Contamination status of dioxins in sediment cores from the Three Gorges Dam area, China

Chen, Lei; Bi, Yonghong; Zhu, Kunfu; Hu, Zhengyu; Zhao, Wenji; Henkelmann, Bernhard; Bernhöft, Silke; Temoka, Cedrique; Schramm, Karl‐Werner

doi:10.1007/s11356-012-1447-2

Cited by 13 publications

(9 citation statements)

References 20 publications

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“…We, therefore, suggest that the concentrations of DEHP in the water of the TGR are not likely to cause adverse effects on fish reproduction. Importantly, concentrations of other contaminants in surface water or sediments in the TGR were also very low (Chen et al, 2013;Ge et al, 2014). For example, concentrations of polycyclic aromatic hydrocarbons, another common pollutant in the TGR, ranged from 13.8 to 97.2 ng/L (Cao et al, 2012;Cui et al, 2009;Wang et al, 2009), while concentrations of other organic pollutants, such as dioxins, organochlorine pesticides, polychlorinated biphenyls, and polybrominated diphenyl ethers, were also very low (<several ng/L) (Chen et al, 2013;Ge et al, 2014;Wang et al, 2009).…”

Section: Environmental Implicationsmentioning

confidence: 99%

The impact of long term exposure to phthalic acid esters on reproduction in Chinese rare minnow (Gobiocypris rarus)

Guo

Yang

Gao

et al. 2015

Environmental Pollution

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Section: Environmental Implicationsmentioning

confidence: 99%

The impact of long term exposure to phthalic acid esters on reproduction in Chinese rare minnow (Gobiocypris rarus)

Guo

Yang

Gao

et al. 2015

Environmental Pollution

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“…Generally, the concentrations of organic pollutants were found to increase from the remote west to the industrialized east (Liu et al 2011). In TGR, there are few studies on organic pollutants focusing mainly on PAH, PCB, organochlorine pesticides (OCP), phthalate acid esters, and polychlorinated dibenzodioxins and dibenzofurans (Gao et al 2007;Chen et al 2008;Cui et al 2009;Wang et al 2009;Luo et al 2011;Wang et al 2012;Liu et al 2011;So et al 2007;Chen et al 2013). Higher levels of OCP, PAH, and PCB were found close to Chongqing City and near TGD, possibly attributed to local anthropogenic sources (Wang et al 2009;Liu et al 2011).…”

mentioning

confidence: 99%

Occurrence and distribution of organic trace substances in waters from the Three Gorges Reservoir, China

Wolf

Bergmann

Wilken

et al. 2013

Environ Sci Pollut Res

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This study deals with the evaluation of water quality of the Three Gorges Reservoir (TGR) in order to assess its suitability as a raw water source for drinking water production. Therefore, water samples from (1) surface water, (2) tap water, and (3) wastewater treatment plant effluents were taken randomly by 2011-2012 in the area of the TGR and were analyzed for seven different organic contaminant groups (207 substances in total), applying nine different analytical methods. In the three sampled water sources, typical contaminant patterns were found, i.e., pesticides and polycyclic aromatic hydrocarbons (PAH) in surface water with concentrations of 0.020-3.5 μg/L and 0.004-0.12 μg/L, disinfection by-products in tap water with concentrations of 0.050-79 μg/L, and pharmaceuticals in wastewater treatment plant effluents with concentrations of 0.020-0.76 μg/L, respectively. The most frequently detected organic compounds in surface water (45 positives out of 57 samples) were the pyridine pesticides clopyralid and picloram. The concentrations might indicate that they are used on a regular basis and in conjunction in the area of the TGR. Three-and four-ring PAH were ubiquitously distributed, while the poorly soluble five-and six-ring members, perfluorinated compounds, polychlorinated biphenyls, and polybrominated diphenyl ethers, were below the detection limit. In general, the detected concentrations in TGR are in the same range or even lower compared to surface waters in western industrialized countries, although contaminant loads can still be high due to a high discharge. With the exception of the two pesticides, clopyralid and picloram, concentrations of the investigated organic pollutants in TGR meet the limits of the Chinese Standards for Drinking Water Quality GB 5749 (Ministry of Health of China and Standardization Administration of China 2006) and the European Union (EU) Council Directive 98/83/EC on the quality of water intended for human consumption (The Council of the European Union 1998), or rather, the EU Directive on environmental quality standards in the field of water policy (The European Parliament and The Council of the European Union 2008). Therefore, the suggested use of surface water from TGR for drinking water purposes is a valid option. Current treatment methods, however, do not seem to be efficient since organic pollutants were detected in significant concentrations in purified tap water.

