PMID- 23752372
OWN - NLM
STAT- MEDLINE
DCOM- 20130910
LR  - 20151119
IS  - 0273-1223 (Print)
IS  - 0273-1223 (Linking)
VI  - 67
IP  - 11
DP  - 2013
TI  - Investigation of UV-assisted chlorophenol congeners' degradation by organic 
      oxidant p-nitrobenzoic acid in basic media.
PG  - 2418-27
LID - 10.2166/wst.2013.131 [doi]
AB  - This research specifically addressed the photodegradation of selected model 
      chlorophenol (CP) congeners, 4-chlorophenol (4-CP), 2,4-dichlorophenol (2,4-DCP), 
      2,4,6-trichlorophenol (2,4,6-TCP) and pentachlorophenol (PCP), by an organic 
      oxidant, p-nitrobenzoic acid (PNBA), in basic media. The reactions were followed 
      by high-pressure liquid chromatography and gas chromatography-mass spectroscopy 
      analysis for residual concentration and the identification of photodegraded 
      products respectively. Initial degradation was confirmed by the formation of ring 
      cleavage compounds, and subsequent mineralization was evidently marked by an 
      increase in release of chloride ions in the time course profile. The presence of 
      fewer/no chlorine atoms in the degraded compounds corroborated the mineralization 
      by UV/PNBA action. The chemical oxygen demand (COD) was also observed to fall 
      appreciably to the extent of 73% during all CP congeners' degradation. The 
      maximum COD decrease was observed in PNBA-assisted 4-CP degradation. The overall 
      degradation kinetics conforming to second-order reaction is observed to follow 
      the order 4-CP > 2,4,6-TCP  approximately  PCP  approximately  2,4-DCP. The findings of this investigation 
      elucidated the fact that PNBA was capable of successfully degrading/mineralizing 
      the selected CP congeners.
FAU - Sharma, Swati
AU  - Sharma S
AD  - Department of Chemical Engineering, Sardar Vallabhbhai National Institute of 
      Technology, Surat 395007, Gujarat, India.
FAU - Mukhopadhyay, Mausumi
AU  - Mukhopadhyay M
FAU - Murthy, Zagabathuni Venkata Panchakshari
AU  - Murthy ZV
LA  - eng
PT  - Journal Article
PL  - England
TA  - Water Sci Technol
JT  - Water science and technology : a journal of the International Association on 
      Water Pollution Research
JID - 9879497
RN  - 0 (Chlorides)
RN  - 0 (Chlorophenols)
RN  - 0 (Nitrobenzoates)
RN  - 0 (Oxidants)
RN  - 0 (Water Pollutants, Chemical)
RN  - G83NWR61OW (4-nitrobenzoic acid)
SB  - IM
MH  - Biological Oxygen Demand Analysis
MH  - Chlorides/chemistry
MH  - Chlorophenols/*chemistry/*radiation effects
MH  - Kinetics
MH  - Nitrobenzoates/*chemistry
MH  - Oxidants/*chemistry
MH  - Photolysis
MH  - *Ultraviolet Rays
MH  - Water Pollutants, Chemical/chemistry/radiation effects
EDAT- 2013/06/12 06:00
MHDA- 2013/09/11 06:00
CRDT- 2013/06/12 06:00
PHST- 2013/06/12 06:00 [entrez]
PHST- 2013/06/12 06:00 [pubmed]
PHST- 2013/09/11 06:00 [medline]
AID - 10.2166/wst.2013.131 [doi]
PST - ppublish
SO  - Water Sci Technol. 2013;67(11):2418-27. doi: 10.2166/wst.2013.131.