptness of creating optimal conditions for SBACs production through the evaluation of the performance of simultaneous removal of multi-solute pollutants from an aqueous phase.
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Background: Recently (in 2018), females were legally allowed to drive and use automobiles in Saudi Arabia (SA) for the first time. This study investigated and analyzed the general fear of driving (GFDS), perceived self-confidence (PSCR),... more
Background: Recently (in 2018), females were legally allowed to drive and use automobiles in Saudi Arabia (SA) for the first time. This study investigated and analyzed the general fear of driving (GFDS), perceived self-confidence (PSCR), socio-economic variables, demographic distribution, and self-reported RTCs in novice female drivers from SA. Methods: The work was based on survey responses from 9608 participants from the first generation of female drivers from SA. Factor analysis was used to extract GFDS and PSCR scales. Results: Cronbach’s α values of 0.781 and 0.800 were observed for GFDS and PSCR, respectively. Logistic regression was employed to model road traffic collisions (RTCs) as a function of all significant variables. The results showed that of the 17.4% of geographically distributed respondents who reported RTCs, only 4% reported severe or minor injuries, and the rest (96.0%) of the accidents involved property damage. The GFDS and PSCR values showed a positive associat...
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The current research aimed to produce anhydrous gel organic electrolytes with superior performance for high-temperature supercapacitor applications. Within this scope, anhydrous electrolytes were designed by the termination of... more
The current research aimed to produce anhydrous gel organic electrolytes with superior performance for high-temperature supercapacitor applications. Within this scope, anhydrous electrolytes were designed by the termination of 1,4-butanediol diglycidyl ether (BDE] with 5-aminotetrazole (AT). The BDE(AT]2 was further doped with phosphoric acid (PA] and l-Ethyl-3-methylimidazolium tetra-fluoroborate (EMT, as an ionic liquid] at varied ratios. The structure of fabricated electrolytes was elucidated with various spectroscopic techniques, and thermal studies confirmed high thermal stabilities and low glass transition temperatures, suggesting that they could be used in a wide temperature range. Different supercapacitor systems, in combination with carbon-based electrodes and BDE(AT)2, BDE(AT)2-0.1EMT, and BDE(AT)2-PA-0.1EMT electrolytes, were constructed. The supercapacitor device in combination with BDE(AT)2-PA-0.1EMT electrolyte, showed the highest ionic conductivity value of 1.2×10−4 S cm−1. The electrode/electrolyte combination demonstrated a maximum specific capacitance (80.4 F g−1), the highest specific energy (2.91 Wh kg−1), and highly effective electrochemical reversibility (up to 2.250 cycles). The supercapacitor device illustrated a better performance at higher temperatures in terms of its specific capacitance value.
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Black carbon (BC) particles being emitted from mobile and stationary emission sources as a result of combustion activities have significant impacts on human health and climate change. A lot of social activities have been halted during the... more
Black carbon (BC) particles being emitted from mobile and stationary emission sources as a result of combustion activities have significant impacts on human health and climate change. A lot of social activities have been halted during the COVID-19 lockdowns, which has evidently enhanced the ambient and indoor air quality. This paper investigates the possible emission sources and evaluates the meteorological conditions that may affect the dispersion and transport of BC locally and regionally. Ground-level equivalent BC (eBC) measurements were performed between January 2020 and July 2020 at a university campus located in Dammam city of the Kingdom of Saudi Arabia (KSA). The fossil fuel (eBCff) and biomass burning (eBCbb) fractions of total eBC (eBCt) concentrations were estimated as 84% and 16%, respectively, during the entire study period. The mean eBCbb, eBCff, and eBCt concentrations during the lockdown reduced by 14%, 24%, and 23%, respectively. The results of statistical analyses...
