Use of sequential leaching, mineralogy, morphology and multivariate statistical technique for quantifying metal pollution in highly polluted aquatic sediments—A case study: Brahmani and Nandira Rivers, India

Rath, Prasanta; Panda, Unmesh Chandra; Bhatta, D.; Sahu, K. C.

doi:10.1016/j.jhazmat.2008.07.048

Cited by 128 publications

(60 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…34 The fractions most influenced by human activity include the exchangeable and carbonate-bound fractions, which are considered to be weakly retained and may equilibrate with the aqueous phase, hence becoming more rapidly bioavailable. 43 The risk assessment code gives an indication of the possible risk by applying a scale to the percentage of metals present in the exchangeable and carbonate fractions. Accordingly, if this value is < 1% there is no risk for the aquatic system, 1-10% indicates low risk, 11-30% medium risk, 31-50% high risk, and > 50% very high risk.…”

Section: Ecological Risk Assessmentmentioning

confidence: 99%

Metal fractionation in sediments of the Sergipe River, northeast, Brazil

Passos¹,

Alves²,

Garcia³

et al. 2011

J. Braz. Chem. Soc.

View full text Add to dashboard Cite

O procedimento de extração seqüencial proposto pelo European Community Bureau of Reference (BCR) foi empregado para o fracionamento de Cd, Cr, Cu, Ni, Pb e Zn em sedimentos do estuário do Rio Sergipe, Brasil. O método empregado apresentou-se adequado com limite de detecção e desvio padrão aceitável para a determinação de metais em amostras de sedimentos. Cd foi o metal com maior percentagem na fração extraível. Ni e Pb estão presentes principalmente nas frações oxidável e redutível. Cr, Cu e Zn foram encontrados predominantemente na fração residual. A ordem de mobilidade dos metais extraídos foi Pb > Cd > Ni > Cu > Cr > Zn. De acordo com o código de avaliação de risco (RAC), as amostras de sedimentos mostraram risco baixo a médio para todos os metais analisados.The sequential extraction procedure proposed by the European Community Bureau of Reference (BCR) was applied for the fractionation of Cd, Cr, Cu, Ni, Pb and Zn in sediments from the Sergipe Estuary, Brazil. The method showed satisfactory recoveries, detection limits and standard deviations for trace metals determinations in sediment samples. Cd was the metal with the greatest percentage in the exchangeable fraction. Pb and Ni were present mainly in the reducible and oxidizable fractions. Cr, Cu and Zn were predominantly associated with the residual fraction. The order of mobility of metals extracted was Pb > Cd > Ni > Cu > Cr > Zn. According to the risk assessment code (RAC), the sediments showed low to medium risk for all metals.

show abstract

Section: Ecological Risk Assessmentmentioning

confidence: 99%

Metal fractionation in sediments of the Sergipe River, northeast, Brazil

Passos¹,

Alves²,

Garcia³

et al. 2011

J. Braz. Chem. Soc.

View full text Add to dashboard Cite

show abstract

“…Metals cannot always be permanently fixed by sediments. Some of the sediment-bound metals may remobilize and can be released back to the waters via variation of environmental conditions such as acidification, redox potential, and chelation, etc., and impose adverse effects on living organisms (Sutherland & Tact., 2007;Rath, 2009). Thus the mobility of metals in the environment depends on their chemical forms or type of the binding of the element.…”

Section: Introductionmentioning

confidence: 99%

Distribution and Fractionation of Heavy Metals in Sediments of Karra River, Hetauda, Nepal

Pradhanang

2015

J. Inst. Sci. Tech.

View full text Add to dashboard Cite

A five-step sequential extraction procedure was applied for the determination of the distribution of four elements (Cr, Mn, Fe, and Ni) in sediment of the Karra River. Sediment samples were collected from 16 different sites in the Karra River (upstream, industrial belt, downstream). The distribution of trace metals among exchangeable, carbonate, reducible, oxidizable and residual fractions were determined. The total concentration of metals varies in the range of Cr 72-4339.54 mg kg . The accuracy evaluated by comparing total trace metal concentrations with the sum of the five individual fractions proved to be satisfactory. The chemical speciation of Cr, Mn, Fe, and Ni in most sampling stations were in the order of residual > reducible > oxidazable > carbonate> exchangeable. Fractionation analysis showed that dominant metals are in residual fraction. The highest metal concentrations were observed at the most polluted sites of the industrial belt. High concentration of chromium was found in the Fe-Mn oxide and organic fraction in some of the sites of industrial belt.

show abstract

“…Many studies [7,8] applied risk assessment code (RAC), the percentage exchangeable form and carbonate form, to assess the capability of resolution metal in sediment to water column. RAC of Cu, Pb, Zn, Ni at all investigated sites were in the range of 1-10% reveals the low risk but RAC of Cd and Cr in many sites found in medium risk (11-35%).…”

Section: Metal Fractionation In Sediment Of Cau Rivermentioning

confidence: 99%

Studies on Distribution and Fractionation of Heavy Metals in Sediment of Cau River, Vietnam

Anh¹

2018

JST

View full text Add to dashboard Cite

Cau River, one of the major rivers of Thai Binh River Systems, has been under pressure from discharge from the economic and social development activities of the region. Water and sediment samples will be collected along Cau River to determine the spatial variability of metal in Cau River. Sediments collected from Cau River were extracted sequentially to investigate the distribution and fractionation of metal in Cau River. Results showed that the presence of certain metals in water and sediment with the concentrations ranged in a wide variation. In water Cu (58-181 µg/L), Pb (0.6-1.85 µg/L), Zn (18.1-32.5 µg/L), Cd (0-0.02 µg/L), Ni (3.04-4.41 µg/L), Cr (2.72-5.07 µg/L); in sediment Cu (27.6-401 mg/kg), Pb (0-282 mg/kg), Zn (3.9-71.9 mg/kg), Cd (0.01-2.44 mg/kg), Ni (2.24-5.89 mg/kg), Cr (4.08-11.5 mg/kg). Sequential extraction for study the distribution of metal species in sediment showed that metal mainly concentrated immobile form of residues fraction, organic compound bound fraction and Fe-Mn oxide associated fraction. This dominant existence of metal result in the tendency of metal assimilation in sediment and low bioavailability. However, some toxic metals such as Cd, Cr found moderated soluble form must be studied more for their release to water phase and and bioaccumulation.

show abstract

Use of sequential leaching, mineralogy, morphology and multivariate statistical technique for quantifying metal pollution in highly polluted aquatic sediments—A case study: Brahmani and Nandira Rivers, India

Cited by 128 publications

References 36 publications

Metal fractionation in sediments of the Sergipe River, northeast, Brazil

Metal fractionation in sediments of the Sergipe River, northeast, Brazil

Distribution and Fractionation of Heavy Metals in Sediments of Karra River, Hetauda, Nepal

Studies on Distribution and Fractionation of Heavy Metals in Sediment of Cau River, Vietnam

Contact Info

Product

Resources

About