Trophic transfer of mercury and methylmercury in an aquatic ecosystem impacted by municipal sewage effluents in Beijing, China

Fu, Jianjie; Wang, Yawei; Zhou, Qunfang; Jiang, Guibin

doi:10.1016/s1001-0742(09)60237-0

Cited by 10 publications

(3 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These results indicate that SCCPs, especially for those dominant congeners, could biomagnify through trophic levels in this investigated aquatic food web. Similar biomagnification trends for OCPs and methyl mercury in aquatic food webs have also been found in the Gaobeidian Lake. , However, no obvious biomagnification of PBDEs and PCBs in the same food web was observed in our previous work . This might be due to the fact that biomagnification processes can be different for different contaminants, which can be affected by numerous factors such as biodegradation, biotransformation, depuration rate, food habits, structure of food web, chemical properties, and even environmental parameters such as water temperature and suspended particles. , …”

Section: Resultssupporting

confidence: 70%

Distribution and Trophic Transfer of Short-Chain Chlorinated Paraffins in an Aquatic Ecosystem Receiving Effluents from a Sewage Treatment Plant

Zeng

Wang

et al. 2011

Environ. Sci. Technol.

Self Cite

153

126

View full text Add to dashboard Cite

Short-chain chlorinated paraffins (SCCPs) are an extremely complex group of industrial chemicals and found to be potential persistent organic pollutants (POPs), and thus have attracted extensive concern worldwide. In this study, influent, effluent, and sludge were collected from a large sewage treatment plant (STP) in Beijing, China. Water, sediment, and aquatic species were also collected from a recipient lake that receives effluents discharged from the STP. These samples were then analyzed to investigate the effect of STP effluent on distribution and trophic transfer of SCCPs in the local aquatic ecosystem. Concentrations of total SCCPs (ΣSCCPs) in lake water and surface sediments were found in the range 162-176 ng/L and 1.1-8.7 μg/g (dry weight, dw), respectively. Vertical concentration profiles of sediment cores showed ΣSCCPs decreased exponentially with increasing depth. Specific congener composition analysis in sediment layers indicated possible in situ biodegradation might be occurring. High bioaccumulation of SCCPs was observed in the sampled aquatic species. The bioaccumulation factor (BAF) generally increased with the number of chlorines in the SCCP congeners. A significantly positive correlation between lipid-normalized ΣSCCPs concentration and trophic levels (R(2) = 0.65, p < 0.05) indicate that SCCPs can biomagnify through the food chain in the effluent-receiving aquatic ecosystem.

show abstract

Section: Resultssupporting

confidence: 70%

Distribution and Trophic Transfer of Short-Chain Chlorinated Paraffins in an Aquatic Ecosystem Receiving Effluents from a Sewage Treatment Plant

Zeng

Wang

et al. 2011

Environ. Sci. Technol.

Self Cite

153

126

View full text Add to dashboard Cite

show abstract

“…The aquatic medium is one of the best places where Hg is converted by sulfate-reducing bacteria [ 8 ] into an organic form called methylmercury (MeHg), a highly neurotoxic compound [ 9 ]. In addition, MeHg has bioaccumulation capacity in the biota, as well as biomagnification capacity across the food chain [ 3 , 10 , 11 , 12 , 13 ] and its concentration increases many fold in top predators compared to the ambient waters. Therefore, top predator fishes generally have very high concentrations of MeHg in their bodies [ 13 ].…”

