Papers by International Journal of Advances in Chemistry (IJAC)
The organophosphorus class of compounds has several usages nowadays. Some halogenated organophosp... more The organophosphorus class of compounds has several usages nowadays. Some halogenated organophosphorus are used as flame retardants, and others are used as pesticides worldwide. In the last case, those compounds are subject to law regulation. They are now used as chemical weapons in many wars and terrorist attacks. Due to this variety of usages and the high toxicity of such compounds, the study of the proper treatment for residues containing those substances is significant to prevent the degradation of soil, water, and the atmosphere. For these reasons, the present study conducted numeric simulations of the incineration of organophosphorus compounds using kinetic models of combustion and pyrolysis found in the literature. The study of the degradation of this class of substances and the pollutant formation was made by simulating a homogeneous zeroth-order reactor and a continuous stirred tank reactor model. Due to the results of the simulations, the degradation made with the batch mode operation is efficient in the degradation of the substances considered in this work. The stream-containing process products have CO2, CO, HF, HOPO, and HOPO2. The three last cited have no determination about the emission ranges in the legislation, but their concentrations indicate the necessity of treatment for them. Furthermore, it was possible to evaluate the negative influence of the hydrocarbon used as fuel and the presence of CO2 in the degradation of the organophosphate compounds.
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International Journal of Advances in Chemistry (IJAC) is a peer-reviewed, open access journal, ad... more International Journal of Advances in Chemistry (IJAC) is a peer-reviewed, open access journal, addresses the impacts and challenges of Chemistry. The journal documents practicaland theoretical results which make a fundamental contribution for the development ofChemistry.
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With increasing industrialization, rapid economic development, and an ever-growing population, th... more With increasing industrialization, rapid economic development, and an ever-growing population, the problem of water pollution and water scarcity is increasing at an alarming rate. It is estimated that more than 800,000 annual diarrheal deaths are attributed to unsafe water usage. Furthermore, traditional wastewater treatment technologies, such as adsorption, chlorination, and biochemical methods are difficult to utilize for treating wastewater at low concentration for they lead to high toxicity. However, Nano TiO2-based photocatalytic technology is a new highefficiency and energy-saving alternative because NanoTiO2 can degrade organic pollutants into non-toxic compounds such as CO2 and H2O under the sunlight. Nonetheless, separating and recycling Nano TiO2 from water remains to be a huge challenge. Therefore, we prepared PVA-Nano TiO2 foam at high speed stirring, film laying, drying, and thermal crosslinking to embed in PVA for reuse and recycle. The morphology, structure, and photocatalytic performance of PVA-Nano TiO2 foam were characterized in detail by SEM, TGA, FTIR, UV-Vis, and so on. The results show the cell size of the foam is about 0.2-0.5 mm, and the swelling degree of PVA-Nano TiO2 foam is about 600%. The TiO2 nanoparticles also have no effect on thermal crosslinking of PVA. Under sunlight, the PVA-Nano TiO2 foam possesses photocatalytic activity that is higher than that of non-porous PVANano TiO2 film due to the higher permeability of water and impurity with higher porosity. In addition, the PVANano TiO2 foam exhibits good reusability under multi-cycle use. Thus, this novel design of PVA-Nano TiO2 foam is simple, eco-friendly, and effective with potential practical application value.
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Pollution resulting from unsustainable agricultural and urbanization activities in the Ruhezamyen... more Pollution resulting from unsustainable agricultural and urbanization activities in the Ruhezamyenda and Bunyonyi catchments are threatening lake Bunyonyi. These have led to high chemical oxygen demand (COD), electrical conductivity, turbidity, pH, iron (II) concentration and low dissolved oxygen (DO5). In this study we have investigated the how COD, turbidity, pH, concentration of iron, total suspended solids, total nutrients and DO5 of water changed with distance in lake. Water sampled from different distances in the lake filtered using Whatman paper at ambient temperatures was tested for COD, electrical conductivity, turbidity, total nutrients, iron, hardness and DO5. COD was 20.
