title: [Treating Cr(VI)-containing wastewater by a consortium of sulfate reducing bacteria and copper-iron bimetallic particles].
abstract: Copper-iron bimetallic particles were prepared by chemical precipitation technique. Under the help of the particles Cr(VI)-containing wastewater was well treated by a consortium of sulfate reducing bacteria, which were enriched from industrial wastewater and acclimatized to tolerant to high concentrations of Cr(VI). SRB-Cu/Fe system, traditional SRB system and Cu/Fe system were experimented in the batch bioreactor, respectively. It is demonstrated that SRB-Cu/Fe bimetallic system perform much better than traditional SRB system or copper-iron bimetallic. The acclimation period of SRB was significantly reduced and the inhibiting concentration of Cr(VI) of SRB was also greatly increased by approximately 200% (from 100 mg x L(-1) to 300 mg x L(-1)). Under the conditions of Cr(VI) 300 mg x L(-1), Q(Cu)/Fe 7.5%, pH 5.0-8.0, the concentration of total chromium was less than 0.512 mg/L, Cr(VI) less than 0.071 mg, Cu next to zero after 48 h treatment. Having biological, chemical advantages and high efficiency, the novel SRB-Cu/Fe system should have the broad application prospects in industrial wastewater.
authors.affiliation: College of Life Science, Hunan Normal University, Changsha 410081, China. hht_7201@163.com
authors.forename: Qi-Zhi
authors.initials: QZ
authors.lastname: He
authors.forename: Hui
authors.initials: H
authors.lastname: Chen
authors.forename: Dan
authors.initials: D
authors.lastname: Wang
authors.forename: Hua
authors.initials: H
authors.lastname: Li
authors.forename: Xing-Hu
authors.initials: XH
authors.lastname: Ding
authors.forename: Le
authors.initials: L
authors.lastname: Deng
mesh_terms: D019149:Bioreactors / Q000382:microbiology; D002857:Chromium / Q000737:chemistry / Q000302:isolation & purification* / Q000378:metabolism; D003300:Copper / Q000737:chemistry*; D007501:Iron / Q000737:chemistry*; D010316:Particle Size; D016999:Sulfur-Reducing Bacteria / Q000378:metabolism*; D014865:Waste Disposal, Fluid / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000737:chemistry / Q000302:isolation & purification / Q000378:metabolism
chemical_list: D014874:Water Pollutants, Chemical; D002857:Chromium; C074702:chromium hexavalent ion; D003300:Copper; D007501:Iron