Mercury in Thana Creek, Bombay Harbour

Zingde, M.D.; Desai, B. N.

doi:10.1016/0025-326x(81)90363-5

Cited by 44 publications

(8 citation statements)

References 14 publications

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“…The mercury content of the sediments ranges from 0.01 to 0.03 ,ug / g, with an average of 0.0198 ± 0.0045 ,ug / g. As shown in Distribution of mercury (ug/g) found in sediments in the Huanghe Estuary. [Nelson et al, 1975] [ Xu et al, 1982] ["I [Smith et al, 1973] [ Lindberg et al, 1975] ["I [Loring, 1975] [ Lindberg et al, 1975] [Zomgde and Desai, 1981] [ Kumagai and Nishimura, 1978] the mercury content found in average sandstone. Such low mercury content suggests that the area investigated has so far not been contaminated by anthropogenic mercury.…”

Section: Discussionmentioning

confidence: 99%

The effect of Huanghe River runoff on the occurrence, transportation and speciation of mercury in the Huanghe Estuary and adjacent sea.

et al. 1990

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Mercury content of the sediments and water in the area of the Huanghe Estuary and adjacent sea was measured for several species. The content values were found to be among the lowest levels in the world estuaries. The distributions, more or less homogeneous in dry season while exhibiting a gradient during the flood season, show the main role of the Huanghe runoff, having a heavy load of silt. Also ob served were the transformation of inorganic mercury into organic species during the mixing between fresh and saline waters, rectilinear correlation of sediment mercury to its median diameter, and the stratification of mercury species at the near estuary.

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Section: Discussionmentioning

confidence: 99%

The effect of Huanghe River runoff on the occurrence, transportation and speciation of mercury in the Huanghe Estuary and adjacent sea.

et al. 1990

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“…In this study, the Zn concentrations are found to be high on twofold and are classified as ''moderately contaminated sites'' (Stations S 2 , S 3 , S 4 , and S 5 ) as well as ''low polluted'' sites (station S 1 ) according to USEPA criteria (Giesy and Hoke 1990). The results indicate that the anthropogenic influence is caused by: (i) the input of untreated domestic sewage, as these elements have a preferential association with organic matter (Hirner et al 1990), (ii) through industrial effluent discharge, and (iii) extensive use of antifouling paints by shipping activities (Zingde and Desai 1979). These two elements (Cu and Zn) show significant correlation (Table 3) suggesting that both of them are predominantly from a common source.…”

Section: Sediment Geochemistrymentioning

confidence: 93%

Ecological consideration of trace element contamination in sediment cores from Sundarban wetland, India

et al. 2010

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This article reports on the concentration of selected trace elements (Mn, Zn, Cr, Cu, Ba, As, B, V, and Hg) and major elements (Fe and Al) from the intertidal sediment cores from Sundarban wetland, India. This is a typical meso-macrotidal estuarine area affected by domestic and industrial activities located upstream. The overall concentrations range is low to moderate, indicating the environmental conditions in the outfall zone (grain size, hydrodynamic regime, and confinement), which favors the in situ accumulation of pollutants. The extent of contamination from trace elements in Sundarban core sediments is evaluated through a two-pronged approach: (i) by determining the metal enrichment in the sediments through the calculation of Pollution Load Index (PLI), Enrichment Factor (EF) and Index of Geoaccumulation (I geo ), and (ii) by defining a potential level of biological risk by the use of quality criteria such as Threshold Effect Level (TEL) and Effects Range-Low (ERL) benchmarks. On the basis of the calculated indices, sediments are particularly enriched with Cr, Cu, B, V, and As. Those enrichments seem to be due to the fine granulometry of the regions with Fe and Mn oxihydroxides being the main metal carriers. Trace Elements input to the Sundarban wetland need to be kept under strict control in future specially with reference to As since, according to TEL and ERL benchmarks, it already appears to be associated with a potential biological risk.

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“…The Mahim Creek which enters the Mahim Bay receives the overflow of Vihar and Powai lakes during monsoon via the Mithi River (85 m 3 s −1 during August) and the system resembles an effluent drain affecting pollution in the bay. The Mithi River and the Mahim Creek are known to be highly polluted water bodies receiving large volumes of sewage and industrial effluents and have been investigated in the past (Zingde and Desai 1981;Zingde and Sabnis 1994). Thane…”

Section: Contamination Of Organochlorine Pesticides In Plastic Pelletsmentioning

confidence: 98%

Bimonthly variability of persistent organochlorines in plastic pellets from four beaches in Mumbai coast, India

Jayasiri

Purushothaman

Vennila

2015

Environ Monit Assess

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Organochlorines (OCs) such as polychlorinated biphenyls (PCBs) and organochlorine pesticides (OCPs) were analysed in plastic pellets collected from four beaches of Mumbai coast bimonthly from May 2011 to March 2012. A total of 72 pools of pellets were extracted and analysed by gas chromatograph equipped with a Ni(63) electron capture detector (ECD). The median concentrations of seven ΣPCBs and 16 ΣOCPs were 37.08 and 104.90 ng g(-1) (n = 72), respectively. PCB-28 was recorded at the highest concentration with a mean of 17.58 ± 2.77 ng g(-1) among the seven PCBs studied, followed by PCB-52 and PCB-101. Bimonthly variation was significant for ΣPCBs. The ΣPCB concentration in November was at par with that of September and was significantly higher than those of the other months (p < 0.05) with an increasing trend during the monsoon period. Among the OCPs, γ-HCH recorded the highest concentration with a mean of 33.88 ± 5.97 ng g(-1) followed by heptachlor and α-HCH. The ΣOCPs and ΣHCHs are not significantly varied among the months and sites. However, significant variation was observed for ΣDDTs among the months and sites (p < 0.05). The significantly higher concentration of ΣDDT (46.55 ± 12.23 ng g(-1)) was found in January than in the other months while it was intermediate in November. The study confirmed that plastic pellets are a trap for various cyclodine compounds in addition to PCB, HCH and DDT. Further, pellets can be used to study the temporal variability for a range of organic micropollutants.

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Mercury in Thana Creek, Bombay Harbour

Cited by 44 publications

References 14 publications

The effect of Huanghe River runoff on the occurrence, transportation and speciation of mercury in the Huanghe Estuary and adjacent sea.

The effect of Huanghe River runoff on the occurrence, transportation and speciation of mercury in the Huanghe Estuary and adjacent sea.

Ecological consideration of trace element contamination in sediment cores from Sundarban wetland, India

Bimonthly variability of persistent organochlorines in plastic pellets from four beaches in Mumbai coast, India

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