Carboxyl and hydroxyl groups enhance ammonium adsorption capacity of iron (III) chloride and hydrochloric acid modified biochars

文献类型： 外文期刊

第一作者： Wang, Siyuan

作者： Wang, Siyuan;Ai, Shaoying;Li, Yichun;Wang, Siyuan;Nzediegwu, Christopher;Chang, Scott X.;Kwak, Jin-Hyeob;Islam, Md Shahinoor;Chang, Scott X.

作者机构：

关键词： Adsorption mechanism; Ammonium; Biochar; Chemical modification; Electron shuttle

期刊名称：BIORESOURCE TECHNOLOGY （ 影响因子：9.642； 五年影响因子：9.237 ）

ISSN： 0960-8524

年卷期： 2020 年 309 卷

页码：

收录情况： SCI

摘要： The effectiveness of the modification of wheat straw biochar using FeCl3 and HCl, alone or combined, on ammonium adsorption was evaluated using kinetic and isotherm models. The adsorption mechanisms were studied by comparative analysis of the surface properties of the biochars before and after ammonium adsorption. The results indicate that the modification methods enhanced the ammonium adsorption capacity by at least 14%, due to the increased -OH and O-C=O functional groups and specific surface area, and increased Fe3+/Fe2+ redox coupling serving as an electron shuttle. It can be concluded that chemical modification of wheat straw biochars using FeCl3 and HCl increased the effectiveness of biochars for the treatment of ammonium-contaminated wastewater.

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