Chemically modified biochar produced from conocarpus waste increases NO3 removal from aqueous solutions.
01 Apr 2016-Environmental Geochemistry and Health (Springer Netherlands)-Vol. 38, Iss: 2, pp 511-521
TL;DR: It is concluded that chemical modification can alter the surface chemistry of biochar, thereby leading to enhanced sorption capacity compared with simple biochars, which is higher than that of commercially available sorbents.
Abstract: Biochar has emerged as a universal sorbent for the removal of contaminants from water and soil. However, its efficiency is lower than that of commercially available sorbents. Engineering biochar by chemical modification may improve its sorption efficiency. In this study, conocarpus green waste was chemically modified with magnesium and iron oxides and then subjected to thermal pyrolysis to produce biochar. These chemically modified biochars were tested for NO3 removal efficiency from aqueous solutions in batch sorption isothermal and kinetic experiments. The results revealed that MgO-biochar outperformed other biochars with a maximum NO3 sorption capacity of 45.36 mmol kg(-1) predicted by the Langmuir sorption model. The kinetics data were well described by the Type 1 pseudo-second-order model, indicating chemisorption as the dominating mechanism of NO3 sorption onto biochars. Greater efficiency of MgO-biochar was related to its high specific surface area (391.8 m(2) g(-1)) and formation of strong ionic complexes with NO3. At an initial pH of 2, more than 89 % NO3 removal efficiency was observed for all of the biochars. We conclude that chemical modification can alter the surface chemistry of biochar, thereby leading to enhanced sorption capacity compared with simple biochar.
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Abstract: Biochar is mainly used as a soil amendment and for carbon sequestration; while other applications such as environmental remediation may be equally important. Recently, different engineering...
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Cites background from "Chemically modified biochar produce..."
...Chemical modification can alter the surface chemistry of biochar, thereby leading to an enhanced sorption capacity after modification (Ding, Hu, Wan, Wang, and Gao, 2016; Usman et al. 2016)....
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TL;DR: In this article, the authors provided an extensive summary of various production methods of magnetic biochar along with its application in wastewater treatment and selected polymer cooperation and showed a remarkable application as an adsorbent for various wastewater treatments and cooperated in certain selected polymer composites for application in supercapacitor.
Abstract: The development of magnetic biochar from biomass and the prospect of developing magnetic nanomaterials have attracted many researchers worldwide. The conversion of this biomass into something more prospective has reduced the waste management issue without any hassle. Magnetic biochar which is derived from various types of biomass exhibits a good magnetic property with high surface area and significant morphology through various production methods. These magnetic biochar showed a remarkable application as an adsorbent for various wastewater treatments and were cooperated in certain selected polymer composites for application in supercapacitor. This study provides an extensive summary of various production methods of magnetic biochar along with its application in wastewater treatment and selected polymer cooperation.
277 citations
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TL;DR: In this article, Flannery presented a Biochar Classification and Test Methods for determining the quantity of Biochar within Soils and its effect on Nutrient Transformations and Nutrient Leaching.
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1,967 citations