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Sources of contamination in a subsurface environment are petrol, diesel fuel, gasoline at oil refineries, underground storage tanks, transmission pipelines, and different industries. The permeable reactive barrier (PRB) is a promising... more
Sources of contamination in a subsurface environment are petrol, diesel fuel, gasoline at oil refineries, underground storage tanks, transmission pipelines, and different industries. The permeable reactive barrier (PRB) is a promising technology to remediate groundwater in-situ. In this study, synthetic groundwater samples containing toluene are treated in three reactor columns by biological processes. PRB-1 consisted of sand and gravel as reactor media, microbial inoculum (bioaugmentation—BA), and nutrients (biostimulation—BS); PRB-2 consisted of sand and gravel as reactor media, microbial inoculum, nutrients, and 12 layers of nonwoven geotextile fabrics; and PRB-3 consisted of only sand and gravel as reactor media (natural attenuation—NA). This study was conducted to assess the impact of geotextile fabric filter, bioaugmentation, and biostimulation on toluene degradation efficiency. After 167 days of treatment, toluene biodegradation efficiencies varied between 88.2% and 93.8% for...
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This experimental work focused on the synthesis, characterization, and testing of a unique, magnetically separable, and eco-friendly adsorbent composite material for the advanced treatment and efficient removal of nitrate and phosphate... more
This experimental work focused on the synthesis, characterization, and testing of a unique, magnetically separable, and eco-friendly adsorbent composite material for the advanced treatment and efficient removal of nitrate and phosphate pollutants from wastewater. The MgAl-augmented double-layered hydroxide (Mg-Fe/LDH) intercalated with sludge-based activated carbon (SBAC-MgFe) composites were characterized by FT-IR, XRD, BET, VSM, SEM, and TEM techniques, revealing homogeneous and efficient dispersion of MgFe/LDH within the activated carbon (AC) matrix, a highly mesoporous structure, and superparamagnetic characteristics. The initial solution pH, adsorbent dose, contact time, and temperature parameters were optimized in order to reach the best removal performance for both pollutants. The maximum adsorption capacities of phosphate and nitrate were found to be 110 and 54.5 mg/g, respectively. The competition between phosphate and coexisting ions (Cl−, CO32−, and SO42−) was studied and...
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In the last two decades, the application of microwave heating to the processing of materials has to become increasingly widespread. Microwave-assisted foaming processes show promise for industrial commercialization due to the potential... more
In the last two decades, the application of microwave heating to the processing of materials has to become increasingly widespread. Microwave-assisted foaming processes show promise for industrial commercialization due to the potential advantages that microwaves have shown compared to conventional methods. These include reducing process time, improved energy efficiency, solvent-free foaming, reduced processing steps, and improved product quality. However, the interaction of microwave energy with foaming materials, the effects of critical processing factors on microwave foaming behavior, and the foamed product’s final properties are still not well-explored. This article reviews the mechanism and principles of microwave foaming of different materials. The article critically evaluates the impact of influential foaming parameters such as blowing agent, viscosity, precursor properties, microwave conditions, additives, and filler on the interaction of microwave, foaming material, physical...
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Mathematical modeling has become an indispensable tool for sustainable wastewater management, especially for the simulation of complex biochemical processes involved in the activated sludge process (ASP), which requires a substantial... more
Mathematical modeling has become an indispensable tool for sustainable wastewater management, especially for the simulation of complex biochemical processes involved in the activated sludge process (ASP), which requires a substantial amount of data related to wastewater and sludge characteristics as well as process kinetics and stoichiometry. In this study, a systematic approach for calibration of the activated sludge model one (ASM1) model for a real municipal wastewater ASP was undertaken in GPS-X. The developed model was successfully validated while meeting the assumption of the model’s constant stoichiometry and kinetic coefficients for any plant influent compositions. The influences of vital ASP parameters on the treatment plant performance and capacity analysis for meeting local discharge limits were also investigated. Lower influent chemical oxygen demand in mgO2/L (COD) could inhibit effective nitrification and denitrification, while beyond 250 mgO2/L, there is a tendency fo...
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The present study investigates the performance of a pilot-scale Sequencing Batch Reactor (SBR) process for the treatment of wastewater quality parameters, including turbidity, total suspended solids (TSS), total solids (TS), nitrogen... more
The present study investigates the performance of a pilot-scale Sequencing Batch Reactor (SBR) process for the treatment of wastewater quality parameters, including turbidity, total suspended solids (TSS), total solids (TS), nitrogen (ammonia (NH3–N), nitrite (NO2−), and nitrate (NO3−), phosphate (PO43−), the chemical oxygen demand (COD), and the 5-day biological oxygen demand (BOD5), from municipal wastewater. Two scenarios, namely, pre-anoxic denitrification and post-anoxic denitrification, were investigated to examine the performance of a pilot-scale SBR on the wastewater quality parameters, particularly the nitrogen removal. The correlation statistic was applied to explain the effects of operational parameters on the performance of the SBR system. The results revealed that the post-anoxic denitrification scenario was more efficient for higher qualify effluent than the first scenario. The effluent concentrations of the targeted wastewater quality parameters obtained for the propo...
