Composition, sources, and potential toxicological significance of PAHs in the surface sediments of the Meiliang Bay, Taihu Lake, China

Qiao, Mingqiang; Wang, Chunxia; Huang, Shuo; Wang, Donghong; Wang, Zijian

doi:10.1016/j.envint.2005.04.005

Cited by 381 publications

(171 citation statements)

References 25 publications

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“…Splitless injection of 1 µL of sample was automatically conducted. Detection was performed using selected-ion monitoring, and the details of the instrumental conditions were reported elsewhere (26). Before sample analysis, the instrument was tuned daily with decafluorotriphenylphosphine (DFTPP).…”

Section: Methodsmentioning

confidence: 99%

Estimation of the Uptake Rate Constants for Polycyclic Aromatic Hydrocarbons Accumulated by Semipermeable Membrane Devices and Triolein-Embedded Cellulose Acetate Membranes

Wang

et al. 2006

Environ. Sci. Technol.

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In this paper we report an extension of our previous work on the triolein-embedded cellulose acetate membrane (TECAM) as a passive sampling device (PSD) and describe the results from simultaneous exposure of TECAMs and triolein-containing semipermeable membrane devices (SPMDs) to PAHs in lake water for 16 days. The data obtained provided a comparison of the uptake rates of specific PAHs by the two PSDs. Using 16-day accumulation tests, similar PAH distribution patterns in TECAMs and in SPMDs (R 2 ) 0.89, p < 0.0001) were observed. However, it was noted that TECAMs could take up greater amounts of PAHs than SPMDs (735 ng/g of TECAM vs 630 ng/g of SPMD). Uptake rate constants of TECAMs and SPMDs for 16 priority pollutant (PP) PAHs, corrected for dissolved organic carbon, ranged from 0.28 to 2.94 L d -1 and from 0.16 to 0.91 L d -1 , respectively. The elimination rate constants of TECAMs were 1.4-6.7 times greater than those observed for SPMDs, thereby indicating that PAHs required shorter times to achieve equilibrium in TECAMs than in SPMDs. Thus, the results of the present study suggest that TECAMs have significant potential as a good monitor to assess the pollution of hydrophobic pollutants in aquatic environments.

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Section: Methodsmentioning

confidence: 99%

Estimation of the Uptake Rate Constants for Polycyclic Aromatic Hydrocarbons Accumulated by Semipermeable Membrane Devices and Triolein-Embedded Cellulose Acetate Membranes

Wang

et al. 2006

Environ. Sci. Technol.

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“…An HP-5 silica-fused capillary column (60 m × 0.32 mm inner diameter and 0.25 μm film thickness) was used with helium as the carrier gas. The operation parameters were previously reported by Qiao et al (2006). QA and QC procedures included analysis of method blanks, matrix duplicated spikes, and sample duplicates.…”

Section: Pah Analysismentioning

confidence: 99%

Organic micropollutants in the Yangtze River: Seasonal occurrence and annual loads

Müller

Pernet-Coudrier

et al. 2014

Science of The Total Environment

109

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• The Yangtze River drains 40% of China's mainland with 400 million inhabitants • Monthly concentrations and annual loads of organic pollutants were determined • Seasonality of loads of PAHs, most pesticides, and antiinfectives were concise • In spite of low concentrations due to high water discharge, pollutant loads are considerable a b s t r a c t a r t i c l e i n f o Twenty percent of the water run-off from China's land surface drains into the Yangtze River and carries the sewage of approximately 400 million people out to sea. The lower stretch of the Yangtze therefore offers the opportunity to assess the pollutant discharge of a huge population. To establish a comprehensive assessment of micropollutants, river water samples were collected monthly from May 2009 to June 2010 along a crosssection at the lowermost hydrological station of the Yangtze River not influenced by the tide (Datong Station, Anhui province). Following a prescreening of 268 target compounds, we examined the occurrence, seasonal variation, and annual loads of 117 organic micropollutants, including 51 pesticides, 43 pharmaceuticals, 7 household and industrial chemicals, and 16 polycyclic aromatic hydrocarbons (PAHs). During the 14-month study, the maximum concentrations of particulate PAHs (1-5 μg/g), pesticides (11-284 ng/L), pharmaceuticals (5-224 ng/L), and household and industrial chemicals (4-430 ng/L) were generally lower than in other Chinese rivers due to the dilution caused of the Yangtze River's average water discharge of approximately 30,000 m 3 /s. The loads of most pesticides, anti-infectives, and PAHs were higher in the wet season compared to the dry season, which was attributed to the increased agricultural application of chemicals in the summer, an elevated water discharge through the sewer systems and wastewater treatment plants (WWTP) as a result of high hydraulic loads and the related lower treatment efficiency, and seasonally increased deposition from the atmosphere and runoff from the catchment. The estimated annual load of PAHs in the river accounted for some 4% of the total emission of PAHs in the whole Yangtze Basin. Furthermore, by using sucralose as a tracer for domestic wastewater, we estimate a daily disposal of approximately 47 million m 3 of sewage into the river, corresponding to 1.8% of its average hydraulic load. In summary, the annual amounts flushed by the Yangtze River into the East China Sea were 2.9 × 10 6 tons of dissolved and particulate organic carbon (DOC and POC), 369 tons of PAHs, 98 tons of pesticides, 152 tons of pharmaceuticals, and 273 tons of household and industrial chemicals. While the concentrations seem comparably moderate, the pollutant loads are considerable and pose an increasing burden to the health of the marine coastal ecosystem.

