title: Acid tolerance of an acid mine drainage bioremediation system based on biological sulfate reduction.
abstract: The acid tolerance response of an AMD bioremediation system based on sulfate reduction was investigated. Efficient sulfate reduction was observed with a maximum sulfate reduction rate of 12.3±0.8 mg L(-1) d(-1) and easily available organic carbon was released during high acid treatment with an initial pH of 2.0. The rapid increase in sulfate reduction was observed when the extreme acid treatment with an initial pH of 1.0 was stopped. Column experiment on acid shock showed that efficient sulfate reduction was maintained while precipitation of Cu or Zn still occurred during extreme or high acid shock. More than 98% of Cu and 85% of Zn were removed in the high acid column experiment with influent pH of 2.0. The majority bacteria in the remediation system used for high acid drainage belonged to genera Clostridiaceae, Eubacterium, Pseudobutyrivibrio, and Clostridium. These findings showed high acid tolerance of the straw remediation system.
authors.affiliation: School of Resources and Environmental Engineering, Hefei University of Technology, Hefei 230009, Anhui Province, PR China. lujian.leonard@gmail.com
authors.forename: Jian
authors.initials: J
authors.lastname: Lu
authors.forename: Tianhu
authors.initials: T
authors.lastname: Chen
authors.forename: Jun
authors.initials: J
authors.lastname: Wu
authors.forename: P Chris
authors.initials: PC
authors.lastname: Wilson
authors.forename: Xiangyang
authors.initials: X
authors.lastname: Hao
authors.forename: Jiazhong
authors.initials: J
authors.lastname: Qian
mesh_terms: D000143:Acids / Q000737:chemistry*; D001419:Bacteria / Q000235:genetics / Q000378:metabolism; D001673:Biodegradation, Environmental; D002244:Carbon / Q000032:analysis; D006863:Hydrogen-Ion Concentration; D008906:Mining; D010084:Oxidation-Reduction; D010802:Phylogeny; D013431:Sulfates / Q000032:analysis / Q000378:metabolism*; D014865:Waste Disposal, Fluid
chemical_list: D000143:Acids; D013431:Sulfates; D002244:Carbon