PMID- 16157174
OWN - NLM
STAT- MEDLINE
DCOM- 20051114
LR  - 20121115
IS  - 0045-6535 (Print)
IS  - 0045-6535 (Linking)
VI  - 61
IP  - 1
DP  - 2005 Sep
TI  - Correlations of nonlinear sorption of organic solutes with soil/sediment 
      physicochemical properties.
PG  - 116-28
AB  - The estimation of solute sorptive behaviors is essential when direct sorption 
      data are unavailable and will provide a convenient way to assess the fate and the 
      biological activity of organic solutes in soil/sediment environments. In this 
      study, the sorption of 2,4-dichlorophenol (2,4-DCP) on 19 soil/sediment samples 
      and the sorption of 13 organic solutes on one sediment were investigated. All 
      sorption isotherms are nonlinear and can be described satisfactorily by a simple 
      dual-mode model (DMM): q(e)=KpCe+Q0 . bCe/(1+bCe), where Kp (mlg(-1)) is the 
      partition coefficient; Ce (microgml(-1)) is the equilibrium concentration; Q0 
      (microgg(-1)) is the maximum adsorption capacity; Q0 . b (mlg(-1)) is the 
      Langmuir-type isotherm slope in the low concentration (Henry's law) range and b 
      (mlmicrog(-1)) is a constant related to the affinity of the surface for the 
      solute. Based on these nonlinear sorption isotherms and similar other nonlinear 
      isotherms, it is observed that, for both polar 2,4-DCP and nonpolar phenanthrene, 
      Kp, Q0 and Q0 . b are linearly correlated with soil/sediment organic carbon 
      content (f(oc) in the range of 0.118-53.7%). The results indicate that the 
      nonlinear sorption of organic solutes results primarily from interactions with 
      soil/sediment organic matter. The K*oc K*oc=Kp/f(oc)), Qoc (Qoc=Q0/f(oc)), Loc 
      (Loc=Q0 . b/f(oc)) and b for a given organic solute with different 
      soils/sediments are largely invariant. Furthermore, logK*oc, logb and logLoc for 
      various organic solutes are correlated significantly with the solute logKow or 
      logSw (logKow in the range of 0.9 to 5.13 and logSw in the range of -6.176 to 
      -0.070). A fundamental empirical equation was then established to calculate 
      approximately the nonlinear sorption from soil/sediment f(oc) and solute Sw for a 
      given solute equilibrium concentration.
FAU - Yang, Kun
AU  - Yang K
AD  - Department of Environmental Science, Xixi Campus, Zhejiang University, Hangzhou 
      310028, China.
FAU - Zhu, Lizhong
AU  - Zhu L
FAU - Lou, Baofeng
AU  - Lou B
FAU - Chen, Baoliang
AU  - Chen B
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20050420
PL  - England
TA  - Chemosphere
JT  - Chemosphere
JID - 0320657
RN  - 0 (Anthelmintics)
RN  - 0 (Chlorophenols)
RN  - 0 (Soil Pollutants)
RN  - R669TG1950 (2,4-dichlorophenol)
SB  - IM
MH  - Adsorption
MH  - Anthelmintics/*chemistry
MH  - Chlorophenols/*chemistry
MH  - Geologic Sediments/chemistry
MH  - Models, Theoretical
MH  - Soil Pollutants/*analysis
MH  - Temperature
EDAT- 2005/09/15 09:00
MHDA- 2005/11/15 09:00
CRDT- 2005/09/15 09:00
PHST- 2004/09/29 00:00 [received]
PHST- 2005/02/20 00:00 [revised]
PHST- 2005/02/27 00:00 [accepted]
PHST- 2005/09/15 09:00 [pubmed]
PHST- 2005/11/15 09:00 [medline]
PHST- 2005/09/15 09:00 [entrez]
AID - S0045-6535(05)00389-9 [pii]
AID - 10.1016/j.chemosphere.2005.02.095 [doi]
PST - ppublish
SO  - Chemosphere. 2005 Sep;61(1):116-28. doi: 10.1016/j.chemosphere.2005.02.095. Epub 
      2005 Apr 20.