Section: Introductionmentioning

confidence: 99%

The Risk of Mercury Exposure to the People Consuming Fish from Lake Phewa, Nepal

Thapa

Sharma

Kang

et al. 2014

IJERPH

View full text Add to dashboard Cite

The risk of mercury exposure through consumption of fish from Lake Phewa, Nepal was investigated. A total of 170 people were surveyed to know their fish consumption levels. The weekly mercury (Hg) intake in the form of methylmercury (MeHg) through fish was calculated by using the data on average MeHg concentrations in fish, the average consumption of fish per week, and an average body weight of the people. Hotel owners were consuming significantly high amounts of fish, followed by fishermen, in comparison to the government staff, army/police, locals and others (visitors). Some individuals exceeded the Provisional Tolerable Weekly Intake (PTWI) of 1.6 µg per kg body weight of MeHg (FAO/WHO). The minimum intake of MeHg (0.05 µg/kg/week) was found in the visitors (others) category, whereas the hotel owners had the maximum intake (3.71 µg/kg/week). In general, it was found that a person of 60 kg can consume at least 2 kg of fish per week without exceeding PTWI such that it does not pose any health risk associated with Hg poisoning at the present contamination level. Hg based PTWI values for Nepal has not been proposed yet in fishery resources so as to reduce health risk of the people.

show abstract

“…Increasing attention has been paid on the mercury pollution problem in China because of the considerable amount of mercury emissions. , The studies , on mercury emissions and transfer have been carried out to evaluate the effect of mercury pollution on environment and biology in China. The total atmospheric mercury emission amount in China is estimated to be 536 tons, and approximately 38% comes from coal combustion .…”

Section: Introductionmentioning

confidence: 99%

Removal of Gas-Phase Elemental Mercury in Flue Gas by Inorganic Chemically Promoted Natural Mineral Sorbents

Ding

Zhao

et al. 2012

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

A variety of natural mineral sorbents were synthesized and tested on a lab-scale fixed-bed system to evaluate mercury removal efficiencies under a simulated flue gas condition that contains 84% N 2 , 4% O 2 , and 12% CO 2 in volume fraction. Three types of natural minerals, bentonite (Ben), mordenite (Mor), and attapulgite (Atp), were selected as raw sorbents, and several chemical promoters, such as CuCl 2 , NaClO 3 , KBr, and KI, were employed to enhance mercury removal abilities of the raw sorbents. The physical-chemical characteristics of these minerals were analyzed by an X-ray diffractometer (XRD), an accelerated surface area and porosimeter (ASAP) using the N 2 isotherm adsorption/desorption method, and X-ray fluorescence (XRF) spectrometry. The mercury concentration was detected continuously using a VM3000 online mercury analyzer. The results showed that CuCl 2 -impregnated Atp (Cu-Atp) and CuCl 2 -impregnated Ben (Cu-Ben) presented about 90% average Hg 0 removal efficiencies at 120 °C, respectively. In addition, as the temperature increased, the removal efficiencies decreased. Although NaClO 3 -impregnated Atp showed an average Hg 0 removal efficiency more than 90% at 120 °C, its performance was limited by the testing temperature, and that was probably due to the high iron oxide content in Atp. For the KI-impregnated sorbents, high mercury removal efficiencies could be observed, and the efficiencies increased steadily with the temperature increased from 70 to 150 °C. The three natural minerals presented poor adsorption abilities for bromine, which resulted in the disappointing mercury removal efficiencies. Generally, Cu-Atp, Cu-Ben, and KI-impregnated sorbents were promising costeffective mercury sorbents.

show abstract

Trophic transfer of mercury and methylmercury in an aquatic ecosystem impacted by municipal sewage effluents in Beijing, China

Cited by 10 publications

References 34 publications

Distribution and Trophic Transfer of Short-Chain Chlorinated Paraffins in an Aquatic Ecosystem Receiving Effluents from a Sewage Treatment Plant

Distribution and Trophic Transfer of Short-Chain Chlorinated Paraffins in an Aquatic Ecosystem Receiving Effluents from a Sewage Treatment Plant

The Risk of Mercury Exposure to the People Consuming Fish from Lake Phewa, Nepal

Removal of Gas-Phase Elemental Mercury in Flue Gas by Inorganic Chemically Promoted Natural Mineral Sorbents

Contact Info

Product

Resources

About