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This work reports the synthesis of new layered double hydroxide (LDH) composites using sewage-based ZnCl2-activated carbon (AC) intercalated with MgFe (AC-MgFe-LDH) and an evaluation of their adsorptive performance for phenol removal from... more
This work reports the synthesis of new layered double hydroxide (LDH) composites using sewage-based ZnCl2-activated carbon (AC) intercalated with MgFe (AC-MgFe-LDH) and an evaluation of their adsorptive performance for phenol removal from water. The effect of the AC loading on the final properties of synthesized composites was investigated via various characterization techniques. The results showed efficient decoration at 0.1–0.25 g AC loading within the layers of AC–MgFe composites LDH, which was reflected in the higher surface area (233.75 m2/g) and surface functionalities (OH, NO3, C-O-C, and MMO) yielding a significant improvement of the phenol removal efficiency. However, at higher contents, AC loading led to the breakage of the LDH structure and agglomeration, as indicated by the deterioration in the textural and structural properties. The isotherm and kinetic data were well fitted by the Langmuir and pseudo-second-order model, respectively, with a maximum obtained monolayer a...
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The development of adsorbents with high adsorption capacity and fast separation is of utmost importance for the environmental management of dye-bearing wastewaters. Within this scope, crosslinked hydrogels including poly(vinylphosphonic... more
The development of adsorbents with high adsorption capacity and fast separation is of utmost importance for the environmental management of dye-bearing wastewaters. Within this scope, crosslinked hydrogels including poly(vinylphosphonic acid) (PVPA) and bis[2-(methacryloyloxy)ethyl] phosphate (BMEP) were designed with varying mole ratios of BMEP (5–40%). The Fourier transform infrared (FT-IR) spectroscopy, thermogravimetric analysis (TGA), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and Brunauer-Emmett-Teller (BET) results revealed that the fabrication of crosslinked PVPA-BMEP hydrogels enhanced: (i) functionalities of PA groups in the structure of hydrogels, (ii) thermal stabilities up to 250 °C, and (iii) interaction between methylene blue (MB) molecules and hydrogels. The pseudo second-order kinetic model best described the experimental adsorption data. The behaviors of the isotherms were more appropriate for Langmuir than Freundlich isotherm for t...
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Abstract A decisive and essential unit of supercapacitors is the electrolyte which has utmost importance to assemble high performance, low cost and flexible devices. Here in we report on supercapacitor application of doped 1,2,4-Triazole... more
Abstract A decisive and essential unit of supercapacitors is the electrolyte which has utmost importance to assemble high performance, low cost and flexible devices. Here in we report on supercapacitor application of doped 1,2,4-Triazole (Tri) terminated 1,4-butanediol diglycidyl ether (BG) as a novel anhydrous electrolyte. The triazole terminated BG that is BG (Tri)2 was synthesized and then doped with phosphoric acid and ionic liquid at various fractions. The structure of the pristine and anhydrous gel electrolytes was elucidated with several spectroscopic techniques. The results showed that anhydrous gel electrolytes bear desired properties such as high conductivity and stability for high temperature applications. Galvanostatic charge-discharge (CD), cyclic voltammetry (CV), and electrochemical impedance spectroscopy (EIS) techniques were employed to investigate electrochemical performances of the capacitor devices. The system with the BG (Tri)2/H3PO4/0.1IL electrolyte has a maximum specific capacitance (Cs) of 147 F g−1. The same electrolyte illustrated the highest energy density of 10.2 Wh kg−1 at the power density of 500 W kg−1. The supercapacitor with anhydrous electrolyte exhibited superior performance and efficiency even after 2000 charge/discharge cycles by keeping 10% of its original capacitance. The Cs of supercapacitor including BG(Tri)2/H3PO4/0.1IL increased up to 271 F g−1 as the temperature increased from 25 °C to 75 °C.
