A low-cost waste biomass generated from a food industry, apricot shells, was subjected to alkali ... more A low-cost waste biomass generated from a food industry, apricot shells, was subjected to alkali modification in order to compare morphology, crystalline structure and thermal stability of native and modified biomass, accompanied by their cellulose-rich fractions. The surface morphology and structure of compared samples were analysed by the scanning electron microscopy (SEM) and mercury porosimetry. Furthermore, Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) and thermal analysis (TG/DTA) were applied. The results have shown that after alkaline treatment, inter- and intra-particle porosity in the material rises, resulting in increase of the total surface area. The XRD diffractograms showed that crystallinity index increased together with crystallite size, suggesting that modified sample has more ordered crystalline structure than native sample (also confirmed by the FTIR analysis). Although the cellulose-rich fraction extracted from the alkali-modified sample showed higher thermal stability, the overall thermal analysis revealed that alkali-modified biomass has lower thermal stability than the native sample. This indicates that this type of modification will improve the fuel properties of this lignocellulosic biomass and imply its possible application in energy recovery process. Graphical abstract
DOAJ (DOAJ: Directory of Open Access Journals), Dec 1, 2017
In this work, the design and usage of biosorbents made of apricot shells (Prunus armeniaca L.), N... more In this work, the design and usage of biosorbents made of apricot shells (Prunus armeniaca L.), Na-alginate and bentonite, for heavy metals removal from wastewaters, were investigated. The effect of particle size on the biosorption process, were investigate and the smallest fraction, was immobilized in Na-alginate. Immobilization had a positive effect on the biosorption process, but due to the inhomogeneity of the granules, bentonite was added as a binding agent. The result was increase of Cu(II) and Zn(II) removal up to 35% and Pb(II) up to 60. The composed granules were used for real effluent treatment. Obtained results indicated that this kind of composite biosorbent can be used in treatment of effluents contaminated with heavy metals pollution. Keywords: apricot shells, bentonite, biosorption, immobilization, Na-alginate. DOI: http://dx.doi.org/10.7251/JEPM1709076S
Online aceess of full paper is available at: www.engineeringscience.rs/browse-issues Cite article... more Online aceess of full paper is available at: www.engineeringscience.rs/browse-issues Cite article: Antanaskovic, A., Bulatovic, M., Rakin, M., Lopicic, Z., Sostaric, T., & Rakin, M. [2020]. Effect of corn straw pretreatment on efficiency of biogas production process computer simulation. Journal of Applied Engineering Science, 18(4), 561 564. Maja Bulatović University of Belgrade, Faculty of Technology and Metallurgy, Department of Biochemical engineering and biotechnology, Belgrade, Serbia
Journal of Environmental Chemical Engineering, 2021
Abstract Expanded vermiculite (EV) was modified by deposition of different spinel ferrite composi... more Abstract Expanded vermiculite (EV) was modified by deposition of different spinel ferrite composites on the outer surface of EV 2:1 layers in order to improve its adsorptive properties. Modifications were made by deposition of: magnetite, manganese ferrite, cobalt ferrite and chromium oxide/hematite. The characterization of modified materials was performed by: scanning electron microscopy (SEM), Brunauer-Emmett-Teller (BET) methodology, X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), magnetization measurements, as well as determination of cation exchange capacity (CEC) and pH point of zero charge (pHPZC). Obtained samples were used as adsorbents for Pb2+, Ni2+and Cd2+ ions from an aqueous solution in a batch system. Results showed that adsorption capacity was strongly dependent on physical and chemical changes induced by specific chemical modification. Hydrothermally produced manganese and cobalt ferrites caused significant surface changes and altered the interlayer cation balance. Among the others, EV-Mn/Co-ferrite(s) samples possessed the highest adsorption capacity towards Ni2+ (33.06 mg g-1), along with an increase of the CEC. Freundlich's adsorption isotherm model provided the best fit of obtained experimental data, while kinetic studies showed that the adsorption rate follows the pseudo second-order model, implying heterogeneous adsorbents surface. Thermodynamic and kinetic parameters indicated that the mechanism of cations removal efficacy was dominantly followed by the ion exchange. This study confirmed that doped ferrites, produced by solvothermal method, improve surface properties of EV and increase adsorption potentials towards heavy metals.
Sorbents Materials for Controlling Environmental Pollution, 2021
Abstract Based on the concept of circular economy and green chemistry, the conversion of wastes i... more Abstract Based on the concept of circular economy and green chemistry, the conversion of wastes into high added value products should be of great importance. From this point of view, this review chapter summarizes the application of pine-based adsorbents obtained from pine bark, pine cone and pine needles, to adsorb heavy metals, radionuclides, rare earths, and others from aqueous media. Effect of various parameters such as pH, temperature, and contact time is critically presented and discussed in detail. The adsorption capacities, fitted isotherm and kinetic models, as well as thermodynamic aspects, are also included in the discussion. The present compilation reveals that generally the experimental data are better fitted by the Langmuir isotherm and pseudo-second-order kinetic models and the adsorption is a spontaneous process. From this literature survey, it is evident that pine-based adsorbents have interesting adsorption properties and could be attractive candidates as adsorbents for inorganic pollutants removal from (waste)water.
