PMID- 16337340
OWN - NLM
STAT- MEDLINE
DCOM- 20061102
LR  - 20161128
IS  - 0304-3894 (Print)
IS  - 0304-3894 (Linking)
VI  - 133
IP  - 1-3
DP  - 2006 May 20
TI  - Effects of pH on the chlorination process of phenols in drinking water.
PG  - 99-105
AB  - Toxic organic compounds detected generally in source water could combine with 
      chlorine and contribute significantly to chlorination disinfection by-products 
      (CDBPs). The effects of pH on species distribution of CDBPs and the kinetics of 
      chlorination were investigated using phenol as a model of ionizable toxic organic 
      compounds in the pH range of 6.0-9.0. It was found that five chlorination 
      products including 2-monochlorophenol (2-MCP), 4-monochlorophenol (4-MCP), 
      2,6-dichlorophenol (2,6-DCP), 2,4-dichlorophenol (2,4-DCP) and 
      2,4,6-trichlorophenol (TCP) were produced by successive chlorination 
      substitution. MCP (2-MCP and 4-MCP) were the dominant products and phenol partly 
      remained in acid media, while TCP and DCP (2,6-DCP and 2,4-DCP) were the main 
      components in neutral and alkaline media. A steady equilibrium of phenol and its 
      chlorination products was reached in 20-30 min in acid-, neutral- and slightly 
      alkaline media, and was delayed to 60-180 min in alkaline media. The difference 
      in properties between phenols and phenolates, and those between HOCl and ClO(-) 
      should be considered simultaneously in explaining the effects of pH on the 
      chlorination process with the theory of electrophilic substitution. These results 
      show that pH plays an important regulating role in the species distribution of 
      CDBPs and the kinetics of chlorination for ionizable toxic organic compounds in 
      chlorination.
FAU - Ge, Fei
AU  - Ge F
AD  - Department of Environmental Science, Zhejiang University, Hangzhou, China. 
      gefei@xtu.edu.cn
FAU - Zhu, Lizhong
AU  - Zhu L
FAU - Chen, Hairong
AU  - Chen H
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20051206
PL  - Netherlands
TA  - J Hazard Mater
JT  - Journal of hazardous materials
JID - 9422688
RN  - 0 (Phenols)
RN  - 4R7X1O2820 (Chlorine)
SB  - IM
MH  - Chemical Phenomena
MH  - Chemistry, Physical
MH  - Chlorine/*chemistry
MH  - Hydrogen-Ion Concentration
MH  - Molecular Structure
MH  - Phenols/*chemistry
MH  - Water Purification/*methods
MH  - Water Supply/*analysis
EDAT- 2005/12/13 09:00
MHDA- 2006/11/03 09:00
CRDT- 2005/12/13 09:00
PHST- 2005/08/10 00:00 [received]
PHST- 2005/09/22 00:00 [revised]
PHST- 2005/09/26 00:00 [accepted]
PHST- 2005/12/13 09:00 [pubmed]
PHST- 2006/11/03 09:00 [medline]
PHST- 2005/12/13 09:00 [entrez]
AID - S0304-3894(05)00625-4 [pii]
AID - 10.1016/j.jhazmat.2005.09.062 [doi]
PST - ppublish
SO  - J Hazard Mater. 2006 May 20;133(1-3):99-105. doi: 10.1016/j.jhazmat.2005.09.062. 
      Epub 2005 Dec 6.