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“…), and polycyclic aromatic hydrocarbons (PAHs). From chemical data (Chen et al 2013) (Table S1), the chem-TEQs contributed by TCDD/F congeners ranged between 0.41 and 0.79 pg TCDD g −1 dw, that by PCB ranged between 0.002 and 0.04 pg TCDD g −1 dw, and that by PAH ranged between 1.26 and 3.96 pg TCDD g −1 dw. It appears that the calculated chem-TEQs were mainly contributed by dioxin-like PAHs.…”

Section: Erod Activity Of Samplesmentioning

confidence: 99%

Aryl hydrocarbon receptor (AhR) inducers and estrogen receptor (ER) activities in surface sediments of Three Gorges Reservoir, China evaluated with in vitro cell bioassays

Wang

Bovee²,

et al. 2013

Environ Sci Pollut Res

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Two types of biological tests were employed for monitoring the toxicological profile of sediment cores in the Three Gorges Reservoir (TGR), China. In the present study, sediments collected in June 2010 from TGR were analyzed for estrogen receptor (ER)-and aryl hydrocarbon receptor (AhR)-mediated activities. The estrogenic activity was assessed using a rapid yeast estrogen bioassay, based on the expression of a green fluorescent reporter protein. Weak anti-estrogenic activity was detected in sediments from an area close to the dam of the reservoir, and weak estrogenic activities ranging from 0.3 to 1 ng 17β-estradiol (E2) equivalents (EQ) g −1 dry weight sediment (dw) were detected in sediments from the Wanzhou to Guojiaba areas. In the upstream areas Wanzhou and Wushan, sediments demonstrated additive effects in coadministration of 1 nM E2 in the yeast test system, while sediments from the downstream Badong and Guojiaba areas showed estrogenic activities which seemed to be more than additive (synergistic activity). There was an increasing tendency in estrogenic activity from upstream of TGR to downstream, while this tendency terminated and converted into anti-estrogenic activity in the area close to the dam. The AhR activity was detected employing rat hepatoma cell line (H4IIE). EROD activities were found homogenously distributed in sediments in TGR ranging from 200 to 311 pg 2,3,7,8-tetrachlorodibenzo-p -dioxin (TCDD) EQ g −1 dw for total AhR agonists and from 45 to 76 pg TCDD EQ g −1 dw for more persistent AhR agonists. The known AhR agonists polycyclic aromatic hydrocarbon, polychlorinated biphenyl, and PCDD/F only explained up to 8 % of the more persistent AhR agonist activity in the samples, which suggests that unidentified AhR-active compounds represented a great proportion of the TCDD EQ in sediments from TGR. These findings of estrogenic potential and dioxin-like activity in TGR sediments provide possible weight-of-evidence of potential ecotoxicological causes for the declines in fish populations which have been observed during the past decades in TGR.

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Contamination status of dioxins in sediment cores from the Three Gorges Dam area, China

Cited by 13 publications

References 20 publications

The impact of long term exposure to phthalic acid esters on reproduction in Chinese rare minnow (Gobiocypris rarus)

The impact of long term exposure to phthalic acid esters on reproduction in Chinese rare minnow (Gobiocypris rarus)

Occurrence and distribution of organic trace substances in waters from the Three Gorges Reservoir, China

Aryl hydrocarbon receptor (AhR) inducers and estrogen receptor (ER) activities in surface sediments of Three Gorges Reservoir, China evaluated with in vitro cell bioassays

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