Origin and chemical partitioning of heavy metals in riverbed sediments

Karbassi, Abdolreza; Bayati, I; Moattar, Faramarz

doi:10.1007/bf03325905

Cited by 59 publications

(29 citation statements)

References 17 publications

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“…The concentration of Pb was high in the north, south, and west regions, compared with low concentration in the east region and core zone (P \ 0.05). The spatial distribution of the metals, however, indicated that it had been apparently affected by the surrounding agriculture and industry (Mohiuddin et al 2010;Karbassi et al 2006). In the north region of the study area, the concentrations of metals (except for Pb) were high.…”

Section: Resultsmentioning

confidence: 99%

Speciation and ecological risk of heavy metals and metalloid in the sediments of Zhalong Wetland in China

Zang

Xiao

et al. 2013

Int. J. Environ. Sci. Technol.

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A total of 271 sediments samples from the Zhalong Wetland were analyzed for concentration and distribution of Hg, Cd, As, Cu, Pb, Zn, Cr, and Zn; their speciation according to the modified European Community Bureau of Reference sequential extraction procedures and their ecological risk based on Lars Hakanson's potential ecological risk assessment and risk assessment code were made. The results can be summarized as the followings: (1) Concentrations of all metals measured were above soil background values of Songnen Plain, and their spatial distributions were distinctly different. The concentrations of metals (except Pb) were high in the east, followed by the north, and were relatively low in the core zone and south. The concentration of Pb was high in the north, south, and west, compared with low concentration in the core zone and east. (2) The dominant proportion of Pb, Zn, and Cr was in the residual fraction, suggesting that they were environmental stable. The concentrations of Cu and As in the reducible fraction, the concentration of Cd in the acidsoluble fraction, and the concentration of Hg in the oxidizable fraction were relatively high, indicating they had greater environmental effects. (3) The evaluation of the ecological risk showed that Cd, Hg, and As had relatively high ecological risk index, especially the ecological risk of Cd should be paid attention to. In general, the ecological risk of the heavy metals and metalloid by zone was experimental zone [ buffering zone [ ecological tourism zone [ core zone.

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Section: Resultsmentioning

confidence: 99%

Speciation and ecological risk of heavy metals and metalloid in the sediments of Zhalong Wetland in China

Zang

Xiao

et al. 2013

Int. J. Environ. Sci. Technol.

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“…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. Later, Karbassi, et al (2006) reported that higher elemental concentrations have been observed in estuarine zone when compared with riverine sediments (except for Al, Fe, Pb and Mn). Saeedi, et al, (2004) reported the potential of reverine suspended particulate matter and bottom sediments in adsorbing dissolved metals like Cd, Mn.…”

Section: Introductionmentioning

confidence: 98%

Speciation of heavy metals in electroplating industry sludge and wastewater residue using inductively coupled plasma

Venkateswaran

Vellaichamy

Palanivelu

2007

Int. J. Environ. Sci. Technol.

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ABSTRACT:The speciation of metals in environmental samples is a critical factor in assessing the potential environmental impacts, before their disposal. The distribution and speciation of toxic heavy metals in plating wastewater residues and sludge was investigated for four samples using sequential extraction method. Tessier method was used to fractionate the metal content into exchangeable, acid extractable, reducible and oxidizable fractions. Residual and total metal contents were determined in aqua regia digest. The extracts were analysed for metals using inductively coupled plasma -atomic emission spectrometry. The bioavailable fraction (exchangeable and acid extractable fractions) is comprised less than the other forms. The oxidisable and reducible forms are dominants for all the four samples studied. The major metal constitute in the samples is iron, the wastewater residue contains (12.3 and 7.4 g/Kg respectively on dry basis) and the sludge contains (31.5 and 41.6 g /Kg) respectively. Cr concentration is higher in wastewater residue of second electroplating industry. The descending order of the average total metal contents for these four samples were Fe > Cr > Sn > Zn >Cu > Ni > Mn > Pb > Cd > Ag. Based on the average of absolute values for the four samples the highest bioavailability order of metals is Cr (39 %) in wastewater residues and Zn (32 %) in sludge samples. Metal recovery was good, with < 10 % difference between the total metal recovered through the extractant steps and the total metal determined using aqua regia extract.

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“…However, concentrations of the other six metals were considerably lower than the average concentrations of the World Sediment background level. Such discrepancies between concentrations of elements in the area of study with those of mean World Sediments are indicative of considerable deviations in geological units [21].…”

Section: Resultsmentioning

confidence: 93%

Assessment of Heavy Metals Associated with Bottom Sediment of Asejire Reservoir, Southwest Nigeria

Godwin

2016

ILNS

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ABSTRACT.A study on the characteristic of sediment quality of Asejire Reservoir was conducted to evaluate the heavy metal content of the reservoir. Twenty stations were selected, samples and analyzed using standard methods. The result showed that the sediment was slightly acidic across the study stations, with low conductivity and organic matter content. The heavy metals order of dominance was: Fe>Pb>Cu>Zn>Mn>Al>Ba>Ni>Cr. The mean concentration levels of all the heavy metals were lower than mean background value except Fe, Cu and Pb. However, calculated Enrichment Factor (EF) values for all the heavy metals investigated showed that they were less than 1.5 (<1.5), suggesting that the heavy metals were all derived mainly from natural sources such as bedrock materials and weathering processes.

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Origin and chemical partitioning of heavy metals in riverbed sediments

Cited by 59 publications

References 17 publications

Speciation and ecological risk of heavy metals and metalloid in the sediments of Zhalong Wetland in China

Speciation and ecological risk of heavy metals and metalloid in the sediments of Zhalong Wetland in China

Speciation of heavy metals in electroplating industry sludge and wastewater residue using inductively coupled plasma

Assessment of Heavy Metals Associated with Bottom Sediment of Asejire Reservoir, Southwest Nigeria

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