title: Organic diagenesis in sediment and its impact on the adsorption of bisphenol A and nonylphenol onto marine sediment.
abstract: 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, Kd, decreased whereas the organic normalized partition coefficient, Koc, more than doubled. The experiments with NP show an even greater increase in Koc. 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.
authors.affiliation: Environmental Engineering Research Centre, Department of Civil Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong, China.
authors.forename: Ying-heng
authors.initials: YH
authors.lastname: Fei
authors.forename: Xiang-dong
authors.initials: XD
authors.lastname: Li
authors.forename: Xiao-yan
authors.initials: XY
authors.lastname: Li
mesh_terms: D000327:Adsorption; D001559:Benzhydryl Compounds; D004784:Environmental Monitoring; D019015:Geologic Sediments / Q000737:chemistry*; D010636:Phenols / Q000032:analysis / Q000737:chemistry*; D012623:Seawater / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000032:analysis / Q000737:chemistry*; D000098826:Bisphenol A Compounds
chemical_list: D001559:Benzhydryl Compounds; D010636:Phenols; D014874:Water Pollutants, Chemical; C025256:nonylphenol; C006780:bisphenol A; D000098826:Bisphenol A Compounds