零价铁
生物炭
吸附
六价铬
铬
化学
鸡粪
化学工程
肥料
废水
复合数
色散(光学)
活性炭
核化学
原材料
材料科学
废物管理
复合材料
有机化学
热解
工程类
物理
光学
生物
生态学
作者
Shengqiong Fang,Xiaoyi Huang,Shuangling Xie,Jiale Du,Jianlong Zhu,Kai Wang,Qinglin Zhuang,Xuan Huang
标识
DOI:10.3389/fbioe.2022.935525
摘要
Using chicken manure as raw material to prepare activated carbon as a dispersant, a novel biochar-loaded nano-zerovalent iron composite (nZVI@CMBC) was developed and applied to remove hexavalent chromium, i.e., Cr(VI), in wastewater. The dispersion of nano-zerovalent iron (nZVI) particles on the surface of chicken manure-derived biochar (CMBC) successfully inhibited the aggregation of magnetic iron particles and effectively reduced the size of nZVI particles. The results demonstrated that under acidic conditions, the removal efficiency of Cr(VI) by the nZVI@CMBC composite could reach 124.12 mg g-1. The pseudosecond-order kinetic model had a good agreement with the adsorption kinetics of the nZVI@CMBC composite, implying that the adsorption of Cr(VI) is based on the multi-layer chemical adsorption. Therefore, this study provides a new clue and strategy for removing Cr(VI) in wastewater.
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