Hydrogeochemistry and transport of organic contaminants in an urban watershed of Chesapeake Bay (USA)

Foster, Gregory D.; Roberts, Eldon; Gruessner, Barry; Velinsky, David J.

doi:10.1016/s0883-2927(99)00107-9

Cited by 80 publications

(51 citation statements)

References 23 publications

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“…Concentrations of DDTs in particulate phase were much higher than those in dissolved phase in the Yangtze River (Fig. 5b), which was agreeable to results of other studies (Foster et al 2000;Yang et al 2004). Furthermore, the concentrations of DDTs in particulate phase had an increasing tendency along the Yangtze River from upstream to downstream and the peak concentration was observed at the site Y10.…”

Section: Phase Distributionsupporting

confidence: 92%

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Residues of organochlorine pesticides in water and suspended particulate matter from the Yangtze River catchment of Wuhan, China

Tang

Zhang

Shen

et al. 2007

Environ Monit Assess

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The residues of 13 organochlorine pesticides (OCPs) in surface water and HCHs and DDTs in suspended particulate matter (SPM) from rivers and lakes in Yangtze River catchment of Wuhan, China, were investigated. The concentration of total OCPs in surface water varied from 1.01 to 46.49 ng l(-1) (mean 10.55 ng l(-1)). The levels of total HCHs (SigmaHCH) and total DDTs (SigmaDDT) in surface water were in the range of 0.55-28.07 ng l(-1) and lower than detection limit to 16.71 ng l(-1), respectively, which was lower than Chinese standards on the whole. For OCPs residues in SPM, the mean levels varying from 0.20 to 34.72 ng l(-1) and 0.46 to 2.72 ng l(-1) for SigmaHCH and SigmaDDT, respectively, which ranked the relatively higher levels among Chinese studied rivers. Results from this investigation showed that previous excessive usage of technical OCPs was the main reason for the residues of HCHs and DDTs both in surface water and SPM, although some new sources were likely to occurred in the region. Apart from the OCPs in SPM originated from upstream in flood season, one of the important sources of OCP residues both in water and SPM in Yangtze River was supposed to be the inputs of its tributaries. Additionally, in situ water-SPM phase distributions of OCPs indicated that HCHs tended to transport (correction of totransport) with water as well as DDTs was prone to combine with SPM in Yangtze River catchment of Wuhan.

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Section: Phase Distributionsupporting

confidence: 92%

“…It can be seen from Fig. 5a that HCHs mostly existed in dissolved phase, which was well documented (Foster et al 2000). Similar phenomenon could be observed for the distribution of HCHs in the Pearl River in south China according to Yang et al (2004).…”

Section: Phase Distributionsupporting

confidence: 83%

Residues of organochlorine pesticides in water and suspended particulate matter from the Yangtze River catchment of Wuhan, China

Tang

Zhang

Shen

et al. 2007

Environ Monit Assess

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“…The contamination of receiving waters nearby urban areas has been well documented and attributed to the discharge of stormwater runoff via combined sewer overflows and industrial and municipal effluent (Golomb et al, 2001;Foster et al, 2000), as well as to atmospheric deposition (Brunciak et al, 2001;Offenberg and Baker, 1997;Simcik et al, 1997). The effect of the 'urban atmospheric plume' on chemical loadings has been documented for Chesapeake Bay (Offenberg and Baker, 1997), Lake Michigan (Simcik et al, 1997), New Jersey estuary (Brunciak et al, 2001;Du et al, 2009) and the Hudson River estuary (Totten et al, 2004).…”

Section: Urban Emissions and Urban-rural Gradientsmentioning

confidence: 99%

Sources, Fate and Effects of Contaminant Emissions in Urban Areas

Hodge

Diamond

2009

Persistent Organic Pollutants

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“…The hygienic threshold values for each PCB congener in drinking water is 100 ng/L, 4 but when investigating the transport properties in a water environment, detection limits below 1 ng/L are sometimes required. [5][6][7][8][9][10][11] The need to determine very low concentrations of PCBs in natural water and wastewater samples calls for large concentration enrichment factors before a final determination is possible. This can be accomplished by liquid-liquid extraction (LLE), such as in the US EPA Method 608.…”

Section: Introductionmentioning

confidence: 99%

“…This can be accomplished by liquid-liquid extraction (LLE), such as in the US EPA Method 608. 12 LLE has been applied to determine PCBs in snow and river water in a low ng/L range using 0.5 L samples, 5 but in some cases over 10 L sample is required when analyzing PCBs at the pg/L level, as in tidal rivers 6 and seawater. 7 An alternative way of extracting PCBs from water is solid-phase extraction (SPE), as described in the US EPA Method 525.…”

Section: Introductionmentioning

confidence: 99%

Development of a Combined Solid-Phase Extraction-Supercritical Fluid Extraction Procedure for the Determination of Polychlorinated Biphenyls in Wastewater

et al. 2006

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A combined solid-phase extraction (SPE)-supercritical fluid extraction (SFE) procedure was developed for the analysis of polychlorinated biphenyls (PCBs) in wastewater. The importance of cleaning and drying the filters and SPE-disks prior to eluting PCBs with SFE was studied, leading to improved recoveries for all congeners investigated. The average PCB recovery of the final procedure, at a concentration of 18 ng/L in reagent water, was 101% with relative standard deviations ranging from 1 to 5% for the different congeners. Spiked leachate to a final concentration of 4 ng/L was extracted directly after spiking, or after 24 h of spiking. An average recovery of 112% was obtained in the direct extraction of spiked leachate.

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Hydrogeochemistry and transport of organic contaminants in an urban watershed of Chesapeake Bay (USA)

Cited by 80 publications

References 23 publications

Residues of organochlorine pesticides in water and suspended particulate matter from the Yangtze River catchment of Wuhan, China

Residues of organochlorine pesticides in water and suspended particulate matter from the Yangtze River catchment of Wuhan, China

Sources, Fate and Effects of Contaminant Emissions in Urban Areas

Development of a Combined Solid-Phase Extraction-Supercritical Fluid Extraction Procedure for the Determination of Polychlorinated Biphenyls in Wastewater

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