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In this study, various source apportionment methods, viz., enrichment factor, relative source contribution, and factor analysis in addition to cluster analysis coupled with satellite observations, were used to investigate the origin of... more
In this study, various source apportionment methods, viz., enrichment factor, relative source contribution, and factor analysis in addition to cluster analysis coupled with satellite observations, were used to investigate the origin of rainwater pollutants in an arid urban area of Saudi Arabia. The rainwater samples were collected by an automatic wet-only sequential rain sampler and analyzed for their pH, electrical conductivity (EC), and major ions (Cl–, NO3, SO4, HCO3, Na+, K+, NH4, Ca2+, and Mg2+). The results revealed that the chemical composition was dominated by Ca2+, SO4, Cl–, HCO3, and Na+, which represented 80% of the total ionic equivalent concentration. Ca2+, the most abundant ion, exhibited a mean concentration of 480 μeq L–1 and accounted for 30% of the total ionic equivalent concentration. The study area received a total ionic wet deposition flux (FWD) of 4.07 tons km–2 y–1, and SO4 and NO3 contributed 76% and 24%, respectively, of the rainwater acidity. Ca2+ was responsible for 80% of the rainwater’s neutralization. The source apportionment indicated that intense local human activity and mediumto long-range transport from Kuwait, Iraq, Qatar, Riyadh, and the Western Province produced the majority of the anthropogenic components (SO4, NO3, and NH4), which represented 47% of the total ionic FWD. However, moderate to high particulate matter loads over the southern part of Saudi Arabia and long-range transport from Iraq and Kuwait contributed the crustal components (Ca2+, HCO3, K+, and Mg2+), which accounted for 36% of the total ionic FWD, whereas the Arabian Gulf was the primary source of the marine components (Na+ and Cl–). We found combining satellite observations and cluster analysis of backward air mass trajectories to be an effective new approach for assessing the source-receptor relationships for atmospheric air pollutants.
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The chemical composition and long-range transportation (LRT) of rain events were assessed in this study. For this purpose, a fully automated wet-only sequential sampler was used to differentiate between washout and rainout processes. The... more
The chemical composition and long-range transportation (LRT) of rain events were assessed in this study. For this purpose, a fully automated wet-only sequential sampler was used to differentiate between washout and rainout processes. The chemical composition of elements (Al, As, Ca, Cd, Co, Cr, Cu, Fe, K, Mg, Mn, Na, Ni, Pb, V, and Zn) and ions (F−, Cl−, NO3−, SO4−2, and NH4+) were quantified in 172 rainwater samples. Cluster analysis (CA) statistical approach was used to classify the back trajectories of the rain events. The CA revealed a seven-cluster solution which provided better explanations for the effects of possible source regions on the receptor site. Consequently, principal component analysis (PCA) was conducted on the normalized cluster-based mean concentrations of the chemical species in order to statistically identify the similarities among the clusters. In conclusion, there were four main sources which strongly affected the chemical composition of precipitation in the study area namely: (i) anthropogenic pollutants from Southwestern and Eastern Europe, (ii) Saharan dust intrusion from Northern Africa, (iii) resuspension of crustal material from nearby regions, and (iv) marine aerosols from Mediterranean and the Black Sea. The proposed methodology combining trajectory cluster analysis, chemical analysis, and principal component analysis was satisfactory to identify the source regions of the trajectories carrying the observed pollutants to the study area.
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Catalysis has manifested its role as a fundamental tool in pollution prevention. While catalysis has long been utilized in increasing efficiency, yield, and selectivity, it is now also recognized as accomplishing a wide range of green... more
Catalysis has manifested its role as a fundamental tool in pollution prevention. While catalysis has long been utilized in increasing efficiency, yield, and selectivity, it is now also recognized as accomplishing a wide range of green chemistry goals. Air pollutants produced by industrial and man-made emissions possesses a unique property that it could affect regional and global receptors. Measuring and defining the levels of pollutants and its sources whether it is local, regional or global should precede the precautions and measures that should be taken to reduce the levels of a particular pollutant. In this article the air quality at the Black Sea region of Turkey is being discussed. Moreover, it endeavors to locate the possible sources of the different pollutants at local, regional and long range transported scales. About 196 rainwater samples were collected over the Black Sea region of Amasra between 1995-1999 and analyzed for major and trace ions. Although statistical tools do...
