Evaluation of dissipation mechanisms by Lolium perenne L, and Raphanus sativus for pentachlorophenol (PCP) in copper co-contaminated soil

The Science of the Total Environment
Qi LinYingxu Chen

Abstract

Though phytoremediation is widely studied in remediation of metal contaminated soils or organic contaminated soils, little information is available regarding the effectiveness and processes of phytoremediation of sites co-contaminated with organic and metal pollutants. Sites co-contaminated with organic and metal pollutants are common and considered to be a more complex problem as the two components often cause a synergistic effect on cytotoxicity as measured both by growth inhibition and colony-forming ability. In this paper, the dissipation mechanisms for pentachlorophenol (PCP) in copper co-contaminated soil by Lolium perenne L, and Raphanus sativus was investigated in a greenhouse experiment by monitoring the growth response of plants, evaluating the removal efficiency of extractable PCP, differentiating PCP residuals in strongly and loosely adhering rhizosphere soils, and analyzing the microbial activity in the rhizosphere. In copper co-contaminated soil with the initial PCP concentration of 50 mg/kg, plants grew better with the increment of soil Cu level (0, 150, 300 mg/kg), which implied that combinations of inorganic and organic pollutants sometimes exerted antagonistic effects on plant cytotoxicity. The observed higher...Continue Reading

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Aug 1, 2013·Environmental Science and Pollution Research International·Nejla HechmiNaceur Jedidi
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Jan 5, 2014·Environmental Science & Technology·Mang LuXue-Jiao Wu

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