期刊
FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY
卷 10, 期 -, 页码 -出版社
FRONTIERS MEDIA SA
DOI: 10.3389/fbioe.2022.935525
关键词
Cr(VI); biochar; nanoscale zerovalent iron; adsorption; reduction
资金
- National Key Research and Development Program of China [2018YFC1802400]
A novel biochar-loaded nano-zerovalent iron composite (nZVI@CMBC) was developed and applied for the removal of hexavalent chromium in wastewater. The results showed that the nZVI@CMBC composite had a high removal efficiency of Cr(VI) under acidic conditions, with a value of 124.12 mg g(-1).
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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