Heavy metals in sediments from canals for water supplying and drainage: Mobilization and control strategies

Malferrari, Daniele; Brigatti, Maria Franca; Laurora, Angela; Pini, Stefano

doi:10.1016/j.jhazmat.2008.04.014

Cited by 57 publications

(26 citation statements)

References 19 publications

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“…For the analysis of heavy metal and metalloid species, the acid-soluble, oxidizable, reducible, and residual fractions were sequentially extracted following European Community Bureau of Reference (BCR) methods (Guevara-Riba et al 2004;Arain et al 2008;Malferrari et al 2009). All samples were analyzed using an inductively coupled plasma mass spectrometer (ICP-MS) (Agilent Technologies Co. Ltd., USA).…”

Section: Sample Testing Methodsmentioning

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: Sample Testing Methodsmentioning

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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“…The modified BCR sequential extraction scheme was used for metal fractionation (Guevara-Riba et al 2004;Arain et al 2008;Malferrari et al 2009). Sediment samples were dried and sieved to \2 mm before BCR sequential extraction.…”

Section: Bcr Sequential Extraction Proceduresmentioning

confidence: 99%

“…BCR sequential extraction method which harmonize the various sequential extraction procedures used for sediment analysis was proposed (Ure et al 1993) by the European Community Bureau of Reference (BCR) in 1992 (now the Standards Measurement and Testing Programme). The modified BCR sequential extraction procedure has been applied to evaluate the potential mobility and the possible transfer of heavy metals from sediments to the surrounding environment in several coastal regions (Guevara-Riba et al 2004;Caplat et al 2005;Cuong and Obbard 2006;Malferrari et al 2009). …”

Section: Introductionmentioning

confidence: 99%

Mobility and ecological risk assessment of heavy metals in surface sediments of Xiamen Bay and its adjacent areas, China

Yan

Xian

et al. 2009

Environ Earth Sci

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Xiamen Bay (XMB) has received substantial loadings of pollutants from industrial and municipal wastewater discharged since the 1980s. To assess ecological risks and the current spatial changes of metal contaminants in bottom surface sediments, 12 samples were collected. Samples were subjected to a total digestion technique and analyzed by ICP-OES for Cu, Pb, Zn, Cr, and Cd, and by AFS for Hg and As. Among these metals, Zn had the highest values (68-268 mg kg -1 ), followed by Pb (27-71 mg kg -1 ), and lower concentrations were found for Cd (42-1,913 lg kg -1 ) and Hg (0-442 lg kg -1 ). In comparison with the average crustal abundance values, the results indicated that nearly half of the sediment samples of XMB and its adjacent areas were contaminated by Cd, Pb, Zn, and As. Furthermore, based on the modified BCR sequential extraction procedure, the chemical speciation of heavy metals (Cd, Cr, Cu, Pb, Zn, Hg, and As) in selected sediment samples were evaluated in this study. Data from BCR sequential extractions indicated that Cd posed a medium ecological risk, whereas, Cr posed low risk since its exchangeable and carbonate fractions were below 4%, and the mobility of heavy metals in XMB decreased in the order Cd [ Pb [ Cu [ Zn [ Hg [ As [ Cr. By applying mean effects range median quotients (mERMQ), the results showed that Yuandang Lagoon with mERMQ value [0.5 would be expected to have the greatest potential toxic risk in amphipod within XMB and its adjacent areas.Keywords Xiamen Bay Á Surface sediment Á Heavy metals Á Risk assessment code (RAC) Á Mean effects range median quotients (mERMQ) Á Yuandang Lagoon

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“…These sediment-associated organisms can include macrophytes, benthic invertebrates and fish. Sediment can also be a source of contamination of surface water, as disturbances within the ecosystem can remobilise contaminants from the sediment into the water column (Chen and Chen 1999;Malferrari et al 2009). Furthermore, some of these pollutants (e.g.…”

Section: Introductionmentioning

confidence: 99%

The contribution of physical and chemical sediment characteristics to environmental risk from an irrigation scheme in South Africa

2015

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Purpose The physical and chemical characteristics of sediment from a South African irrigation scheme were used to determine the sediment stressors within the system and to determine whether or not stressors have the potential to contribute to pollutant risk within the system. The information generated also strengthens the database of sediment chemical concentrations in South Africa. Materials and methods The sediment condition at various sites along the Vaalharts Irrigation Scheme (VHIS) was assessed based on physical and chemical characteristics. Sediment samples were collected during three surveys from 2007 to 2009. Physical analysis included organic content and grain size determination. The chemical characteristics were analysed using sequential metal extractions and pesticide analysis. Results and discussion Sediment samples from the Harts River showed increasing organic content along the VHIS while some sediment deposition was evident. Chemical analysis indicated that no pesticide residues were present in the sediment. In general, the sediment metal concentrations indicated lower concentrations than measured at other sites in South Africa. The sequential extractions indicated that cadmium and manganese were contained mostly in the soluble phase resulting in a high to very high risk of metal pollution effects, as measured with the Risk Assessment Code (RAC). A medium risk was identified for cobalt and zinc concentrations. The high fractions of cadmium present in the soluble fraction indicated anthropogenic enrichment, potentially due to phosphate fertiliser which is used in agriculture. Conclusions Sediment assessments are not routinely applied in South Africa resulting in very little reference or background data available for the area. The metal concentrations for the study area were generally lower than those for other studies in more polluted regions. A low risk for the majority of metals was identified using the RAC methodology with the exception of manganese and cadmium. The study also contributes to the available knowledge surrounding metal pollution in riverine sediments in South Africa.

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Heavy metals in sediments from canals for water supplying and drainage: Mobilization and control strategies

Cited by 57 publications

References 19 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

Mobility and ecological risk assessment of heavy metals in surface sediments of Xiamen Bay and its adjacent areas, China

The contribution of physical and chemical sediment characteristics to environmental risk from an irrigation scheme in South Africa

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