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[Effects of overlying water properties on sorption of organic pollutants in sediments].

Hualin Chen, Yingxu Chen, Yuntai Xu, Mengwei Shen

Abstract

By the method of orthogonal experiment, this paper studied the effects of overlying water temperature, pH, ionic strength, and dissolved organic carbon (DOC) on the sorption of phenanthrene and pentachlorophenol (PCP) in sediments. The results showed that temperature was the main factor affecting the sorption behavior of phenanthrene, with the trend of partition coefficient (Kd) decreased with temperature. For PCP, its Kd was the smallest at 20 degrees C, and its sorption was decreased with pH. The DOC content of overlying water slightly decreased the Kd of phenanthrene and PCP, and ionic strength only increased the Kd of PCP slightly. The sorption capacity of organic pollutants in sediment was mainly determined by the properties of organic pollutants and sediments.

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Available abstract

Key concepts: Sorption, Pentachlorophenol, Phenanthrene, Partition coefficient, Chemistry, Environmental chemistry, Pollutant, Ionic strength