title: Enhanced bioremediation of heavy metal from effluent by sulfate-reducing bacteria with copper-iron bimetallic particles support.
abstract: The purpose of this study was to investigate the potential of copper-iron bimetallic particles supported sulfate-reducing bacteria (SRB) in enhancing the reduction of Cu(2+) and Zn(2+) in effluent. The results showed that the copper-iron bimetallic particles can enhance Cu(2+) and Zn(2+) removal and the resistance of the sulfate-reducing bacteria towards metals toxicity, the inhibiting concentration of Cu(2+) and Zn(2+) for SRB was significantly increased (from 100 to 200 mg/L for Cu(2+) and 300 to 400 mg/L for Zn(2+)). The removal efficiencies of Cu(2+) and Zn(2+) (initial concentration 100 mg/L) were 98.17% and 99.67% in SRB-Cu/Fe system after 48 h, while only 29.83% Cu(2+), 90.88% Zn(2+) and 63.81% Cu(2+), 72.63% Zn(2+) were removed in the SRB and Cu/Fe system at the same condition.
authors.affiliation: The Co-construction Laboratory of Microbial Molecular Biology of Province and Ministry of Science and Technology, College of Life Sciences, Hunan Normal University, Changsha, Hunan 410081, PR China.
authors.forename: Qin
authors.initials: Q
authors.lastname: Zhou
authors.forename: Yongzhe
authors.initials: Y
authors.lastname: Chen
authors.forename: Ming
authors.initials: M
authors.lastname: Yang
authors.forename: Wenkai
authors.initials: W
authors.lastname: Li
authors.forename: Le
authors.initials: L
authors.lastname: Deng
mesh_terms: D001419:Bacteria / Q000378:metabolism* / Q000648:ultrastructure; D001673:Biodegradation, Environmental; D003300:Copper / Q000302:isolation & purification*; D006863:Hydrogen-Ion Concentration; D007501:Iron / Q000378:metabolism*; D013431:Sulfates / Q000378:metabolism*; D013696:Temperature; D013997:Time Factors; D014865:Waste Disposal, Fluid; D015032:Zinc / Q000302:isolation & purification*
chemical_list: D013431:Sulfates; D003300:Copper; D007501:Iron; D015032:Zinc