PMID- 17719174
OWN - NLM
STAT- MEDLINE
DCOM- 20080702
LR  - 20121115
IS  - 0304-3894 (Print)
IS  - 0304-3894 (Linking)
VI  - 152
IP  - 2
DP  - 2008 Apr 1
TI  - Removal of 2,4,6-trichlorophenol from a solution by humic acids repeatedly 
      extracted from a peat soil.
PG  - 812-9
AB  - Humic acid (HA) is one of the major components of soil organic matter. It 
      strongly affects the sorption behavior of organic and inorganic contaminants in 
      soils. To obtain a better understanding of the interactions of contaminants with 
      HA, a repeated extraction technique has been applied to a peat soil to obtain HA 
      fractions with varying aliphaticity and aromaticity, which were subsequently 
      correlated to the sorption properties of 2,4,6-trichlorophenol (TCP). HA 
      fractions were extracted repeatedly using an alkaline solution and each HA 
      fraction was separated into two portions with an air-drying or re-suspending 
      (denoted as RSHAs) process. Solid-state (13)C NMR and elemental analysis 
      demonstrated that the aromaticity and polarity of HAs decreased with extractions. 
      Kinetic results indicated that air-dried HAs exhibited two-step first order 
      sorption behavior with a rapid stage followed by a slower stage. The slower 
      sorption is attributed to the diffusion of 2,4,6-TCP in the condensed aromatic 
      domains of HAs. Conversely, sorption of 2,4,6-TCP on RSHAs was extremely rapid 
      and could not be fitted with any kinetic model. For air-dried HAs the sorption 
      capacity (K(oc)) was weakly correlated with the chemical compositions of HAs. 
      However, a positive trend between K(oc) and aromaticity was observed for RSHAs. 
      Compared with the results of air-dried HAs with their counterparts of RSHAs, it 
      is therefore concluded that air-drying may alter the structure of HAs through 
      artificially creating a more condensed domain in HAs. The structural alternation 
      may result in an incorrect interpretation of the relationship between sorption 
      capacity and chemical composition of HAs and a misjudgment of the transport 
      behavior of 2,4,6-TCP in soils and sediments.
FAU - Tzou, Yu-Min
AU  - Tzou YM
AD  - Department of Soil & Environmental Sciences, National Chung Hsing University, 
      Taichung 40227, Taiwan. ymtzou@dragon.nchu.edu.tw
FAU - Wang, Shan-Li
AU  - Wang SL
FAU - Liu, Jen-Chyi
AU  - Liu JC
FAU - Huang, Ying-Ying
AU  - Huang YY
FAU - Chen, Jen-Hshuan
AU  - Chen JH
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20070720
PL  - Netherlands
TA  - J Hazard Mater
JT  - Journal of hazardous materials
JID - 9422688
RN  - 0 (Chlorophenols)
RN  - 0 (Humic Substances)
RN  - 0 (Soil Pollutants)
RN  - MHS8C5BAUZ (2,4,6-trichlorophenol)
SB  - IM
MH  - Adsorption
MH  - Chlorophenols/*isolation & purification
MH  - *Humic Substances
MH  - Soil Pollutants/*isolation & purification
EDAT- 2007/08/28 09:00
MHDA- 2008/07/03 09:00
CRDT- 2007/08/28 09:00
PHST- 2007/06/14 00:00 [received]
PHST- 2007/07/17 00:00 [revised]
PHST- 2007/07/17 00:00 [accepted]
PHST- 2007/08/28 09:00 [pubmed]
PHST- 2008/07/03 09:00 [medline]
PHST- 2007/08/28 09:00 [entrez]
AID - S0304-3894(07)01079-5 [pii]
AID - 10.1016/j.jhazmat.2007.07.047 [doi]
PST - ppublish
SO  - J Hazard Mater. 2008 Apr 1;152(2):812-9. doi: 10.1016/j.jhazmat.2007.07.047. Epub 
      2007 Jul 20.