PMID- 19553012
OWN - NLM
STAT- MEDLINE
DCOM- 20091207
LR  - 20131121
IS  - 1873-3336 (Electronic)
IS  - 0304-3894 (Linking)
VI  - 170
IP  - 2-3
DP  - 2009 Oct 30
TI  - Effects of dissolved gases and pH on sonolysis of 2,4-dichlorophenol.
PG  - 1273-6
LID - 10.1016/j.jhazmat.2009.05.130 [doi]
AB  - Ultrasonic degradation of 2,4-dichlorophenol (2,4-DCP) has been studied under 
      oxygen, air, argon, and nitrogen in aqueous solutions for a liquid temperature of 
      20 degrees C at 489 kHz. The degradation rate increases significantly in the 
      presence of O2, and argon, whereas it remains the lowest under nitrogen, for 
      which a competitive reaction model has been proposed for its non-exponential 
      decay. Experiments have been also performed at three different pHs, 11.0, 6.3, 
      and 2.0. The significant degradation has been achieved at pH 6.3 under O2 (0.86 x 
      10(-3) s(-1)), which is 1.9 and 4 times higher than acidic (pH 2.0), and basic 
      (pH 11.0) conditions, respectively. The degradation rates have decreased in the 
      order O2 > Ar > air > N2 irrespective of pH.
FAU - Uddin, Helal
AU  - Uddin H
AD  - Department of Applied Physics and Chemistry, University of 
      Electro-Communications, 1-5-1 Chofugaoka, Chofu, Tokyo 182-8585, Japan.
FAU - Hayashi, Shigeo
AU  - Hayashi S
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20090606
PL  - Netherlands
TA  - J Hazard Mater
JT  - Journal of hazardous materials
JID - 9422688
RN  - 0 (Chlorophenols)
RN  - 0 (Gases)
RN  - 0 (Solutions)
RN  - R669TG1950 (2,4-dichlorophenol)
RN  - S88TT14065 (Oxygen)
SB  - IM
MH  - Algorithms
MH  - Chlorophenols/*chemistry/radiation effects
MH  - Chromatography, High Pressure Liquid
MH  - Gases/*chemistry
MH  - Hydrogen-Ion Concentration
MH  - Oxygen/chemistry
MH  - Solutions
MH  - Spectrophotometry, Ultraviolet
MH  - Ultrasonics
EDAT- 2009/06/26 09:00
MHDA- 2009/12/16 06:00
CRDT- 2009/06/26 09:00
PHST- 2009/01/14 00:00 [received]
PHST- 2009/05/25 00:00 [revised]
PHST- 2009/05/25 00:00 [accepted]
PHST- 2009/06/26 09:00 [entrez]
PHST- 2009/06/26 09:00 [pubmed]
PHST- 2009/12/16 06:00 [medline]
AID - S0304-3894(09)00894-2 [pii]
AID - 10.1016/j.jhazmat.2009.05.130 [doi]
PST - ppublish
SO  - J Hazard Mater. 2009 Oct 30;170(2-3):1273-6. doi: 10.1016/j.jhazmat.2009.05.130. 
      Epub 2009 Jun 6.