A low-cost waste biomass generated from a food industry, apricot shells, was subjected to alkali ... more A low-cost waste biomass generated from a food industry, apricot shells, was subjected to alkali modification in order to compare morphology, crystalline structure and thermal stability of native and modified biomass, accompanied by their cellulose-rich fractions. The surface morphology and structure of compared samples were analysed by the scanning electron microscopy (SEM) and mercury porosimetry. Furthermore, Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) and thermal analysis (TG/DTA) were applied. The results have shown that after alkaline treatment, inter- and intra-particle porosity in the material rises, resulting in increase of the total surface area. The XRD diffractograms showed that crystallinity index increased together with crystallite size, suggesting that modified sample has more ordered crystalline structure than native sample (also confirmed by the FTIR analysis). Although the cellulose-rich fraction extracted from the alkali-modified sample showed higher thermal stability, the overall thermal analysis revealed that alkali-modified biomass has lower thermal stability than the native sample. This indicates that this type of modification will improve the fuel properties of this lignocellulosic biomass and imply its possible application in energy recovery process. Graphical abstract
DOAJ (DOAJ: Directory of Open Access Journals), Dec 1, 2017
In this work, the design and usage of biosorbents made of apricot shells (Prunus armeniaca L.), N... more In this work, the design and usage of biosorbents made of apricot shells (Prunus armeniaca L.), Na-alginate and bentonite, for heavy metals removal from wastewaters, were investigated. The effect of particle size on the biosorption process, were investigate and the smallest fraction, was immobilized in Na-alginate. Immobilization had a positive effect on the biosorption process, but due to the inhomogeneity of the granules, bentonite was added as a binding agent. The result was increase of Cu(II) and Zn(II) removal up to 35% and Pb(II) up to 60. The composed granules were used for real effluent treatment. Obtained results indicated that this kind of composite biosorbent can be used in treatment of effluents contaminated with heavy metals pollution. Keywords: apricot shells, bentonite, biosorption, immobilization, Na-alginate. DOI: http://dx.doi.org/10.7251/JEPM1709076S
Online aceess of full paper is available at: www.engineeringscience.rs/browse-issues Cite article... more Online aceess of full paper is available at: www.engineeringscience.rs/browse-issues Cite article: Antanaskovic, A., Bulatovic, M., Rakin, M., Lopicic, Z., Sostaric, T., & Rakin, M. [2020]. Effect of corn straw pretreatment on efficiency of biogas production process computer simulation. Journal of Applied Engineering Science, 18(4), 561 564. Maja Bulatović University of Belgrade, Faculty of Technology and Metallurgy, Department of Biochemical engineering and biotechnology, Belgrade, Serbia
Journal of Environmental Chemical Engineering, 2021
Abstract Expanded vermiculite (EV) was modified by deposition of different spinel ferrite composi... more Abstract Expanded vermiculite (EV) was modified by deposition of different spinel ferrite composites on the outer surface of EV 2:1 layers in order to improve its adsorptive properties. Modifications were made by deposition of: magnetite, manganese ferrite, cobalt ferrite and chromium oxide/hematite. The characterization of modified materials was performed by: scanning electron microscopy (SEM), Brunauer-Emmett-Teller (BET) methodology, X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), magnetization measurements, as well as determination of cation exchange capacity (CEC) and pH point of zero charge (pHPZC). Obtained samples were used as adsorbents for Pb2+, Ni2+and Cd2+ ions from an aqueous solution in a batch system. Results showed that adsorption capacity was strongly dependent on physical and chemical changes induced by specific chemical modification. Hydrothermally produced manganese and cobalt ferrites caused significant surface changes and altered the interlayer cation balance. Among the others, EV-Mn/Co-ferrite(s) samples possessed the highest adsorption capacity towards Ni2+ (33.06 mg g-1), along with an increase of the CEC. Freundlich's adsorption isotherm model provided the best fit of obtained experimental data, while kinetic studies showed that the adsorption rate follows the pseudo second-order model, implying heterogeneous adsorbents surface. Thermodynamic and kinetic parameters indicated that the mechanism of cations removal efficacy was dominantly followed by the ion exchange. This study confirmed that doped ferrites, produced by solvothermal method, improve surface properties of EV and increase adsorption potentials towards heavy metals.
Sorbents Materials for Controlling Environmental Pollution, 2021
Abstract Based on the concept of circular economy and green chemistry, the conversion of wastes i... more Abstract Based on the concept of circular economy and green chemistry, the conversion of wastes into high added value products should be of great importance. From this point of view, this review chapter summarizes the application of pine-based adsorbents obtained from pine bark, pine cone and pine needles, to adsorb heavy metals, radionuclides, rare earths, and others from aqueous media. Effect of various parameters such as pH, temperature, and contact time is critically presented and discussed in detail. The adsorption capacities, fitted isotherm and kinetic models, as well as thermodynamic aspects, are also included in the discussion. The present compilation reveals that generally the experimental data are better fitted by the Langmuir isotherm and pseudo-second-order kinetic models and the adsorption is a spontaneous process. From this literature survey, it is evident that pine-based adsorbents have interesting adsorption properties and could be attractive candidates as adsorbents for inorganic pollutants removal from (waste)water.
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