Risks posed by trace organic contaminants in coastal sediments in the Pearl River Delta, China

Perfluoroalkyl substances and organochlorine pesticides in sediments from Huaihe watershed in China

“…Mean concentrations of HCHs, DDTs and HCB were 5.62 ± 4.35 ng/g dw, 2.43 ± 3.12 ng/g dw and 1.55 ± 4.17 ng/g dw, respectively (Table 2). When compared with other six major rivers in China, concentrations of OCPs in sediments of the Huaihe River were generally moderate and lower than those in sediments from the Daliao , Haihe (Yang et al, 2005), Yangtze (Liu et al, 2008) and Pearl Rivers (Fung et al, 2005), but higher than concentrations in sediments from the Songhua (He et al, 2008) and Yellow Rivers . Considering that agriculture is the primary source of OCPs, variation in concentrations in sediments among these rivers is mainly a result of regional differences in crops (Li et al, 2001).…”

A review of environmental and human exposure to persistent organic pollutants in the Pearl River Delta, South China

“…The highest mean concentration (130 ng/g) was found in coastal sediment of the PRD (Fung et al, 2005), while the lowest one (0.18 ng/g) was detected in fishpond sediment in Shunde (Zhang et al, 2011a). Levels of HCHs in sediment cores from the coast of Hong Kong and Macao Estuary revealed a peak around the year of 1990(1992and 1987in Hong Kong, and 1993 in the Macao Estuary) and a downtrend in recent years Wei et al, 2008), indicating a reduction in the HCH usage recently.…”

“…Daya Bay ; 6. The Coast of the Pearl River Delta (Fung et al, 2005); 7. Fishing Harbor in the Pearl River Delta ); 8.…”

Hexachlorobenzene sources, levels and human exposure in the environment of China

“…HCB concentrations in Taihu Lake were higher than those in most of rivers because of industrial discharge to the Lake (Yuan et al, 2003). HCB concentrations in the coastal sediments in the Pearl River Delta were much higher than those in the Pearl River estuary (Fung et al, 2005;Wei et al, 2007a).…”