title: Sulfate removal by Desulfovibrio sp. CMX in chelate scrubbing solutions for NO removal.
abstract: To study the effects of Fe chelate solution and nitrosyl-complex (Fe(II)EDTA-NO), which might be introduced in the simultaneous biodesulfurization and denitrification process, on the sulfate removal process, a sulfate reducing bacteria Desulfovibrio sp. CMX was investigated for its sulfate removal capacity in the presence of Fe chelate additives and Fe(II)EDTA-NO. Meanwhile, Fe(II)EDTA-NO reduction was also investigated. The addition of Fe(II)EDTA and Fe(III)EDTA could stimulate the sulfate reduction performance. Although Fe(II)EDTA-NO could inhibit the strain, CMX could survive by consuming lactate and recover its sulfate reducing activity after Fe(II)EDTA-NO removed. Sulfate reduction could be enhanced in higher Fe(II)EDTA-NO concentrations (2 and 4 mM) by lactate applied at the middle stage of the experiment, and 72.2% and 62.6% sulfate were removed in 182 h, respectively. In this study, above 90% Fe(II)EDTA-NO (0.25-4 mM) was removed less than 60 h, which was much faster than sulfate reduction.
authors.affiliation: Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, Linggong Road 2, Dalian 116024, PR China.
authors.forename: Mingxiang
authors.initials: M
authors.lastname: Chen
authors.forename: Yu
authors.initials: Y
authors.lastname: Zhang
authors.forename: Jiti
authors.initials: J
authors.lastname: Zhou
authors.forename: Xiyang
authors.initials: X
authors.lastname: Dong
authors.forename: Xiaojun
authors.initials: X
authors.lastname: Wang
authors.forename: Zhuang
authors.initials: Z
authors.lastname: Shi
mesh_terms: D002614:Chelating Agents / Q000737:chemistry*; D002849:Chromatography, Gas; D058440:Denitrification; D003901:Desulfovibrio / Q000145:classification / Q000378:metabolism*; D004492:Edetic Acid / Q000737:chemistry; D005290:Ferric Compounds / Q000737:chemistry*; D009569:Nitric Oxide / Q000302:isolation & purification*; D010084:Oxidation-Reduction; D010802:Phylogeny; D012996:Solutions; D013056:Spectrophotometry, Ultraviolet; D013431:Sulfates / Q000302:isolation & purification*
chemical_list: D002614:Chelating Agents; D005290:Ferric Compounds; D012996:Solutions; D013431:Sulfates; D009569:Nitric Oxide; D004492:Edetic Acid; C019179:Fe(III)-EDTA
keywords: Fe(II)EDTA-NO removal; FeEDTA solutions; Nitrosyl-complex; Sulfate reducing bacteria