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This paper suggests a method by which a governmental agency can use short term traffic forecasting and air pollution modeling techniques to predict air pollution (i.e., CO, NOx, particulate matter) for major corridors for one or two days... more
This paper suggests a method by which a governmental agency can use short term traffic forecasting and air pollution modeling techniques to predict air pollution (i.e., CO, NOx, particulate matter) for major corridors for one or two days in advance to provide a simple advisory system for decision-makers and the public. The authors propose the use of a Geographic Information System (GIS) integrated with a travel demand and an air pollution dispersal model. This system will first be tested on a corridor in Istanbul, Turkey. After the model has been tested for this corridor, the authors would discern how it could apply it for the major corridors in Istanbul. It is thought that this system will be a very useful device for decision-makers to warn the public about possible health hazards, but also to view alternatives to mitigate the effect of traffic pollution. The public, in turn, could lessen the situation by choosing alternative routes in predicted areas of high pollution or using pub...
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ABSTRACT Current–voltage (I–V) characteristics of MgB2 bulk sintered superconductor, prepared from the commercially available powder (Alfa-Aesar), have been investigated before and after several γ irradiations up to 5000 MR. A minor... more
ABSTRACT Current–voltage (I–V) characteristics of MgB2 bulk sintered superconductor, prepared from the commercially available powder (Alfa-Aesar), have been investigated before and after several γ irradiations up to 5000 MR. A minor increase in the normal state resistance of the sample was observed up to 5000 MR without any change in its critical temperature (T c ). I–V characteristics before and after γ irradiation with different doses up to 5000 MR were shown and fitted to the expression V∝I β(T,B) where β approaches unity near T c before and after γ irradiation. A decrease in the critical currents (I c ) with γ irradiation up to 1000 MR was observed; after which they start to increase with higher irradiations up to 5000 MR without exceeding the critical currents before irradiation.
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Fouling behavior under reburn conditions was investigated with cattle wastes (termed as feedlot biomass [FB]) and coal as reburn fuels under a transient condition and short-time operation. A small-scale (30 kW or 100,000 Btu/hr) boiler... more
Fouling behavior under reburn conditions was investigated with cattle wastes (termed as feedlot biomass [FB]) and coal as reburn fuels under a transient condition and short-time operation. A small-scale (30 kW or 100,000 Btu/hr) boiler burner research facility was used for the reburn experiments. The fuels considered for these experiments were natural gas (NG) for the ashless case, pure coal,
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The ozone that initially presents in the previous day’s afternoon mixing layer can remain in the nighttime atmosphere and then be carried over to the next morning. Finally, this ozone can be brought to the ground by downward mixing as... more
The ozone that initially presents in the previous day’s afternoon mixing layer can remain in the nighttime atmosphere and then be carried over to the next morning. Finally, this ozone can be brought to the ground by downward mixing as mixing depth increases during the daytime, thereby increasing surface ozone concentrations. Variation of ozone concentration during each of these periods
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This paper suggests a method by which a governmental agency can use short term traffic forecasting and air pollution modeling techniques to predict air pollution (i.e., CO, NOx, particulate matter) for major corridors for one or two days... more
This paper suggests a method by which a governmental agency can use short term traffic forecasting and air pollution modeling techniques to predict air pollution (i.e., CO, NOx, particulate matter) for major corridors for one or two days in advance to provide a simple advisory system for decision-makers and the public. The authors propose the use of a Geographic Information System (GIS) integrated with a travel demand and an air pollution dispersal model. This system will first be tested on a corridor in Istanbul, Turkey. After the model has been tested for this corridor, the authors would discern how it could apply it for the major corridors in Istanbul. It is thought that this system will be a very useful device for decision-makers to warn the public about possible health hazards, but also to view alternatives to mitigate the effect of traffic pollution. The public, in turn, could lessen the situation by choosing alternative routes in predicted areas of high pollution or using pub...
