Open AccessEnhanced biotreatment of acid mine drainage in the presence of zero-valent iron and zero-valent copper
Author(s) -
Xiaobing Hu,
Biaosheng Lin,
Fengqing Gao
Publication year - 2018
Publication title -
journal of water reuse and desalination
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.548
H-Index - 16
eISSN - 2408-9370
pISSN - 2220-1319
DOI - 10.2166/wrd.2018.014
Subject(s) - acid mine drainage , sulfate , zerovalent iron , sulfate reducing bacteria , wastewater , chemistry , copper , bimetallic strip , heavy metals , copper sulfate , environmental chemistry , environmental engineering , inorganic chemistry , nuclear chemistry , waste management , catalysis , environmental science , adsorption , biochemistry , organic chemistry , engineering
Batch laboratorial experiments were conducted to evaluate the potential of Fe0, Cu0 and sulfate-reducing bacteria (SRB) for reduction and removal of sulfate and heavy metals from synthetic acid mine drainage. The variation in solution pH indicates that the Fe0/Cu0 bimetallic system provided favorable conditions for SRB growth and sulfate reduction. When the SO42− concentration of wastewater was 3,000 mg/L, the SO42− removal efficiency was 51.6% for the SRB system, 76.3% for the Fe + SRB system, and 92.0% for the Fe/Cu + SRB system. Moreover, Pb2+, Cu2+ and Zn2+ ions were completely removed. The results demonstrate that the Fe/Cu + SRB system had apparent advantages over the SRB system, especially at low pH. This study demonstrates that an Fe/Cu + SRB system could be a promising technology for treating wastewater containing high concentrations of sulfate and heavy metals.
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