Geochemistry of heavy metals and sedimentation rate in a bay adjacent to the Caspian Sea

Karbassi, Abdolreza; Amirnezhad, Reza

doi:10.1007/bf03325832

Cited by 42 publications

(18 citation statements)

References 21 publications

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“…In the present study, approximately 7% of the total Fe content was in the form of sulfide ions. Under reducing conditions, mobilization of metals from sediment to overlying water may occur (Karbassi et al 2001;Saeedi and Karbassi 2006;Karbassi and Aminrnezhad 2004). Further, the sum of loose, sulfide and organic ions are grouped as the anthropogenic portion of metals (Table 6).…”

Section: Resultsmentioning

confidence: 96%

Metal pollution assessment of sediment and water in the Shur River

Karbassi

Monavari²,

Bidhendi

et al. 2007

Environ Monit Assess

278

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Intensified industrialization and human activities have resulted in the release of various contaminants into the environment. Among them, heavy metals are often present as a result of mining, milling and industrial manufacturing. In the present investigation, bulk concentrations Pb, Cd, Zn, Cu, Fe, Ca and Al in Shur River (Iran) bed sediments and water around the Sarcheshmeh copper mine were measured from several sample locations. In addition, partitioning was assessed to determine the proportions of metals in different forms. The degree of sediment contamination was evaluated using an Enrichment Factor (EF) and geo-accumulation index (I (geo)) and a newly developed pollution index (I (POLL)). Elevated metals in sediment and water were found to be correlated with areas of the river that were proximal to direct and indirect mining activities. Cadmium and Zn showed the highest pollution index. Cluster analysis was performed in order to assess heavy metal interactions between water and sediment. Chemical partitioning studies revealed that organic metallic bonds were not significantly present in the sediment of the Shur River.

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Section: Resultsmentioning

confidence: 96%

Metal pollution assessment of sediment and water in the Shur River

Karbassi

Monavari²,

Bidhendi

et al. 2007

Environ Monit Assess

278

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“…Sedimentation rate of 1.76 cm/y is generally high compared to most of the rates reported in literature. For instance, the Gorgan Bay in Iran was reported to be undergoing sedimentation at a rate of 1.4 to 2.45 mm/y (Karbassi and Amirnezhad 2004); Lake Ontario in Canada-0.02 to 0.11 cm/y (Farmer 1978); and Lake Taihu in China-0.6 to 3.6 mm/y (Qin et al 2007). It suggests that Lake Amponsah was undergoing rapid siltation, quite comparable to the maximum rates of sedimentation reported in North Indian lakes, some measuring up to 1.5 cm/y (Kumar et al 2007).…”

Section: Rate Of Sedimentation In Lake Amponsahmentioning

confidence: 99%

Contamination from mercury and other heavy metals in a mining district in Ghana: discerning recent trends from sediment core analysis

et al. 2016

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Background: Many years of gold mining in Ghana has generated huge environmental legacy issues, particularly contamination from heavy metals and metalloids. The present study evaluated the contamination from arsenic (As), cadmium (Cd), copper (Cu), mercury (Hg) and lead (Pb) in sediment cores at Bibiani, a historical gold mining town in Ghana. The study took a retrospective look at these contaminations by conducting sediment core analysis of heavy metals in sediments collected from Lake Amponsah in the Bibiani district. Sediment cores were sampled to a depth of 30 cm. Results:The Lake was found to be undergoing sedimentation at an average rate of 1.76 cm/y. There was marginal decline in Hg concentrations over the past two decades (from the 1990s to 2010s), while the other metals showed relatively increasing trends. The Hg policy restricting Hg usage in Ghana since 1989 has contributed to the recent marginal decline of Hg in the sediment. It was found that small-scale miners illicitly applied Hg but used crude retrofits to recover some of the Hg during the gold amalgamation process. This perhaps contributed to the marginal decline being observed in the sediment compartment with depth. Nevertheless, there was concern of potential risk of exposure to gaseous Hg during the amalgamation process. Conclusion:Based on findings of this study, Hg legislation in Ghana should be enforced to the latter as it has shown good sign of reducing environmental contamination from this metal.

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“…Geochemical studies of sediment cores are helpful in the assessment of pollution (Holm, 1988), changes in climatic conditions (Faganelli, et al, 1987 andAmirnezhad, 2004), rate of sedimentation (Karbassi, 1993), etc. While many geochemical studies have been carried out on the surficial sediments of the western continental shelf of India, not many workers have studied sediment cores (Borole, et al, 1982;Dilli, 1986;Borole, 1988;Karbassi, et al, 1988 andShankar, 1991).…”

Section: Introductionmentioning

confidence: 99%

Geochemistry of two sediment cores from the west coast of India

Karbassi

Shankar

2005

Int. J. Environ. Sci. Technol.

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Copper, Pb, Zn, Ni, Co, Mn, AI, Ca, magnetic susceptibility and loss on ignition of sediments from two cores near Mangalore along the western continental shelf of India have been studied. The sediments have high Al and organic matter contents due to the high sedimentation rate and their proximity to river mouths. Down-core variations of elements indicate a decrease of lithogenous component during probably the past few centuries. While abundance of calcareous shells in some zones has lead to the dilution of most of the metals, it appears that Pb and Mn are associated with this phase. Copper, Zn and Fe are associated with organic matter and detrital particles, whereas Ni and Co are predominantly associated with the insoluble fraction. Oxides/hydroxides of Fe and Mn are absent because of the reducing conditions and the high terrigenous influx. Geochemically, Mn and Fe are present in different phases of sediments (in the insoluble fraction and organic matter respectively). The Fe content of one of the cores is positively correlated with magnetic susceptibility.

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Geochemistry of heavy metals and sedimentation rate in a bay adjacent to the Caspian Sea

Cited by 42 publications

References 21 publications

Metal pollution assessment of sediment and water in the Shur River

Metal pollution assessment of sediment and water in the Shur River

Contamination from mercury and other heavy metals in a mining district in Ghana: discerning recent trends from sediment core analysis

Geochemistry of two sediment cores from the west coast of India

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