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Effects of bacterially produced precipitates on the metabolism of sulfate reducing bacteria during the bio-treatment process of copper-containing wastewater
Sheng YuXing; Cao HongBin1; Li YuPing; Zhang Yi; Cao, HB
2010-12-01
Source PublicationSCIENCE CHINA-CHEMISTRY
ISSN1674-7291
Volume53Issue:12Pages:2608-2615
AbstractA large volume of bacterially produced precipitates are generated during the bio-treatment of heavy metal wastewater. The composition of the bacterially produced precipitates and its effects on sulfate reducing bacteria (SRB) in copper-containing waste stream were evaluated in this study. The elemental composition of the microbial precipitate was studied using electrodispersive X-ray spectroscopy (EDX), and it was found that the ratio of S:Cu was 1.12. Combining with the results of copper distribution in the SRB metabolism culture, which was analyzed by the sequential extraction procedure, copper in the precipitates was determined as covellite (CuS). The bacterially produced precipitates caused a decrease of the sulfate reduction rate, and the more precipitates were generated, the lower the sulfate reduction rate was. The particle sizes of bacterially generated covellite were ranging from 0.03 to 2 mu m by particles size distribution (PSD) analysis, which was smaller than that of the SRB cells. Transmission electron microscopy (TEM) analysis showed that the microbial covellite was deposited on the surface of the cell. The effects of the microbial precipitate on SRB metabolism were found to be weakened by increasing the precipitation time and adding microbial polymeric substances in later experiments. These results provided direct evidence that the SRB activity was inhibited by the bacterially produced covellite, which enveloped the bacterium and thus affected the metabolism of SRB on mass transfer.
KeywordSulfate Reducing Bacteria Covellite Heavy Metal Wastewater
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1007/s11426-010-4091-z
Indexed BySCI
Language英语
WOS KeywordACID-MINE DRAINAGE ; HEAVY-METALS ; DESULFOVIBRIO-VULGARIS ; TOXICITY ; BIOREACTORS ; RECOVERY
WOS Research AreaChemistry
WOS SubjectChemistry, Multidisciplinary
WOS IDWOS:000285366200024
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Version出版稿
Identifierhttp://ir.ipe.ac.cn/handle/122111/5567
Collection湿法冶金清洁生产技术国家工程实验室
Corresponding AuthorCao, HB
Affiliation1.Chinese Acad Sci, Inst Proc Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Beijing 100190, Peoples R China
2.Chinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Sheng YuXing,Cao HongBin,Li YuPing,et al. Effects of bacterially produced precipitates on the metabolism of sulfate reducing bacteria during the bio-treatment process of copper-containing wastewater[J]. SCIENCE CHINA-CHEMISTRY,2010,53(12):2608-2615.
APA Sheng YuXing,Cao HongBin,Li YuPing,Zhang Yi,&Cao, HB.(2010).Effects of bacterially produced precipitates on the metabolism of sulfate reducing bacteria during the bio-treatment process of copper-containing wastewater.SCIENCE CHINA-CHEMISTRY,53(12),2608-2615.
MLA Sheng YuXing,et al."Effects of bacterially produced precipitates on the metabolism of sulfate reducing bacteria during the bio-treatment process of copper-containing wastewater".SCIENCE CHINA-CHEMISTRY 53.12(2010):2608-2615.
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