Polychlorinated Biphenyls in Surface Sediments from the Pearl River Delta and Macau

Characterization of transboundary POP contamination in aquatic ecosystems of Pearl River delta

“…In general, the observed concentrations of PCB in the sediment samples are low with the range from 10 to 486 ng/g (Hong et al, 1999;Kang et al, 2000). The PCB congeners identified are principally moderately-chlorinated biphenyls, i.e., tetra-to hepta-chlorinated, rather than lower chlorinated congeners.…”

“…It will serve as an assessment of the current status, distribution, severity, fate, and environmental consequence of detected contaminants, thus furnishing possible insight as well as future directions for global and strategic environmental management of the region. Table 1 shows a summary of concentrations of various POPs in different carrying media of Pearl River delta from existing literature (Cheng et al, 2000;Fang et al, 2001;Fu et al, 2001;Hong et al, 1999;Kang et al, 2000;Mai et al, 2001;Wu et al, 1999;Yuan et al, 2001;Zheng et al, 2001;Zhou et al, 2001). Owing to the apparent significance of sediment phase in the fate and transport of contaminants, previous research efforts have mainly been focused on surficial sediments in assessing the pollution of water bodies.…”

Persistent organic pollution characterization of sediments in Pearl River estuary

“…From the measured data, the observed concentrations of PCB in the sediment samples, ranging from 10 to 486 ng/g, are not excessively high Kang et al 2000). It might be easily concluded that PCBs are neither major contaminants nor a major environmental threat in most of the Pearl River delta area.…”

“…Isolated research efforts have been performed on surficial sediments in assessing the pollution of water bodies. Current concentrations of various POPs in sediments of Pearl River delta can be gleaned from the literature Hong et al 1999;Kang et al 2000;Mai et al 2001;Wu et al 1999;Yuan et al 2001;Zheng et al 2001). …”

PCB contamination in soils of the Pearl River Delta, South China: levels, sources, and potential risks

“…PCB contamination in the Pearl River Delta (PRD) region was mainly concentrated in the sediment and water (Kang et al 2000;Mai et al 2005;Yang et al 1997). However, no study has focused on soil contamination, although soil has been assumed to represent a major source of the PCB contamination of local water bodies (Mai et al 2005).…”