DOI: 10.1016/j.watres.2018.04.035
Scopus记录号: 2-s2.0-85046368103
论文题名: Semi-passive in-situ pilot scale bioreactor successfully removed sulfate and metals from mine impacted water under subarctic climatic conditions
作者: Nielsen G. ; Hatam I. ; Abuan K.A. ; Janin A. ; Coudert L. ; Blais J.F. ; Mercier G. ; Baldwin S.A.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 140 起始页码: 268
结束页码: 279
语种: 英语
英文关键词: Bioremediation
; Cadmium
; Semi-passive treatment
; Subarctic
; Sulfate-reducing bacteria
; Zinc
Scopus关键词: Aquatic ecosystems
; Bioconversion
; Biological water treatment
; Bioreactors
; Bioremediation
; Cadmium
; Carbon
; Cost effectiveness
; Drainage
; Efficiency
; Leaching
; Reduction
; Sulfur compounds
; Waste treatment
; Water pollution
; Zinc
; Anaerobic bioreactors
; Environmental threats
; Microbial community analysis
; Passive treatment
; Removal efficiencies
; Subarctic
; Sulfate reducing bacteria
; Treatment technologies
; Bacteria
; biological marker
; cadmium
; ground water
; hydrogen sulfite reductase
; metal
; molasses
; RNA 16S
; sulfate
; water
; zinc
; bioreactor
; bioremediation
; cadmium
; climate conditions
; enzyme activity
; heavy metal
; metal
; microbial activity
; microbial community
; microbial ecology
; mine
; mine drainage
; pollutant removal
; precipitation (chemistry)
; subarctic region
; sulfate
; sulfate-reducing bacterium
; zinc
; Article
; carbon source
; climate
; controlled study
; high throughput sequencing
; leaching
; microbial community
; mining
; nonhuman
; phylogeny
; polymerase chain reaction
; precipitation
; priority journal
; quantitative assay
; retention time
; rock
; species composition
; sulfate reducing bacterium
; summer
; temperature
; waste component removal
; waste water management
; winter
; Yukon
; Canada
; Yukon Territory
; Bacteria (microorganisms)
英文摘要: Mine drainage contaminated with metals is a major environmental threat since it is a source of water pollution with devastating effects on aquatic ecosystems. Conventional active treatment technologies are prohibitively expensive and so there is increasing demand to develop reliable, cost-effective and sustainable passive or semi-passive treatment. These are promising alternatives since they leverage the metabolism of microorganisms native to the disturbed site at in situ or close to in situ conditions. Since this is a biological approach, it is not clear if semi-passive treatment would be effective in remote locations with extremely cold weather such as at mines in the subarctic. In this study we tested the hypothesis that sulfate-reducing bacteria, which are microorganisms that promote metal precipitation, exist in subarctic mine environments and their activity can be stimulated by adding a readily available carbon source. An experiment was setup at a closed mine in the Yukon Territory, Canada, where leaching of Zn and Cd occurs. To test if semi-passive treatment could precipitate these metals and prevent further leaching from waste rock, molasses as a carbon source was added to anaerobic bioreactors mimicking the belowground in-situ conditions. Microbial community analysis confirmed that sulfate-reducing bacteria became enriched in the bioreactors upon addition of molasses. The population composition remained fairly stable over the 14 month operating period despite temperature shifts from 17 to 5 °C. Sulfate reduction functionality was confirmed by quantification of the gene for dissimilatory sulfite reductase. Metals were removed from underground mine drainage fed into the bioreactors with Zn removal efficiency varying between 20.9% in winter and 89.3% in summer, and Cd removal efficiency between 39% in winter and 90.5% in summer. This study demonstrated that stimulation of native SRB in MIW was possible and that in situ semi-passive treatment can be effective in removing metals despite the cold climate. © 2018 Elsevier Ltd
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112700
Appears in Collections: 气候减缓与适应
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作者单位: Institut national de la recherche scientifique (Centre Eau, Terre et Environnement), Université du Québec, 490 rue de la Couronne, Québec, QC G1K 9A9, Canada; Chemical and Biological Engineering, UBC Vancouver Campus 2360 East Mall, Vancouver, BC V6T 1Z3, Canada; Yukon Research Center, 500 College Drive, PO Box 2799, Whitehorse, YT Y1A 5K4, Canada
Recommended Citation:
Nielsen G.,Hatam I.,Abuan K.A.,et al. Semi-passive in-situ pilot scale bioreactor successfully removed sulfate and metals from mine impacted water under subarctic climatic conditions[J]. Water Research,2018-01-01,140