PMID- 15562996
OWN - NLM
STAT- MEDLINE
DCOM- 20050131
LR  - 20191109
IS  - 0923-9820 (Print)
IS  - 0923-9820 (Linking)
VI  - 15
IP  - 6
DP  - 2004 Dec
TI  - Long-term sustainability of reductive dechlorination reactions at chlorinated 
      solvents sites.
PG  - 387-94
AB  - The sustainability of biodegradation reactions is of interest at Type 1 
      chlorinated solvent sites where monitored natural attenuation is being considered 
      as a remedial alternative. Type 1 chlorinated solvent sites are sites undergoing 
      reductive dechlorination where anthropogenic substrates (such as landfill 
      leachate or fermentable organics in the waste materials) ferment to produce 
      hydrogen, a key electron donor. A framework is provided that classifies Type 1 
      chlorinated solvent sites based on the relative amounts and the depletion rates 
      of the electron donors and the electron acceptors (i.e., chlorinated solvents). 
      Expressions are presented for estimating the total electron donor demand due to 
      the presence of solvents and competing electron acceptors such as dissolved 
      oxygen, nitrate, and sulfate. Finally, a database of 13 chlorinated solvent sites 
      was analyzed to estimate the median and maximum mass discharge rate for dissolved 
      oxygen, nitrate, and sulfate flowing into chlorinated solvent plumes. These 
      values were then used to calculate the amount of hydrogen equivalents and 
      potential for lost perchloroethylene (PCE) biodegradation represented by the 
      inflow of these competing electron acceptors. The median and maximum mass of PCE 
      biodegradation lost due to competing electron acceptors, assuming 100% 
      efficiency, was 226 and 4621 kg year(-1), respectively.
FAU - Newell, Charles J
AU  - Newell CJ
AD  - Groundwater Services, Inc, Houston, TX 77098, USA. cjnewell@gsi-net.com
FAU - Aziz, Carol E
AU  - Aziz CE
LA  - eng
PT  - Journal Article
PL  - Netherlands
TA  - Biodegradation
JT  - Biodegradation
JID - 9100834
RN  - 0 (Hydrocarbons, Chlorinated)
RN  - 0 (Solvents)
RN  - 0 (Water Pollutants, Chemical)
RN  - TJ904HH8SN (Tetrachloroethylene)
SB  - IM
MH  - *Biodegradation, Environmental
MH  - Electron Transport
MH  - Hydrocarbons, Chlorinated/*metabolism
MH  - Models, Biological
MH  - Solvents/*metabolism
MH  - Tetrachloroethylene/metabolism
MH  - Time Factors
MH  - Water Pollutants, Chemical/metabolism
EDAT- 2004/11/26 09:00
MHDA- 2005/02/03 09:00
CRDT- 2004/11/26 09:00
PHST- 2004/11/26 09:00 [pubmed]
PHST- 2005/02/03 09:00 [medline]
PHST- 2004/11/26 09:00 [entrez]
AID - 10.1023/b:biod.0000044682.92391.bb [doi]
PST - ppublish
SO  - Biodegradation. 2004 Dec;15(6):387-94. doi: 10.1023/b:biod.0000044682.92391.bb.