文献类型：期刊文献

英文题名：Removal of Cr(VI) from acid mine drainage with clay-biochar composite

作者：Wang, Hai[1];Tan, Liya[1];Hu, Baowei[1];Qiu, Muqing[1];Liang, Liping[1];Bao, Linfa[1];Zhu, Yuling[1];Chen, Guohe[1];Huang, Chengcai[1]

机构：[1]Shaoxing Univ, Coll Life Sci, Shaoxing 312000, Zhejiang, Peoples R China

年份：2019

卷号：165

起止页码：212

外文期刊名：DESALINATION AND WATER TREATMENT

收录：SCI-EXPANDED(收录号：WOS:000484855800022)、、Scopus(收录号：2-s2.0-85073368281)、WOS

基金：Financial support from the Research Fund Program of National Nature Science Foundation of China (No. 21876115; 41807468; 31500321)

语种：英文

外文关键词：Biochar; Clay; Cr(VI); Adsorption; Acid mine drainage

外文摘要：A novel biochar-montmorillonite (B@M) composites was synthesized by heating peanut shell B@M and was used to remove Cr(VI) from acid mine drainage (AMD). Batch characterization confirmed that the biochar surface was covered with montmorillonite successfully. The batch adsorption experiment demonstrated that the maximum adsorption capacity of biochar and B@M was 9.18 and 12.18 mg/g, respectively. The adsorption kinetics and isotherms can be satisfactorily fitted by pseudo-second kinetic model and Langmuir model, respectively. No effect of SO42- on Cr(VI) removal implied that B@M can simultaneously remove Cr(VI) from SO42- aqueous solutions. XPS analysis showed that adsorption, reduction and precipitation were involved in the removal process due to the presence of Fe(II) in montmorillonite. These findings suggested that the engineered biochar-based composite may be a valuable adsorbent for the removal of Cr(VI) from AMD.