PMID- 24001665
OWN - NLM
STAT- MEDLINE
DCOM- 20140423
LR  - 20141120
IS  - 1879-1298 (Electronic)
IS  - 0045-6535 (Linking)
VI  - 93
IP  - 7
DP  - 2013 Oct
TI  - Remediation of Cr(VI) from chromium slag by biocementation.
PG  - 1352-8
LID - S0045-6535(13)01088-6 [pii]
LID - 10.1016/j.chemosphere.2013.08.008 [doi]
AB  - Here we demonstrate a calcifying ureolytic bacterium Bacillus sp. CS8 for the 
      bioremediation of chromate (Cr(VI)) from chromium slag based on microbially 
      induced calcite precipitation (MICP). A consolidated structure like bricks was 
      prepared from chromium slags using bacterial cells, and five stage Cr(VI) 
      sequential extraction was carried out to know their distribution pattern. Cr(VI) 
      mobility was found to significantly be decreased in the exchangeable fraction of 
      Cr slag and subsequently, the Cr(VI) concentration was markedly increased in 
      carbonated fraction after bioremediation. It was found that such Cr slag bricks 
      developed high compressive strength with low permeability. Further, leaching 
      behavior of Cr(VI) in the Cr slag was studied by column tests and remarkable 
      decrease in Cr(VI) concentration was noticed after bioremediation. Cr slags from 
      columns were characterized by SEM-EDS confirming MICP process in bioremediation. 
      The incorporation of Cr(VI) into the calcite surface forms a strong complex that 
      leads to obstruction in Cr(VI) release into the environment. As China is facing 
      chromium slag accidents at the regular time intervals, the technology discussed 
      in the present study promises to provide effective and economical treatment of 
      such sites across the country, however, it can be used globally.
CI  - Copyright (c) 2013 Elsevier Ltd. All rights reserved.
FAU - Achal, Varenyam
AU  - Achal V
AD  - Laboratory of Environmental Pollution and Bioremediation, Xinjiang Institute of 
      Ecology and Geography, Chinese Academy of Sciences, Urumqi, Xinjiang 830011, 
      China.
FAU - Pan, Xiangliang
AU  - Pan X
FAU - Lee, Duu-Jong
AU  - Lee DJ
FAU - Kumari, Deepika
AU  - Kumari D
FAU - Zhang, Daoyong
AU  - Zhang D
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20130831
PL  - England
TA  - Chemosphere
JT  - Chemosphere
JID - 0320657
RN  - 0 (Soil Pollutants)
RN  - 0R0008Q3JB (Chromium)
RN  - 18540-29-9 (chromium hexavalent ion)
SB  - IM
MH  - Biodegradation, Environmental
MH  - China
MH  - Chromium/*analysis/metabolism
MH  - Environmental Restoration and Remediation/*methods
MH  - Soil Pollutants/*analysis/metabolism
OTO - NOTNLM
OT  - Biocement
OT  - Bioremediation
OT  - Calcite
OT  - Chromium slag
OT  - Urease
EDAT- 2013/09/05 06:00
MHDA- 2014/04/24 06:00
CRDT- 2013/09/05 06:00
PHST- 2013/06/10 00:00 [received]
PHST- 2013/08/02 00:00 [revised]
PHST- 2013/08/06 00:00 [accepted]
PHST- 2013/09/05 06:00 [entrez]
PHST- 2013/09/05 06:00 [pubmed]
PHST- 2014/04/24 06:00 [medline]
AID - S0045-6535(13)01088-6 [pii]
AID - 10.1016/j.chemosphere.2013.08.008 [doi]
PST - ppublish
SO  - Chemosphere. 2013 Oct;93(7):1352-8. doi: 10.1016/j.chemosphere.2013.08.008. Epub 
      2013 Aug 31.