Persistent organic pollutants in water and surface sediments of Taihu Lake, China and risk assessment

Hai, Wang; Wang, Chunxia; Wu, Wei; Mo, Zhaolan; Wang, Zijian

doi:10.1016/s0045-6535(02)00484-8

Cited by 125 publications

(53 citation statements)

References 5 publications

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“…Algal bloom outbreaks occur frequently as a result of nutrient input and eutrophication in those two lakes and have caused adverse impacts on local residents (Jin et al, 2005). Pollution by other contaminants, such as persistent organic pollutants (POPs), heavy metals, and microcystins have also been previously reported in these lakes (Wang et al, 2003;Zhang et al, 2007;Xu et al, 2008).…”

Section: Occurrence Of Ppcps From Four Lakesmentioning

confidence: 84%

Occurrence of pharmaceuticals and personal care products and associated environmental risks in the central and lower Yangtze river, China

Huang

Witter

et al. 2014

Ecotoxicology and Environmental Safety

147

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Section: Occurrence Of Ppcps From Four Lakesmentioning

confidence: 84%

Occurrence of pharmaceuticals and personal care products and associated environmental risks in the central and lower Yangtze river, China

Huang

Witter

et al. 2014

Ecotoxicology and Environmental Safety

147

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“…Serious blue-green algae water blooms have been frequently occurring in recent years (Zhang and Qin, 2001a). The pollutants in Taihu Lake include nitrogen, phosphorus, heavy metals, some persistent organic pollutants, such as DDT and HCH (Zou et al, 1996;Dai and Sun, 2001;Zhang and Qu, 2001b;Yuan et al, 2002;Wang et al, 2003;Feng et al, 2003). However, study on PCDD/Fs and PCBs in the lake is scarce.…”

Section: Introductionmentioning

confidence: 99%

Polychlorinated dibenzo-p-dioxins/furans and polychlorinated biphenyls in sediments and aquatic organisms from the Taihu Lake, China

Zhang

Jiang

2005

Chemosphere

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Sediments at 16 sites and muscles of four aquatic species collected in Taihu Lake were analyzed for polychlorinated dibenzo-p-dioxins, dibenzofurans (PCDD/Fs) and polychlorinated biphenyls (PCBs) by HRGC/HRMS. The concentrations of total PCDD/Fs, PCBs and WHO-TEQ were 120.1-1315.1 pg/g dw, 889.7-29747.8 pg/g dw, and 0.83-17.72 pg TEQ/g dw, respectively in sediments; and those in muscles were 5.49-35.84 pg/g ww, 1517.10-27647.98 pg/g ww, and 0.52-3.83 pg TEQ/g ww respectively. The concentrations of PCDD/Fs and PCBs in the sediments were decreasing gradually along the water flow. The pollution levels were compared with other studies and the possible sources were discussed.

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“…Besides, Taihu Lake is a typical shallow lake and the sediments are easily re-suspended due to windwave action, leading to a more drastic exchange of pollutants between pore water and overlying water. Many contaminants have been reported in Taihu Lake in recent years (Wang et al 2003;Zhang and Jiang 2005), and most of them just focused on their environmental occurrence or toxicity assessment in the sediments. Limited data were available on the distribution or toxicity of the coexistent contaminants in pore water to understand their environmental bioavailability and fate in the sediment-water system of the lake.…”

Section: Toxicity Of Pahs In Overlying Water and Surface Pore Watermentioning

confidence: 99%

Distribution, diffusive fluxes, and toxicity of heavy metals and PAHs in pore water profiles from the northern bays of Taihu Lake

Lei

Zhang

Shan

et al. 2016

Environ Sci Pollut Res

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Pore water plays a more significant role than do sediments in pollutant cycling dynamics. Also, concentrations of pollutants in pore water provide important information about their bioavailability or eco-toxicity; however, very few studies have focused on this topic. In this study, four duplicate sediment cores from three typical northern bays as well as the central part of Taihu Lake were collected to investigate the distribution, diffusive fluxes, and toxicity of heavy metals and polycyclic aromatic hydrocarbons (PAHs) in pore water profiles, which will be good in understanding the mobility and toxicity of these toxic pollutants and achieving better environmental management. The diffusive fluxes of heavy metals across the sediment-water interface was estimated through Fick's First Law, and the toxicity of heavy metals and PAHs in pore water was assessed by applying a water quality index (interstitial water toxicity criteria unit, IWCTU) and a hazard index (HI), respectively. The average concentrations of Cr, Cu, Ni, Pb, and Zn in surface pore water were 18.8, 23.4, 12.0, 13.5, and 42.5 μg L −1 , respectively. Also, concentrations of the selected heavy metals in both overlying water and pore water from Taihu Lake were all lower than the standard values of the environmental quality standards for surface water. The concentrations as the pore water depth increased, and the highest detected concentrations of heavy metals were recorded between 3 and 5 cm below the sediment surface. The average diffusive fluxes of these metals were 27.3, 24.8, 7.03, 7.81, and −3.32 μg (m 2 day) −1 , respectively, indicating export from sediment into overlying water, with the exception of Zn. There was a potential risk of toxicity, mainly from Pb and Cu, indicating that heavy metals in pore water had slight to moderate impact on sediment-dwelling organisms by values of the IWCTU and the Nemeraw index. The total PAH concentrations in pore water were higher than those in overlying water, and such gradient implies a potential flux of PAHs from pore water to overlying water. The average HI value of PAHs in surface pore water showed no or low ecological risk. While there may be occasional risk due to the HI values in some sites being greater than 1, the dominant contributors were carcinogenic PAHs. Because of their potential biological impact, heavy metals and PAHs and their comprehensive toxic effects in pore water should be given priority attention to keep the safety of Taihu Lake.

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Persistent organic pollutants in water and surface sediments of Taihu Lake, China and risk assessment

Cited by 125 publications

References 5 publications

Occurrence of pharmaceuticals and personal care products and associated environmental risks in the central and lower Yangtze river, China

Occurrence of pharmaceuticals and personal care products and associated environmental risks in the central and lower Yangtze river, China

Polychlorinated dibenzo-p-dioxins/furans and polychlorinated biphenyls in sediments and aquatic organisms from the Taihu Lake, China

Distribution, diffusive fluxes, and toxicity of heavy metals and PAHs in pore water profiles from the northern bays of Taihu Lake

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