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“…The extracts were completely condensed to approximately 2 mL by a rotary evaporator (Büchi R-200, Switzerland). The concentrated extracts were evaporated to near dryness in a gentle flow of nitrogen gas, then redissolved in 0.5 mL DMSO and stored at −20 • C before performing the bioassay [17]. Six concentration levels of test solutions were obtained by 2-fold dilution of each sediment raw extract, and DMSO was used as a solvent control for the conventional yeast assay.…”

Section: Sediment Organic Extracts Preparationmentioning

confidence: 99%

Thyroid hormone disrupting activities of sediment from the Guanting Reservoir, Beijing, China

Ren

et al. 2014

Journal of Hazardous Materials

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h i g h l i g h t s• Yeast bioassays were used to evaluate the TR disrupting activities of the sediments.• The organic extracts showed TR antagonistic activities.• The elutriates also significantly antagonized the TR.• The causes of toxicity in the elutriates appear to be partly related to the heavy metals. a r t i c l e i n f o a b s t r a c tIn the present study, yeast bioassays were used to evaluate and characterize the thyroid receptor (TR) disrupting activities of the organic extracts and elutriates of the sediments from the Guanting Reservoir, Beijing, China. An accelerated solvent extraction was used to separate the organic extracts, which were subjected to a yeast bioassay. The organic extracts could affect thyroid hormone signaling by decreasing the binding of the thyroid hormone. The TR antagonistic activity equivalents (TEQ bio ) referring to amiodarone hydrochloride were calculated and the observed TEQ bio-organic extracts ranged from 25.4 ± 3.7 to 176.9 ± 18.0 g/g. Elutriate toxicity tests using the modified yeast bioassay revealed that the elutriates also significantly antagonized the TR, with the TEQ bio-elutriates ranging from N.D. to 7.8 ± 0.8 g/L. To characterize the toxic compounds, elutriates were extracted by using a C18 cartridge or treated with ethylenediaminetetraacetic acid (EDTA, 30 mg/L). The results suggested that the addition of EDTA eliminated over 74.3% of the total effects, and the chemical analysis revealed that heavy metals, some of which exhibited TR disrupting potency, for example Zn and Cd, were detectable with higher concentrations in the elutriates. Thus, the cause(s) of toxicity in the elutriate appear to be partly related to the heavy metals.

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Composition, sources, and potential toxicological significance of PAHs in the surface sediments of the Meiliang Bay, Taihu Lake, China

Cited by 381 publications

References 25 publications

Estimation of the Uptake Rate Constants for Polycyclic Aromatic Hydrocarbons Accumulated by Semipermeable Membrane Devices and Triolein-Embedded Cellulose Acetate Membranes

Estimation of the Uptake Rate Constants for Polycyclic Aromatic Hydrocarbons Accumulated by Semipermeable Membrane Devices and Triolein-Embedded Cellulose Acetate Membranes

Organic micropollutants in the Yangtze River: Seasonal occurrence and annual loads

Thyroid hormone disrupting activities of sediment from the Guanting Reservoir, Beijing, China

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