Organic diagenesis in sediment and its impact on the adsorption of bisphenol A and nonylphenol onto marine sediment

MARINE POLLUTION BULLETIN

卷:63

Article

Fei, Ying-heng¹  Li, Xiang-dong²  Li, Xiao-yan¹ 

[1] Univ Hong Kong, Environm Engn Res Ctr, Dept Civil Engn, Hong Kong, Hong Kong, Peoples R China

[2] Hong Kong Polytech Univ, Dept Civil & Struct Engn, Kowloon, Hong Kong, Peoples R China

关键词: Adsorption;    Diagenesis;    EDCs;    Organic matter;    Sediment;    Marine water quality;   

DOI  :  10.1016/j.marpolbul.2010.11.020

来源: Elsevier

【 摘 要 】

Hydrophobic organic contaminants in marine water are mostly adsorbed onto (partitioned into) sediment organic matter (SOM). To study the impact of SOM diagenesis on sediment adsorption properties, artificial sediment with rich SOM content was incubated for more than 120 days. The sediment was sampled every week, and batch sediment adsorption tests were conducted with bisphenol A (BPA) and nonylphenol (NP) as the model pollutants. The results show that the amount of organic matter loaded in the sediment decreased by nearly 80% during incubation. For the incubated sediment, the BPA partition coefficient, K-d, decreased whereas the organic normalized partition coefficient, K-oc, more than doubled. The experiments with NP show an even greater increase in K-oc Organic matter diagenesis shows a profound effect on the adsorption behavior of sediment, as the SOM residue has an increasing affinity and partition capacity for organic contaminants. (C) 2010 Elsevier Ltd. All rights reserved.

【 授权许可】

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