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Residual organic matter and microbial respiration in bottom ash: Effects on metal leaching and eco-toxicity.

Ilyas, Aamir LU ; Persson, Kenneth M LU and Persson, Magnus LU (2015) In Waste Management & Research 33(9). p.805-811
Abstract
A common assumption regarding the residual organic matter, in bottom ash, is that it does not represent a significant pool of organic carbon and, beyond metal-ion complexation process, it is of little consequence to evolution of ash/leachate chemistry. This article evaluates the effect of residual organic matter and associated microbial respiratory processes on leaching of toxic metals (i.e. arsenic, copper, chromium, molybdenum, nickel, lead, antimony and zinc), eco-toxicity of ash leachates. Microbial respiration was quantified with help of a respirometric test equipment OXITOP control system. The effect of microbial respiration on metal/residual organic matter leaching and eco-toxicity was quantified with the help of batch leaching... (More)
A common assumption regarding the residual organic matter, in bottom ash, is that it does not represent a significant pool of organic carbon and, beyond metal-ion complexation process, it is of little consequence to evolution of ash/leachate chemistry. This article evaluates the effect of residual organic matter and associated microbial respiratory processes on leaching of toxic metals (i.e. arsenic, copper, chromium, molybdenum, nickel, lead, antimony and zinc), eco-toxicity of ash leachates. Microbial respiration was quantified with help of a respirometric test equipment OXITOP control system. The effect of microbial respiration on metal/residual organic matter leaching and eco-toxicity was quantified with the help of batch leaching tests and an eco-toxicity assay - Daphnia magna. In general, the microbial respiration process decreased the leachate pH and eco-toxicity, indicating modification of bioavailability of metal species. Furthermore, the leaching of critical metals, such as copper and chromium, decreased after the respiration in both ash types (fresh and weathered). It was concluded that microbial respiration, if harnessed properly, could enhance the stability of fresh bottom ash and may promote its reuse. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Waste Management & Research
volume
33
issue
9
pages
805 - 811
publisher
SAGE Publications Inc.
external identifiers
  • pmid:25999368
  • wos:000360005400005
  • scopus:84939560076
ISSN
1096-3669
DOI
10.1177/0734242X15585343
language
English
LU publication?
yes
id
fc258146-c6d2-452a-a3a5-78f743f30bac (old id 5442660)
date added to LUP
2015-06-22 13:06:38
date last changed
2017-01-01 04:11:12
@article{fc258146-c6d2-452a-a3a5-78f743f30bac,
  abstract     = {A common assumption regarding the residual organic matter, in bottom ash, is that it does not represent a significant pool of organic carbon and, beyond metal-ion complexation process, it is of little consequence to evolution of ash/leachate chemistry. This article evaluates the effect of residual organic matter and associated microbial respiratory processes on leaching of toxic metals (i.e. arsenic, copper, chromium, molybdenum, nickel, lead, antimony and zinc), eco-toxicity of ash leachates. Microbial respiration was quantified with help of a respirometric test equipment OXITOP control system. The effect of microbial respiration on metal/residual organic matter leaching and eco-toxicity was quantified with the help of batch leaching tests and an eco-toxicity assay - Daphnia magna. In general, the microbial respiration process decreased the leachate pH and eco-toxicity, indicating modification of bioavailability of metal species. Furthermore, the leaching of critical metals, such as copper and chromium, decreased after the respiration in both ash types (fresh and weathered). It was concluded that microbial respiration, if harnessed properly, could enhance the stability of fresh bottom ash and may promote its reuse.},
  author       = {Ilyas, Aamir and Persson, Kenneth M and Persson, Magnus},
  issn         = {1096-3669},
  language     = {eng},
  number       = {9},
  pages        = {805--811},
  publisher    = {SAGE Publications Inc.},
  series       = {Waste Management & Research},
  title        = {Residual organic matter and microbial respiration in bottom ash: Effects on metal leaching and eco-toxicity.},
  url          = {http://dx.doi.org/10.1177/0734242X15585343},
  volume       = {33},
  year         = {2015},
}