Distribution and Bioconcentration of Polycyclic Aromatic Hydrocarbons in Surface Water and Fishes

Author:

Li Haiyan12,Ran Yong1

Affiliation:

1. State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Wushan, Guangzhou 510640, China

2. University of Chinese Academy of Sciences, Beijing 100049, China

Abstract

To examine spatial distribution and bioconcentration of PAHs, water and fish samples were collected from Pearl River Delta in summer and spring, respectively. Particulate organic carbon, dissolved organic carbon, biodegradable DOC (BDOC), and chlorophyll a were measured. PAHs were dominated by 2- and 3-ring compounds in the water and SPM samples. Aqueous and solid-phase PAHs, respectively, showed significant correlations with total organic matter (TOC) in SPM or dissolved organic matter (DOC) in the water. The in-situ partitioning coefficients (logKoc, mL/g) for the samples were observed to be related tologKow, implying that the hydrophobicity of PAHs is a critical factor in their distribution. It was also observed that BCF increased with the increasingKowin the viscera of tilapia (logBCF=0.507logKow1.368,r=0.883). However, most of the observed log BCF values in other different fish tissues at first increased with the increasing of logKow, then reached a maximum value whenlogKowis between 5 and 7, and then decreased whenlogKowis higher than 7, indicating that the value of BCF may vary due to the diversity of fish species.

Funder

National Natural Science Foundation of China

Publisher

Hindawi Limited

Subject

General Environmental Science,General Biochemistry, Genetics and Molecular Biology,General Medicine

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