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A kinetic model for a cycling adsorbent/photocatalyst combination for formaldehyde removal in indoor air (Chin et al. /. Catalysis 2006, 237, 29-37) was previously developed in our lab, demonstrating agreement with labscale batch... more
A kinetic model for a cycling adsorbent/photocatalyst combination for formaldehyde removal in indoor air (Chin et al. /. Catalysis 2006, 237, 29-37) was previously developed in our lab, demonstrating agreement with labscale batch operation data of other researchers (Shiraishi et al. Chem. ...
Research Interests: Engineering, Chemistry, Catalysis, Photochemistry, Environmental Monitoring, and 15 moreFiltration, Medicine, Adsorption, Activated Carbon, Environmental Sciences, Titanium dioxide, Indoor air pollution, First Order Logic, Formaldehyde, Lumping Kinetic Model, Air Pollutants, Indoor air, Emission rate, Rate Constant, and Kinetic model
The release of mercury to the environment is of particular concern because of its volatility, persistence, and tendency to bioaccumulate. The recovery of mercury from end-box exhaust at chlor-alkali facilities is important to prevent... more
The release of mercury to the environment is of particular concern because of its volatility, persistence, and tendency to bioaccumulate. The recovery of mercury from end-box exhaust at chlor-alkali facilities is important to prevent release into the environment and reduce emissions as required by NESHAP (National Emission Standards for Hazardous Air Pollutants). A pilot-scale photocatalytic reactor packed with silica-titania composite (STC) pellets was tested at a chloralkali facility over a 3-month period. This pilot reactor treated up to 10 ft3/min (ACFM) of end-box exhaust and achieved 95% removal. The pilot reactor was able to maintain excellent removal efficiency even with large fluctuations in influent mercury concentration (400-1600 microg/ft3). The STC pellets were regenerated ex situ by regeneration with hydrochloric acid and performed similarly to virgin STC pellets when returned to service. On the basis of these promising results, two full-scale reactors with in situ reg...
Research Interests: Engineering, Titanium, Environmental Pollution, Activated Carbon, Environmental Sciences, and 11 moreMercury, Silica, Cost Analysis, Time Factors, Chemical Industry, Industrial Waste, Conservation of Natural Resources, Environmental Pollutants, Pilot Projects, Silicon Dioxide, and Removal Efficiency
... Teuteberg Dionisis Kehagias Sotirios Tsaftaris Mikko Kolehmainen Monica Wachowicz Evaggelos Kosmidis Gerd ... the publication of the present book, and personally Dr. Evangelos Kosmidis for his ... G. Efthimiou, N. Gounaris, D.... more
... Teuteberg Dionisis Kehagias Sotirios Tsaftaris Mikko Kolehmainen Monica Wachowicz Evaggelos Kosmidis Gerd ... the publication of the present book, and personally Dr. Evangelos Kosmidis for his ... G. Efthimiou, N. Gounaris, D. Vlachogiannis, N. Koziakis, JG Bartzis, G. Nikolaou ...
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Research Interests: Engineering, Carbon Dioxide, Petroleum, Environmental Pollution, Medicine, and 12 moreEnvironmental Sciences, Emission reduction, Vehicle Emissions, Greenhouse Gas Emissions, Alternative Fuel, Environmental Analysis, Greenhouse Gas, Theoretical Models, Ships, Marine Systems, Environmental Pollutants, and Gasoline
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... There are just a few examples around the world in this area. A recently developed web sys-tem at http://airpol.fatih.edu.tr is one such application. ... Atakan Kurta, Ayşe Betül Oktaya, Ferhat Karacab Omar Alaghab and Page 2. 346 A.... more
... There are just a few examples around the world in this area. A recently developed web sys-tem at http://airpol.fatih.edu.tr is one such application. ... Atakan Kurta, Ayşe Betül Oktaya, Ferhat Karacab Omar Alaghab and Page 2. 346 A. Kurt et al. 1. Introduction ...
