江苏省农业科学院机构知识库

High efficiency and selectivity of MgFe-LDH modified wheat-straw biochar in the removal of nitrate from aqueous solutions

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文献类型：外文期刊

作者： Xue, Lihong ¹ ; Gao, Bin ² ; Wan, Yongshan ³ ; Fang, June ² ; Wang, Shengsen ² ; Li, Yuncong ³ ; Munoz-Carpena, Rafael ² ;

作者机构： 1.Jiangsu Acad Agr Sci, Nanjing 210014, Jiangsu, Peoples R China

2.Univ Florida, Dept Agr & Biol Engn, Gainesville, FL 32611 USA

3.Univ Florida, Dept Soil & Water Sci, Gainesville, FL 32611 USA

关键词： Engineered biochar;Layered double hydroxides;Nitrate adsorption;Ion selectivity

期刊名称：JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS （影响因子：5.876；五年影响因子：5.294 ）

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收录情况： SCI

摘要： Mg-Fe layered double hydroxide (MgFe-LDH) particles were incorporated into wheat-straw biochar by liquid-phase deposition. The obtained biochar/MgFe-LDH composite was used to remove nitrate from aqueous solutions. X-ray diffraction patterns demonstrated that LDH particles were successfully deposited onto the carbon surface within the biochar matrix. Adsorption kinetic and isotherm studies and the effects of co-existing anions and adsorbents dosages were investigated using laboratory batch sorption experiments. The biochar/MgFe-LDH composite showed a strong sorption ability to nitrate in aqueous solutions with the Langmuir maximum adsorption capacity of 24.8 mg/g. A high selectivity for nitrate of the biochar/MgFe-LDH composite was also observed irrespective of the co-existence of sulfate and phosphate. The biochar/MgFe-LDH composite can thus be potentially used as an alternative adsorbent for the treatment of nitrate-contaminated waters as well as a soil amendment for the reduction of soil nitrate leaching. (C) 2016 Taiwan Institute of Chemical Engineers. Published by Elsevier B.V. All rights reserved.

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