A study of lead and cadmium speciation in some estuarine and coastal sediments

Chakraborty, Parthasarathi; Babu, P.V. Raghunadh; Sarma, V. V. S. S.

doi:10.1016/j.chemgeo.2011.11.026

Cited by 105 publications

(42 citation statements)

References 60 publications

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“…Pollution of coastal aquatic environments is a global problem, with heavy metals being among the most significant pollutants (Luo et al 2010;Chakraborty et al 2011). Anthropogenic contaminants introduced into the aquatic environment can eventually accumulate in benthic sediments.…”

Section: Introductionmentioning

confidence: 99%

Anthropogenic impacts on reduced inorganic sulfur and heavy metals in coastal surface sediments, north Yellow Sea

et al. 2012

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This study investigated the organic carbon, reduced inorganic sulfur, and heavy metal distribution in superficial sediments at an estuary, a wastewater discharge area, and a mariculture area, as compared with an unpolluted distal site, in the north Yellow Sea, China. Sediment grain size, acid volatile sulfur (AVS), chromium (II)-reducible sulfur, elemental sulfur, total sulfur, total organic carbon (TOC), total nitrogen and trace metal content were determined for each site. These results indicate that pollution leads to increased TOC at all affected sites, which in turn leads to elevated AVS. The resultant change in diagenetic environment leads to changes in the mineralogical fate of Mn. Pb, Zn, Cu, and Cd: all are present at elevated concentrations, and with more metal in the non-residual fractions. Cd shows by far the most elevated concentrations and most significant increase in non-residual fractions and consequently poses the most significant pollution risk.

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Section: Introductionmentioning

confidence: 99%

Anthropogenic impacts on reduced inorganic sulfur and heavy metals in coastal surface sediments, north Yellow Sea

et al. 2012

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“…River bed sediments are now considered an environmental matrix to be controlled, and many countries have included sediment samplings in their monitoring of river quality [15,27,28,35,53]. Examinations of the post-mining areas that consisted in determining concentrations and infl uence of heavy metals (Zn, Cu, As, Pb, Sb, Mn, Ni, Cr, Cd, Hg, Ag) on watercourses existing close to the former copper mine were performed in German Mansfeld-Sudharz region.…”

Section: Introductionmentioning

confidence: 99%

Impact of Mining Dump on the Accumulation and Mobility of Metals in the Bytomka River Sediments

Jabłońska‐Czapla¹,

Szopa²,

Rosik-Dulewska³

2014

Archives of Environmental Protection

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Abstract:The research aim was to determine the long-term impact of the mine waste stored at the coal waste dump Hałda Ruda on the content of heavy metals in the bottom sediments of the Bytomka River. It is a watercourse fl owing along this coal waste dump and has been under its infl uence for over fi fty years. The research also attempted to determine the seasonality of changes (2 years) and mobility of selected elements.The article presents total contents of Cr, Mn, Ni, Cu, Zn, As, Cd and Pb in the bottom sediments collected from the Bytomka River. It also focuses on the distribution of these elements in particular geochemical fractions determined with the Tessier's sequential chemical extraction procedure. Total element contents were determined with an EDPXRF (Energy Dispersive X-ray Fluorescence) technique. The extractants of particular Tessier's fractions were determined quantitatively with an ICP-MS (Inductively Coupled Plasma Mass Spectrometry) spectrometer. The research results show that the stored waste signifi cantly infl uences the contents of heavy metals in the Bytomka River bottom sediments. The lowest concentration of heavy metals was observed at the B1 spot (above the dump), while the highest one was measured at the B3 spot (below the dump).Sequential chemical extraction of the bottom sediments indicates that the Zn content in the ion-exchange and carbonate fractions diminished within a year. Nevertheless, Zn bound to Fe and Mn oxides acted in the opposite way. Mn, Zn and Pb are the most dangerous elements from the viewpoint of environmental hazards, as their total concentrations were high. Moreover, their high contents were observed in the most mobile (ion-exchange and carbonate) fractions. Extremely toxic Cd was bound to the oxide fraction to the largest extent. Cu was mainly bound to the organic fraction while environmentally hazardous Cr was bound to the residual fraction.

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“…The comparison of Tessier procedure (Tessier et al 1979;Outola et al 2009;Chakraborty et al 2012) with the modified Tessier procedure (M-Tessier) was undertaken for Ca fractionation in 12 different samples. And the modified Tessier procedure was selected optimally in ''Condition selection for extracting procedures.…”

Section: Comparison Of Two Methodsmentioning

confidence: 99%

“…The extraction condition for trace metal might not be applicable to major element. The five-step sequential extraction scheme developed by Tessier et al (1979) has been used extensively to determine the amounts of metals associated with several different phases in soils and sediments (Chakraborty et al 2012). In the scheme, metals are divided into five fractions (exchangeable, bound to carbonate, bound to Fe/Mn oxides, bound to organic matter and residual).…”

Section: Introductionmentioning

confidence: 99%

Sequential extraction of calcium in lake sediments for investigating the cycle of phosphorus in water environment

Liu

Zhu

et al. 2014

Int. J. Environ. Sci. Technol.

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The role of calcium (Ca) in the cycle of phosphorus in water environment depends on the speciation of Ca in sediments, and reliable Ca sequential extraction method is useful for obtaining information about Ca transport processes from sediment to water. Experiments have been carried out to develop a simple but robust Ca sequential extraction method for identification of Ca portioning in sediments. The sequential extraction protocol was modified for extractants, extracting time, concentration and pH of the reagents in the first three steps of Tessier sequential procedure. With optimum conditions, there were 1:25 sediment to solution ratio and 3 h of extracting time shaken with NH 4 AC (1 mol L -1 , pH 7.0) (exchangeable Ca fraction); 1:25 sediment to solution ratio and extracted with NH 4 AC (1 mol L -1 , pH 5.0) for 5 h (carbonatebound Ca fraction); and 1:30 sediment to solution ratio and extracted with NH 2 OHÁHCl (0.5 mol L -1 , pH 1.5) for 6 h (Fe and Mn oxides bound Ca fraction). The recovery for Tessier procedure ranged form 35.6 to 71.1 %, while the recovery for the modified Tessier procedure ranged form 46.1 to 86.9 %. These results revealed that Tessier procedure underestimated the proportion of Ca in exchangeable fraction. In sediments, Ca was mainly exchangeable and carbonate bound, which was considered as the most liable fractions.

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A study of lead and cadmium speciation in some estuarine and coastal sediments

Cited by 105 publications

References 60 publications

Anthropogenic impacts on reduced inorganic sulfur and heavy metals in coastal surface sediments, north Yellow Sea

Anthropogenic impacts on reduced inorganic sulfur and heavy metals in coastal surface sediments, north Yellow Sea

Impact of Mining Dump on the Accumulation and Mobility of Metals in the Bytomka River Sediments

Sequential extraction of calcium in lake sediments for investigating the cycle of phosphorus in water environment

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