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Precipitation of heavy metals from landfill leachates by microbially-produced sulphide

Möller, Anna LU ; Grahn, A and Welander, Ulrika LU (2004) In Environmental Technology 25(1). p.69-77
Abstract
Four leachates from two landfills in Sweden were treated for the removal of heavy metals with the aid of sulphate-reducing bacteria (SRB). Both continuous and batch experiments were performed. A packed-bed process was used for sulphide production. The metals studied were As, Cd, Cr, Cu, Hg, Ni, Pb, and Zn. The continuous experiments showed that Cd and Cu were most efficiently removed and that Cr was the most difficult to precipitate. In a continuous experiment with one of the leachates, the removal of Cd, Cu and Zn depended upon the retention time in the system. In the batch experiments, precipitation of the metals was a relatively fast process. No significant differences in metal concentrations were found between experiments terminated... (More)
Four leachates from two landfills in Sweden were treated for the removal of heavy metals with the aid of sulphate-reducing bacteria (SRB). Both continuous and batch experiments were performed. A packed-bed process was used for sulphide production. The metals studied were As, Cd, Cr, Cu, Hg, Ni, Pb, and Zn. The continuous experiments showed that Cd and Cu were most efficiently removed and that Cr was the most difficult to precipitate. In a continuous experiment with one of the leachates, the removal of Cd, Cu and Zn depended upon the retention time in the system. In the batch experiments, precipitation of the metals was a relatively fast process. No significant differences in metal concentrations were found between experiments terminated after a day and those terminated after a week. In a batch experiment involving one of the leachates, the precipitation of Cd and Cu was shown to be dependent upon the metal:sulphide ratio. Removal of the metals increased with an increase in the sulphide:metal ratio up to 45:1. The process with SRB showed an interesting potential for removal of heavy metals from leachates. One of the two leachates for which the highest metal removals were obtained came from a landfill for hazardous waste. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
landfill, leachate, sulphate-reducing bacteria, heavy metals
in
Environmental Technology
volume
25
issue
1
pages
69 - 77
publisher
Selper Ltd
external identifiers
  • wos:000220130900008
  • scopus:1542376008
ISSN
1479-487X
language
English
LU publication?
yes
id
3e5ab89a-af84-40cd-ba38-5099f4874b0a (old id 140720)
alternative location
http://www.ingentaconnect.com/content/selp/envt/2004/00000025/00000001/art00008
date added to LUP
2007-07-02 13:57:23
date last changed
2017-06-04 03:41:13
@article{3e5ab89a-af84-40cd-ba38-5099f4874b0a,
  abstract     = {Four leachates from two landfills in Sweden were treated for the removal of heavy metals with the aid of sulphate-reducing bacteria (SRB). Both continuous and batch experiments were performed. A packed-bed process was used for sulphide production. The metals studied were As, Cd, Cr, Cu, Hg, Ni, Pb, and Zn. The continuous experiments showed that Cd and Cu were most efficiently removed and that Cr was the most difficult to precipitate. In a continuous experiment with one of the leachates, the removal of Cd, Cu and Zn depended upon the retention time in the system. In the batch experiments, precipitation of the metals was a relatively fast process. No significant differences in metal concentrations were found between experiments terminated after a day and those terminated after a week. In a batch experiment involving one of the leachates, the precipitation of Cd and Cu was shown to be dependent upon the metal:sulphide ratio. Removal of the metals increased with an increase in the sulphide:metal ratio up to 45:1. The process with SRB showed an interesting potential for removal of heavy metals from leachates. One of the two leachates for which the highest metal removals were obtained came from a landfill for hazardous waste.},
  author       = {Möller, Anna and Grahn, A and Welander, Ulrika},
  issn         = {1479-487X},
  keyword      = {landfill,leachate,sulphate-reducing bacteria,heavy metals},
  language     = {eng},
  number       = {1},
  pages        = {69--77},
  publisher    = {Selper Ltd},
  series       = {Environmental Technology},
  title        = {Precipitation of heavy metals from landfill leachates by microbially-produced sulphide},
  volume       = {25},
  year         = {2004},
}