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This article attempts to put the light on the air quality of the Black Sea region of Turkey. In addition to that, it endeavors to locate the possible sources of the different pollutants at local, regional and long range transported... more
This article attempts to put the light on the air quality of the Black Sea region of Turkey. In addition to that, it endeavors to locate the possible sources of the different pollutants at local, regional and long range transported scales. About 196 rainwater samples were collected over the Black Sea region of Amasra between 1995 and 1999, and analyzed for major ions and trace elements using spectrophotometric techniques. Andersen wet only rain samples were used to collect rain events, where the rain sample was filtered inline using 0.45 μm cellulose acetate filters. Major anions (SO4 2-, NO3 - and Cl-) were determined using ion chromatography, whereas metals (Ca, Mg, Al, Fe, Na, K), werequantified using ICP-AES. This study shows that, the Black Sea region receives different amounts and types of anthropogenic pollutants via long-range transport according to trajectory models. Although the pH of rain water is not considered acidic (pH = 5.21) yet the neutralizing species are lower than other sites around Europe.
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Research Interests: Turkey, Adolescent, Humans, Smoking, Infant, and 4 moreCadmium, Aged, Middle Aged, and Questionnaires
Research Interests: Air Quality, Atmospheric Chemistry, Trace Metals, Turkey, Environmental Monitoring, and 17 moreAir pollution, Acid Rain, Multidisciplinary, Water Supply, Copper, Lead, Drinking Water, Chromium, Zinc, Rain, Nickel, Cadmium, Seasonal variation, Trace Elements, Environmental monitoring and assessment, Toxic Metals, and Enrichment factor
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Page 1. _____ 599 _____ IX. ULUSAL TESİSAT MÜHENDİSLİĞİ KONGRESİ Sempozyum Bildirisi BİR DERLEME ÇALIŞMASI: İÇ ORTAM HAVA KALİTESİNİN MÜZELER VE TARİHİ BİNA ENVANTERİNDE BULUNAN ...
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... 36, Nos. 1/2/3, pp.195203. Biographical notes: Ferhat Karaca received an MSc and a PhD in Environmental Engineering, Yıldız Technical University, Turkey. He has been a Lecturer at Fatih University, Department of Environmental... more
... 36, Nos. 1/2/3, pp.195203. Biographical notes: Ferhat Karaca received an MSc and a PhD in Environmental Engineering, Yıldız Technical University, Turkey. He has been a Lecturer at Fatih University, Department of Environmental Engineering, since 2002. ...
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Abstract The main objective of this study was to develop an Artificial Neural Net-works (ANN) based model, which could be used as a tool for the predic-tion of traffic related PM2.5 and PM10 emissions. In this purpose, about 70 pairs of... more
Abstract The main objective of this study was to develop an Artificial Neural Net-works (ANN) based model, which could be used as a tool for the predic-tion of traffic related PM2.5 and PM10 emissions. In this purpose, about 70 pairs of daily PM2.5 and PM2.5-10 ...
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... Biographical notes: Ferhat Karaca has been a Lecturer at Fatih University's Department of Environmental Engineering since 2002. ... Engineering, Fatih University, Turkey, in 2000 and PhD degree from the Department... more
... Biographical notes: Ferhat Karaca has been a Lecturer at Fatih University's Department of Environmental Engineering since 2002. ... Engineering, Fatih University, Turkey, in 2000 and PhD degree from the Department of Environmental Engineering, Yıldız Technical University ...
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Research Interests: Engineering, Air Quality, Turkey, Environmental Monitoring, Air pollution, and 18 morePublic Health, Power Plant, Seasonality, Environmental Sciences, Coal Mining, Fossil Fuels, Weather, Seasonal variation, Relative Humidity, Particle Size, Time Factors, Ambient Temperature, Particulate Matter, Low Temperature, Seasons, Wind Speed, Air Pollutants, and Urban Area
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... Biographical notes: Ferhat Karaca received his MSc in Department of Environmental Engineering, Fatih University, Turkey. He is a Lecturer at Fatih University, Department of Environmental Engineering since 2002 and currently a Doctoral... more
... Biographical notes: Ferhat Karaca received his MSc in Department of Environmental Engineering, Fatih University, Turkey. He is a Lecturer at Fatih University, Department of Environmental Engineering since 2002 and currently a Doctoral Candidate at the Yildiz Technical ...