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Water quality is a significant criterion in matching water demand and supply. Securing adequate f... more Water quality is a significant criterion in matching water demand and supply. Securing adequate freshwater quality for both human and ecological needs is thus an important aspect of integrated environmental management and sustainable development. To represent water quality in a lucid way different water quality indices for water quality assessment are used which aim at giving a single value to the water quality of a source reducing great amount of parameters into a simpler expression and enabling easy interpretation of monitoring data. In this review, various water quality indices (WQI) used for assessing surface water quality are discussed. As different National and International Agencies involved in water quality assessment and pollution control defines water quality criteria for different uses of water considering different indicator parameters, so there are numerous WQI specific to any region or area. An attempt to cover different water quality indices developed worldwide, their background and application area has been discussed here.
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International Journal of Advances in Chemistry (IJAC) is a peer-reviewed, open access journal, ad... more International Journal of Advances in Chemistry (IJAC) is a peer-reviewed, open access journal, addresses the impacts and challenges of Chemistry. The journal documents practical and theoretical results which make a fundamental contribution for the development of Chemistry.
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International Journal of Advances in Chemistry (IJAC) is a peer-reviewed, open access journal, ad... more International Journal of Advances in Chemistry (IJAC) is a peer-reviewed, open access journal, addresses the impacts and challenges of Chemistry. The journal documents practical and theoretical results which make a fundamental contribution for the development of Chemistry.
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6 th International Conference on Chemical Engineering (Cheme 2022) will provide an excellent int... more 6 th International Conference on Chemical Engineering (Cheme 2022) will provide an excellent international forum for sharing knowledge and results in theory, methodology and applications impacts and challenges of Chemical Engineering. The conference documents practical and theoretical results which make a fundamental contribution for the development of Chemical Engineering. The aim of the conference is to provide a platform to the researchers and practitioners from both academia as well as industry to meet and share cutting-edge development in the field. Original research papers, state-of-the-art reviews are invited for publication in all areas Chemical Engineering.
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International Journal of Advances in Chemistry (IJAC) is a peer-reviewed, open access journal, ad... more International Journal of Advances in Chemistry (IJAC) is a peer-reviewed, open access journal, addresses the impacts and challenges of Chemistry. The journal documents practical and theoretical results which make a fundamental contribution for the development of Chemistry.
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Scope 5 th International Conference on Chemical Engineering (CHEME 2021) will provide an excellen... more Scope 5 th International Conference on Chemical Engineering (CHEME 2021) will provide an excellent international forum for sharing knowledge and results in theory, methodology and applications impacts and challenges of Chemical Engineering. The conference documents practical and theoretical results which make a fundamental contribution for the development of Chemical Engineering. The aim of the conference is to provide a platform to the researchers and practitioners from both academia as well as industry to meet and share cutting-edge development in the field. Original research papers, state-of-the-art reviews are invited for publication in all areas Chemical Engineering.Authors are solicited to contribute to the conference by submitting articles that illustrate research results, projects, surveying works and industrial experiences that describe significant advances in the following areas, but are not limited to.
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With increasing industrialization, rapid economic development, and an ever-growing population, th... more With increasing industrialization, rapid economic development, and an ever-growing population, the problem of water pollution and water scarcity is increasing at an alarming rate. It is estimated that more than 800,000 annual diarrheal deaths are attributed to unsafe water usage. Furthermore, traditional wastewater treatment technologies, such as adsorption, chlorination, and biochemical methods are difficult to utilize for treating wastewater at low concentration for they lead to high toxicity. However, Nano TiO2-based photocatalytic technology is a new high-efficiency and energy-saving alternative because NanoTiO2 can degrade organic pollutants into non-toxic compounds such as CO2 and H2O under the sunlight. Nonetheless, separating and recycling Nano TiO2 from water remains to be a huge challenge. Therefore, we prepared PVA-Nano TiO2 foam at high speed stirring, film laying, drying, and thermal crosslinking to embed in PVA for reuse and recycle. The morphology, structure, and photocatalytic performance of PVA-Nano TiO2 foam were characterized in detail by SEM, TGA, FTIR, UV-Vis, and so on. The results show the cell size of the foam is about 0.2-0.5 mm, and the swelling degree of PVA-Nano TiO2 foam is about 600%. The TiO2 nanoparticles also have no effect on thermal crosslinking of PVA. Under sunlight, the PVA-Nano TiO2 foam possesses photocatalytic activity that is higher than that of non-porous PVA-Nano TiO2 film due to the higher permeability of water and impurity with higher porosity. In addition, the PVA-Nano TiO2 foam exhibits good reusability under multi-cycle use. Thus, this novel design of PVA-Nano TiO2 foam is simple, eco-friendly, and effective with potential practical application value.
