PMID- 16764464
OWN - NLM
STAT- MEDLINE
DCOM- 20060801
LR  - 20190917
IS  - 0730-7268 (Print)
IS  - 0730-7268 (Linking)
VI  - 25
IP  - 6
DP  - 2006 Jun
TI  - Pyrolusite (beta-MnO2)-mediated, near dry-phase oxidation of 
      2,4,6-trichlorophenol.
PG  - 1474-9
AB  - The pyrolusite (beta-MnO2)-mediated oxidation of 2,4,6-trichlorophenol (TCP) 
      under nonaqueous conditions was investigated to assess the potential for abiotic 
      transformations of chlorophenols and their transformation pathways when they are 
      released to soils and the vadose zone. Lower rates of TCP oxidation were found at 
      lower relative humidities, but the rates were still relatively high under 
      near-dry conditions, with 86% of the TCP transformed within 24 h at less than 2% 
      relative humidity. The rates of TCP transformation and soluble manganese 
      formation at less than 2% relative humidity were not affected by atmospheric 
      oxygen content. The manganese oxide-mediated oxidation of TCP resulted in the 
      formation of 2,6-dichloro-1,4-benzoquinone and dimers, including polychlorinated 
      phenoxyphenols and at least one tetrachlorodibenzo-p-dioxin. The products are 
      consistent with the proposed mechanism in which some of the TCP is transformed 
      into trichlorophenoxy radicals that attack TCP and its transformation products. 
      The present results demonstrate that naturally occurring manganese oxides have 
      the potential to oxidize industrial compounds such as TCP; however, the 
      transformation products may be more toxic and persistent than the parent 
      compound.
FAU - Smith, Brant A
AU  - Smith BA
AD  - Department of Civil and Environmental Engineering, Washington State University, 
      Pullman, Washington 99164, USA.
FAU - Siems, William E
AU  - Siems WE
FAU - Teel, Amy L
AU  - Teel AL
FAU - Watts, Richard J
AU  - Watts RJ
LA  - eng
PT  - Journal Article
PT  - Research Support, U.S. Gov't, Non-P.H.S.
PL  - United States
TA  - Environ Toxicol Chem
JT  - Environmental toxicology and chemistry
JID - 8308958
RN  - 0 (Chlorophenols)
RN  - 0 (Manganese Compounds)
RN  - 0 (Oxides)
RN  - MHS8C5BAUZ (2,4,6-trichlorophenol)
RN  - TF219GU161 (manganese dioxide)
SB  - IM
MH  - Chlorophenols/*chemistry
MH  - Manganese Compounds/*chemistry
MH  - Oxidation-Reduction
MH  - Oxides/*chemistry
EDAT- 2006/06/13 09:00
MHDA- 2006/08/02 09:00
CRDT- 2006/06/13 09:00
PHST- 2006/06/13 09:00 [pubmed]
PHST- 2006/08/02 09:00 [medline]
PHST- 2006/06/13 09:00 [entrez]
AID - 10.1897/05-435r.1 [doi]
PST - ppublish
SO  - Environ Toxicol Chem. 2006 Jun;25(6):1474-9. doi: 10.1897/05-435r.1.