PMID- 15504485
OWN - NLM
STAT- MEDLINE
DCOM- 20050324
LR  - 20131121
IS  - 0045-6535 (Print)
IS  - 0045-6535 (Linking)
VI  - 57
IP  - 9
DP  - 2004 Dec
TI  - Effects of humic substances on the decomposition of 2,4-dichlorophenol by ozone 
      after extraction from water into acetic acid through activated carbon.
PG  - 1231-5
AB  - The objectives of this study are to clarify the behavior of humic substances 
      throughout the processes of 2,4-dichlorophenol (2,4-DCP) adsorption on granular 
      activated carbon (GAC) from water and extraction into acetic acid, and the 
      influence of the extracted humic substances on the decomposition of 2,4-DCP by 
      ozone in the acetic acid. The adsorption capacity of GAC for 2,4-DCP was not 
      influenced by the humic substances preloaded to have equilibrium concentration of 
      24.9mg Cl(-1) (14.5mg Cg(-1)). The adsorption capacity of GAC for 2,4-DCP 
      decreased to one tenth of new GAC after the first adsorption-extraction step 
      because of only 16% desorption in the first step. However, 2,4-DCP adsorbed on 
      GAC was completely extracted after the second step suggesting that GAC can be 
      used as adsorbent to transfer 2,4-DCP from water to acetic acid. The 
      concentration ratio of 2,4-DCP from water into acetic acid was around 2x10(5), 
      whereas the concentration ratio of humic substances was about 3.5, indicating 
      that 2,4-DCP was selectively adsorbed and extracted by this system. The first 
      order degradation rate constant for 2,4-DCP by ozone in acetic acid increased 
      with the addition of humic substances. The rate constant with 16mg Cl(-1) of 
      humic substances was 2.6 times as high as that without humic substances. Humic 
      substances behaved as a promoter for the degradation of 2,4-DCP by ozone.
FAU - Okawa, Kiyokazu
AU  - Okawa K
AD  - Department of Material Science and Chemical System Engineering, Graduate School 
      of Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashi-Hiroshima City, 
      Hiroshima 739-8527, Japan. okawa@fukuoka-u.ac.jp
FAU - Nakano, Yoichi
AU  - Nakano Y
FAU - Nishijima, Wataru
AU  - Nishijima W
FAU - Okada, Mitsumasa
AU  - Okada M
LA  - eng
PT  - Comparative Study
PT  - Journal Article
PL  - England
TA  - Chemosphere
JT  - Chemosphere
JID - 0320657
RN  - 0 (Chlorophenols)
RN  - 0 (Humic Substances)
RN  - 059QF0KO0R (Water)
RN  - 16291-96-6 (Charcoal)
RN  - 66H7ZZK23N (Ozone)
RN  - Q40Q9N063P (Acetic Acid)
RN  - R669TG1950 (2,4-dichlorophenol)
SB  - IM
MH  - Acetic Acid/chemistry
MH  - Adsorption
MH  - Charcoal/chemistry
MH  - Chlorophenols/*chemistry
MH  - Chromatography, High Pressure Liquid
MH  - Humic Substances/*analysis
MH  - Kinetics
MH  - Ozone/*chemistry
MH  - Water/chemistry
EDAT- 2004/10/27 09:00
MHDA- 2005/03/25 09:00
CRDT- 2004/10/27 09:00
PHST- 2003/08/26 00:00 [received]
PHST- 2004/07/26 00:00 [revised]
PHST- 2004/08/10 00:00 [accepted]
PHST- 2004/10/27 09:00 [pubmed]
PHST- 2005/03/25 09:00 [medline]
PHST- 2004/10/27 09:00 [entrez]
AID - S0045-6535(04)00686-1 [pii]
AID - 10.1016/j.chemosphere.2004.08.009 [doi]
PST - ppublish
SO  - Chemosphere. 2004 Dec;57(9):1231-5. doi: 10.1016/j.chemosphere.2004.08.009.