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The most important factor in the decision to adopt mobile systems is user perception of their val... more The most important factor in the decision to adopt mobile systems is user perception of their value. However, behavioral theory suggests that context affects user attitude and therefore influences acceptance. We therefore hypothesized that the benefits of mobile systems should be evaluated against users' contextual needs and that reduced dependence on time and place required providing service at any time and place needed by the user. Mental costs or costs of learning to use the system, however, may not be evaluated in the same way, because system use and learning about it are acts with different contexts. Our findings advance knowledge of IT adoption and suggest that we should start to identify the contexts of both the benefits of use and in learning to use the system.
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IJAC, 2021
International Journal of Advances in Chemistry (IJAC) is a peer-reviewed, open access journal, ad... more International Journal of Advances in Chemistry (IJAC) is a peer-reviewed, open access journal, addresses the impacts and challenges of Chemistry. The journal documents practical and theoretical results which make a fundamental contribution for the development of Chemistry.
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NICKEL HYDROXIDE FILMS IN CONTACT WITH AN ELECTROACTIVE SOLUTION. A STUDY EMPLOYING ELECTROCHEMICAL IMPEDANCE MEASUREMENTS, 2016
The deactivation of nickel hydroxide films after prolonged storage times without use was studied.... more The deactivation of nickel hydroxide films after prolonged storage times without use was studied. This study was carried out in the context of the Rotating Disc Electrode Voltammetry (RDEV) and Electrochemical Impedance Spectroscopy (EIS) when the nickel hydroxide film contacts an electroactive solution and a redox reaction occurs at the Au-Ni(OH) 2 |electrolyte interface. Deferasirox (4-(3,5-bis(2-hydroxyphenyl)-1,2,4-triazol-1-yl) benzoic acid) was employed as redox species in solution. Limiting currents vs. electrode rotation rate dependences allowed one to obtain variation of the charge transport rate on the storage time. EIS was employed to obtain a more complete series of charge-transport parameters, that is, electron and ion diffusion coefficients and different interfacial resistances related to the gold/nickel hydroxide and nickel hydroxide/solution interfaces. Keywords Nickel hydroxide films; charge transport parameters; ion and electron diffusion coefficients; gold/nickel hydroxide and nickel hydroxide/solution interfacial resistances
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IJAC, 2017
Chemotherapy is the most potent therapy for treatment of tuberculosis. In the chemotherapy of tub... more Chemotherapy is the most potent therapy for treatment of tuberculosis. In the chemotherapy of tuberculosis, resistance associated with treatment failures emerged and has become a common occurrence all around world. The multi-drug therapy is used to prevent the emergence of drug resistance mutants during the long duration of treatment. Resistance can be defined as single-drug, multi-drugs, depending on the number of drugs and/or which drugs are involved. The drug resistance tuberculosis more prevalent, lack the resources to implement adequate measures to control even the susceptible types of the disease. A high prevalence of primary multidrug-resistant tuberculosis, previous treatment for TB predisposes to the selection of multi drug resistance organisms and non-compliance is a major factor in allowing the resistant organisms to survive.
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IJAC, 2017
Chemotherapy is the most potent therapy for treatment of tuberculosis. In the chemotherapy of tub... more Chemotherapy is the most potent therapy for treatment of tuberculosis. In the chemotherapy of tuberculosis, resistance associated with treatment failures emerged and has become a common occurrence all around world. The multi-drug therapy is used to prevent the emergence of drug resistance mutants during the long duration of treatment. Resistance can be defined as single-drug, multi-drugs, depending on the number of drugs and/or which drugs are involved. The drug resistance tuberculosis more prevalent, lack the resources to implement adequate measures to control even the susceptible types of the disease. A high prevalence of primary multidrug-resistant tuberculosis, previous treatment for TB predisposes to the selection of multi drug resistance organisms and non-compliance is a major factor in allowing the resistant organisms to survive.
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International Journal of Advances in Chemistry (IJAC), 2019
The E-51 epoxy resin was modified by PTMG toughener. The resin was cured under high temperature
m... more The E-51 epoxy resin was modified by PTMG toughener. The resin was cured under high temperature
methyl tetrahydrophthalic anhydride (MeTHPA) as Tris(dimethylaminomethyl)phenol (DMP)
shows that PTMG significantly reduced the glass transition temperature of test results shows that the presence of PTMG in the cured material increased maximum impact strength was achieved
modulus, flexural strength, and fle smaller than the valve value, PTMG increased the cured material’s tensile and flexural strength as well as its tensile and flexural modulus. While the mass fraction of PTMG was larger than increase of the mass fraction of PTMG reduced the cured material’s strength and modulus.
