PMID- 17418487
OWN - NLM
STAT- MEDLINE
DCOM- 20071130
LR  - 20121115
IS  - 0304-3894 (Print)
IS  - 0304-3894 (Linking)
VI  - 148
IP  - 1-2
DP  - 2007 Sep 5
TI  - The use of 2D non-uniform electric field to enhance in situ bioremediation of 
      2,4-dichlorophenol-contaminated soil.
PG  - 29-37
AB  - In situ bioremediation is a safe and cost-effective technology for the cleanup of 
      organic-contaminated soil, but its remediation rate is usually very slow, which 
      results primarily from limited mass transfer of pollutants to the degrading 
      bacteria in soil media. This study investigated the feasibility of adopting 2D 
      non-uniform electric field to enhance in situ bioremediation process by promoting 
      the mass transfer of organics to degrading bacteria under in situ conditions. For 
      this purpose, a 2D non-uniform electrokinetic system was designed and tested at 
      bench-scale with a sandy loam as the model soil and 2,4-dichlorophenol (2,4-DCP) 
      as the model organic pollutant at two common operation modes (bidirectional and 
      rotational). Periodically, the electric field reverses its direction at 
      bidirectional mode and revolves a given angle at rotational mode. The results 
      demonstrated that the non-uniform electric field could effectively stimulate the 
      desorption and the movement of 2,4-DCP in the soil. The 2,4-DCP was mobilized 
      through soil media towards the anode at a rate of about 1.0 cmd(-1)V(-1). The 
      results also showed that in situ biodegradation of 2,4-DCP in the soil was 
      greatly enhanced by the applied 2D electric field upon operational mode. At the 
      bidirectional mode, an average 2,4-DCP removal of 73.4% was achieved in 15 days, 
      and the in situ biodegradation of 2,4-DCP was increased by about three times as 
      compared with that uncoupled with electric field, whereas, 34.8% of 2,4-DCP was 
      removed on average in the same time period at the rotational mode. In terms of 
      maintaining remediation uniformity in soil, the rotational operation remarkably 
      excelled the bidirectional operation. In the hexagonal treatment area, the 
      2,4-DCP removal efficiency adversely increase with the distance to the central 
      electrode at the bidirectional mode, while the rotational mode generated almost 
      uniform removal in soil bed.
FAU - Fan, Xiangyu
AU  - Fan X
AD  - Department of Environmental Science and Engineering, Tsinghua University, Haidian 
      District, Beijing 100084, PR China.
FAU - Wang, Hui
AU  - Wang H
FAU - Luo, Qishi
AU  - Luo Q
FAU - Ma, Jianwei
AU  - Ma J
FAU - Zhang, Xihui
AU  - Zhang X
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20070206
PL  - Netherlands
TA  - J Hazard Mater
JT  - Journal of hazardous materials
JID - 9422688
RN  - 0 (Chlorophenols)
RN  - 0 (Soil Pollutants)
RN  - R669TG1950 (2,4-dichlorophenol)
SB  - IM
MH  - *Biodegradation, Environmental
MH  - Chlorophenols/*metabolism
MH  - Soil Pollutants/*metabolism
MH  - Static Electricity
EDAT- 2007/04/10 09:00
MHDA- 2007/12/06 09:00
CRDT- 2007/04/10 09:00
PHST- 2005/07/18 00:00 [received]
PHST- 2006/11/28 00:00 [revised]
PHST- 2007/01/20 00:00 [accepted]
PHST- 2007/04/10 09:00 [pubmed]
PHST- 2007/12/06 09:00 [medline]
PHST- 2007/04/10 09:00 [entrez]
AID - S0304-3894(07)00222-1 [pii]
AID - 10.1016/j.jhazmat.2007.01.144 [doi]
PST - ppublish
SO  - J Hazard Mater. 2007 Sep 5;148(1-2):29-37. doi: 10.1016/j.jhazmat.2007.01.144. 
      Epub 2007 Feb 6.