Trace organic contamination in biota collected from the Pearl River Estuary, China: A preliminary risk assessment

Wei, Si; Lau, Ridge K.F.; Fung, C.N.; Zheng, Gene J.; Lam, James C.W.; Connell, Des; Fang, Zhanqiang; Richardson, Bruce J.; Lam, Paul K.S.

doi:10.1016/j.marpolbul.2006.06.009

Cited by 49 publications

(21 citation statements)

References 33 publications

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“…When the RQ worst for a certain pollutant is lower than 1, adverse effects of exposure are likely to be minimal. Thus, RQ best [ 1 or RQ worst \ 1 could be useful information to inform regulators of potential risk in the absence of a more refined risk assessment (Wei et al 2006).…”

Section: Calculation Of Risk Quotients For Each Pollutantmentioning

confidence: 99%

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Semi-volatile organic compounds and trace elements in the Yangtze River source of drinking water

Zhang

et al. 2009

Ecotoxicology

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Determination of 24 semi-volatile organic compounds (SVOCs) and 24 trace elements in water samples was conducted in order to investigate the quality of the Nanjing source of drinking water taken from Yangtze River. The total concentrations of SVOCs and trace elements were in the range of 1,951-11,098 ng/l and 51,274-72,384 microg/l, respectively. No significant seasonal changes were found for the pollutants' concentrations. A primary health risk assessment was carried out to evaluate potential health effects. Risk quotients involving carcinogenic effects for benzo(a)anthracene, benzo(a)pyrene, benzo(b)fluoranthene, dibenz(a,h)anthracene, bis(2-ethylhexyl)phthalate and arsenic were >1 under the worst-case scenario. The results of this study demonstrate the importance of further studies on the environmental health effects of exposure to the source water.

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Section: Calculation Of Risk Quotients For Each Pollutantmentioning

confidence: 99%

“…The risk-based concentration for pollutants from the USEPA documents makes specific assumptions that may not be completely applicable to the Chinese population (Wei et al 2006); 2. Possible interactions amongst chemicals in Yangtze River water may change the toxicity of an individual contaminant (George et al 2003).…”

Section: Analysis Of Risk Quotientsmentioning

confidence: 99%

Semi-volatile organic compounds and trace elements in the Yangtze River source of drinking water

Zhang

et al. 2009

Ecotoxicology

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“…These studies focused on eastern China. In all the studies, the estimated daily intakes of HCB were much lower than Canadian tolerable daily intake (270 ng/kg body weight/day), indicating that the intakes would not pose a health risk in China at the present (Nakata et al, 2002;Wei et al, 2006;Yang et al, 2006; …”

Section: Hcb Residues In Food and Human Exposurementioning

confidence: 91%

“…HCB concentrations in bivalves collected from Pearl River Estuary were comparatively low, except for HCB levels in bivalves from one site (26.8 and 14.9 ng/g dry wt.) (Wei et al, 2006). Almost all of the shrimp samples had extremely low levels of HCB (<0.5 ng/g dry wt.…”

Section: Fish and Shellfishmentioning

confidence: 95%

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

Guang

Lü

Han

et al. 2010

Environment International

106

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a b s t r a c t a r t i c l e i n f oThis article summarizes the published scientific data on sources, levels and human exposure of hexachlorobenzene (HCB) in China. Potential sources of unintended HCB emission were assessed by production information, emission factors and environmental policies. HCB was observed in various environmental compartments in China. HCB levels increased from South China to North China in most of environmental compartments (air, soil and mussel). Some hotspots were identified near the factories producing and using HCB. In terms of spatial distribution, HCB concentrations in air and shellfish showed much variation, which indicated some primary emission sources in China. HCB levels in air and human milk in China were relatively higher than those in other countries, but HCB levels in other compartments were similar to those in Europe and other countries in Eastern Asia. In the limited studies on temporal trends of HCB levels in China, HCB concentrations in air, sediment, fish and human milk did not show a consistent downward trend. Although HCB levels in food and human milk does not pose a health risk in China at present, long-term exposure to HCB should not be overlooked.

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“…We must note that the methods adopted in this study have some inherent uncertainties, as has been emphasized by the USEPA and other documents (Wei et al, 2006). First, the exposure parameters employed in this study were taken from the USEPA and WHO, which might not be specific to Chinese situations.…”

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confidence: 99%

Metals contamination along the watershed and estuarine areas of southern Bohai Sea, China

Wang

et al. 2013

Marine Pollution Bulletin

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a b s t r a c tDistributions and magnitude of metals in water, sediment and soil collected from the watershed and estuarine areas of southern Bohai Sea, were investigated. The largest dissolved concentrations of As, Cu and Zn in water were 347.70, 2755.00, 2076.00 lg/L, respectively, much higher than corresponding drinking water guidelines. The greatest concentrations of Cu, Zn, Cr, Ni, Pb, As and Cd in sediments were 1462.2, 1602.17, 196.43, 67.15, 63.54, 73.86 and 1.41 mg/kg, dw, respectively. The mean concentrations of Cu, Ni, Cd, Zn, Cr, Pb and As in soils were 24.67, 24.73, 0.14, 64.75, 56.52, 25.12 and 9.34 mg/kg, dw, respectively. Land use was confirmed to be an important factor of influence on soil metal concentrations. Metal contents along the watershed of Jie River were significantly greater than in other locations. The detection of metals in relatively high concentrations from different environmental matrices in this region indicates the necessity of further studies.Ó 2013 Elsevier Ltd. All rights reserved.In the past few decades, metals contamination in the environment has been attracting increasing concern around the world due to their toxicity, persistence and bioaccumulation characteristics (Cheng, 2003;Davis and Atkins, 2001). Unlike organic pollutants which can be degraded to less harmful components by biological or chemical processes, metals are considered as not naturally decomposable. The environmental metal concentrations are influenced by both natural and anthropogenic factors including parent materials, industrial and domestic sewage discharges, mining, smelting, e-wastes recycling (Xu et al., 2011). China is currently the worlds' second largest economy as a result of rapid industrial development over the past few decades. However, this rapid economic growth has been accompanied by considerable environmental side effects, especially pollution by metals. Coastal and estuarine areas are among the most important places for human inhabitants, yet they are often the ultimate receptacles of pollutants (Pan and Wang, 2012). The distribution and contamination levels of metals in the watershed, estuaries, coastal, bay and sea environments in China have been extensively investigated (Gao and Chen, 2012;Ip et al., 2007;Zhang et al., 2009).The Bohai Sea is a nearly enclosed interior sea located in northeast China and consists of Liaodong Bay, Bohai Bay, Laizhou Bay, and the middle sea (Meng et al., 2008). Due to intensive urbanization and industrialization, Bohai Sea and nearby coastal areas and estuaries have severe metal pollution problems (Wang et al., 2011b). Particularly, its proximity to Beijing, the capital of China, makes it one of the busiest seaways in the world . Large amounts of metals are carried into this sea through either direct discharges or loads from rivers, such as the Yellow River, Liaohe River and Xiaoqing River. For example, the Liaohe River discharged 390 t of metals into the sea in 2002, and the Yellow River totally discharged 200 t of metals in 2003 (Wang andWang, 2007). The...

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Trace organic contamination in biota collected from the Pearl River Estuary, China: A preliminary risk assessment

Cited by 49 publications

References 33 publications

Semi-volatile organic compounds and trace elements in the Yangtze River source of drinking water

Semi-volatile organic compounds and trace elements in the Yangtze River source of drinking water

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

Metals contamination along the watershed and estuarine areas of southern Bohai Sea, China

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