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Water quality is a significant criterion in matching water demand and supply. Securing adequate f... more Water quality is a significant criterion in matching water demand and supply. Securing adequate freshwater quality for both human and ecological needs is thus an important aspect of integrated environmental management and sustainable development. To represent water quality in a lucid way different water quality indices for water quality assessment are used which aim at giving a single value to the water quality of a source reducing great amount of parameters into a simpler expression and enabling easy interpretation of monitoring data. In this review, various water quality indices (WQI) used for assessing surface water quality are discussed. As different National and International Agencies involved in water quality assessment and pollution control defines water quality criteria for different uses of water considering different indicator parameters, so there are numerous WQI specific to any region or area. An attempt to cover different water quality indices developed worldwide, their background and application area has been discussed here. 1. INTRODUCTION Water is the prime natural resource. Acknowledging the vital importance of this scarce resource for human and animal life, as well as for maintaining ecological balance for economic and developmental activities of all kinds is a matter of utmost concern.In recent times, there has been a tremendous increase in demand for freshwater and water shortage in arid and semiarid regions due to population increase, urbanization, industrialization, and intense agricultural activities in many parts of world. Due to inadequate supply of surface waters, most of the people are depending mainly on groundwater resources for drinking and domestic, industrial, and irrigation uses. Innumerable large towns and many cities derive water supply from groundwater and surface water for different uses through municipality network and also from large number of private boreholes. Regular water quality monitoring of the water resources are absolutely necessary to assess the quality of water for ecosystem health and hygiene, industrial use, agricultural use and domestic use.Assessment of water quality can be a complex process undertaking multiple parameters capable of causing various stresses on overall water quality [8]. To evaluate water quality from a large number of samples, each containing concentrations for many parameters is difficult [2]. Traditional approaches to assessing water quality are based on the comparison of experimentally determined parameter values with the existing guidelines [19]. So, water quality indices are such approaches which minimises the data volume to a great extent and simplifies the expression of water quality status. Water quality index can be evaluated on the basis of various physical, chemical and bacteriological parameters. Numerous water quality indices have been formulated all over the world which can easily judge out the overall water quality within a particular area promptly and efficiently. For example, US National Sanitation Foundation Water Quality Index (NSFWQI), Canadian Council of Ministers of the Environment Water Quality Index (CCMEWQI), British Columbia Water Quality Index (BCWQI), and Oregon Water Quality Index (OWQI) [1][35][40][63]. These indices are based on the comparison of the water
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Papers by International Journal of Advances in Chemistry (IJAC)
methyl tetrahydrophthalic anhydride (MeTHPA) as Tris(dimethylaminomethyl)phenol (DMP)
shows that PTMG significantly reduced the glass transition temperature of test results shows that the presence of PTMG in the cured material increased maximum impact strength was achieved
modulus, flexural strength, and fle smaller than the valve value, PTMG increased the cured material’s tensile and flexural strength as well as its tensile and flexural modulus. While the mass fraction of PTMG was larger than increase of the mass fraction of PTMG reduced the cured material’s strength and modulus.
methyl tetrahydrophthalic anhydride (MeTHPA) as Tris(dimethylaminomethyl)phenol (DMP)
shows that PTMG significantly reduced the glass transition temperature of test results shows that the presence of PTMG in the cured material increased maximum impact strength was achieved
modulus, flexural strength, and fle smaller than the valve value, PTMG increased the cured material’s tensile and flexural strength as well as its tensile and flexural modulus. While the mass fraction of PTMG was larger than increase of the mass fraction of PTMG reduced the cured material’s strength and modulus.
will provide an excellent international forum for sharing knowledge and new research results in
all areas of Chemistry & Chemical Engineering. The goal of this conference is to bring together
researchers and practitioners from academia and industry to focus on areas of Chemistry &
Chemical Engineering for a cross cultural exploration and subsequent innovation of subjects
concerned and establishing new collaborations in these areas. Authors are solicited to contribute
to this conference by submitting articles for the development of Chemistry & Chemical
Engineering.