Influence of organic amendments on the sorption of pentachlorophenol on soils
LI Ruijuan , WEN Bei , ZHANG Shuzhen , PEI Zhiguo , SHAN Xiaoquan
DOI:
Received April 22, 2008,Revised May 28, 2008, Accepted , Available online
Volume 21,2009,Pages 474-480
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The influence of pH on the sorption of pentachlorophenol (PCP) onto three organic amendments, char, humic acid (HA) and peat,
and the e ect of organic amendments on PCP sorption to three kinds of soils were evaluated. The sorption of PCP on these sorbents
fitted the Freundlich model well, suggesting that PCP sorption isotherms were nonlinear with exponential coe cient (N) value lower
than 1. The PCP sorption capacity on three organic amendments and the N values increased with decreasing pH. The sorption capacities
were in the order: char > HA > peat. Organic amendments resulted in an enhancement of sorption capacities of soils. The N values
of PCP sorption on soils were decreased by char amendment and increased by HA and peat amendments. This study demonstrated
that application of traditional organic amendments led to the enhancement of PCP sorption by soils. This information may aid both in
predicting environmental fates of hydrophobic ionizable organic compounds and in developing remediation strategies for them.
