PMID- 16310822
OWN - NLM
STAT- MEDLINE
DCOM- 20060630
LR  - 20131121
IS  - 0045-6535 (Print)
IS  - 0045-6535 (Linking)
VI  - 63
IP  - 3
DP  - 2006 Apr
TI  - Correlations between arsenic in Maine groundwater and microbial populations as 
      determined by fluorescence in situ hybridization.
PG  - 440-8
AB  - Arsenic is known to cause serious health effects when consumed in drinking water. 
      In the state of Maine, approximately half of the population relies on private 
      groundwater wells for their drinking water. Of those wells, as many as 13% may 
      contain arsenic levels above the current EPA maximum contaminant level of 10 
      microgl(-1). Microorganisms can potentially contribute to arsenic release into 
      groundwater through several mechanisms. Some can reduce arsenate to arsenite, 
      which is more toxic and may be more mobile. Sulfurospirillum species NP4, which 
      was isolated from well water, respires arsenate and could act in this way. 
      Microorganisms can also act indirectly by reducing bedrock surface coatings, such 
      as iron oxyhydroxides, that adsorb arsenic in the groundwater environment. The 
      genus Geobacter contains many species that are capable of iron reduction that 
      could play a role in the indirect release of arsenic into groundwater. Water 
      samples from Northport, ME and the Branch Lake region of Ellsworth, ME, which 
      both have elevated groundwater arsenic levels, have been probed using 
      fluorescence in situ hybridization (FISH), to determine the percentage of the 
      population that is NP4 and the percentage that are Geobacter species. Geobacter 
      abundance correlates well with the total arsenic concentration indicating that 
      indirect mechanisms could be important in releasing arsenic. NP4 appears to be 
      reducing arsenate since its prevalence correlates well with arsenite, the end 
      product of arsenate respiration.
FAU - Weldon, Jennifer M
AU  - Weldon JM
AD  - Department of Civil and Environmental Engineering, University of Maine at Orono, 
      5711 Boardman Hall, 04469-5711, USA.
FAU - MacRae, Jean D
AU  - MacRae JD
LA  - eng
PT  - Journal Article
PT  - Research Support, U.S. Gov't, Non-P.H.S.
DEP - 20051128
PL  - England
TA  - Chemosphere
JT  - Chemosphere
JID - 0320657
RN  - 0 (Water Pollutants, Chemical)
RN  - E1UOL152H7 (Iron)
RN  - N712M78A8G (Arsenic)
SB  - IM
MH  - Arsenic/*analysis
MH  - Campylobacter/*isolation & purification
MH  - Environmental Monitoring
MH  - Fresh Water/analysis/microbiology
MH  - Geobacter/*isolation & purification
MH  - In Situ Hybridization, Fluorescence
MH  - Iron/analysis
MH  - Maine
MH  - Oxidation-Reduction
MH  - Water Microbiology
MH  - Water Pollutants, Chemical/*analysis
MH  - Water Supply/*analysis
EDAT- 2005/11/29 09:00
MHDA- 2006/07/01 09:00
CRDT- 2005/11/29 09:00
PHST- 2005/05/31 00:00 [received]
PHST- 2005/08/12 00:00 [revised]
PHST- 2005/08/16 00:00 [accepted]
PHST- 2005/11/29 09:00 [pubmed]
PHST- 2006/07/01 09:00 [medline]
PHST- 2005/11/29 09:00 [entrez]
AID - S0045-6535(05)01129-X [pii]
AID - 10.1016/j.chemosphere.2005.08.061 [doi]
PST - ppublish
SO  - Chemosphere. 2006 Apr;63(3):440-8. doi: 10.1016/j.chemosphere.2005.08.061. Epub 
      2005 Nov 28.