Comparison of two sequential extraction procedures for heavy metal partitioning in mine tailings

Malik, Anju; Banerjee, Debjyoti

doi:10.1016/j.chemosphere.2009.12.064

Cited by 127 publications

(63 citation statements)

References 41 publications

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“…Mahmoud et al studied the speciation of heavy metals in sediments and found that the residual phase of Cu was dominant [43]. A large proportion was also found in F4 that could be released if the sediment was exposed to reducing conditions [44]. When the percentages of F1 to F5 over the total adsorption were calculated for each reactor, Tukey's test (95% confidence level) also shows that the average percent and the adsorption of F5 in the four reactors (44.2% or 104.5 mg·kg −1 ) are significantly different from the four other fractions (F1 to F4), and F4 (average 24.0% or 42.4 mg·kg −1 ) is also different from F1 (the lowest average 3.8% or 7.2 mg·kg −1 ).…”

Section: Cumentioning

confidence: 99%

Removal of Heavy Metals from Urban Stormwater Runoff Using Bioretention Media Mix

Wang

Zhao

Yang

et al. 2017

Water

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Heavy metals from urban stormwater runoff are important sources of surface water pollutants. Sand, zeolite, sandy loam, and quartz-sand were separately mixed with lignin to form four bioretention media mixes for experimental study using synthetic stormwater runoff. The average removal efficiencies of four heavy metals (Cu, Zn, Cd, and Pb) by the four media mixes were all better than 97% at the optimum pH of 6.05 (ranging from 6 to 8) and the seven-day rainfall-event interval. The influence of the influent concentration and the rainfall-event interval on the removal efficiency of heavy metals by the four media mixes was not significant, but the variation of the removal efficiencies at the four-day rainfall-event interval was large. Under acidic conditions, there was a certain heavy metal dissolution in the four reactors, but the effect on the removal efficiency was minor. Heavy metals were present in the media mainly in the form of the residual fraction (>50%). The accumulation of Cu, Zn, and Cd in the surface planting-soil layer (same humus and sandy-loam mixture for all reactors) was significantly larger than the accumulation at deeper depths but not for Pb. Overall, the heavy metal removal efficiencies by the four media mixes were not significantly different, and the choice of the planting-soil layer can become the control factor of heavy metal removal.

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Section: Cumentioning

confidence: 99%

Removal of Heavy Metals from Urban Stormwater Runoff Using Bioretention Media Mix

Wang

Zhao

Yang

et al. 2017

Water

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“…The metal fractions extracted by the BCR (or modified BCR) method at different steps represented different degrees of bioavailability for the different forms of association and different mechanisms of availability (Anju and Banerjee 2010). The metal extracted at the first step is regarded as exchangeable, water and acidsoluble, at the second step as Mn/Fe oxides-bound, and at the third step as oxidisable organic matter-and sulphides-bound, and the residual fraction is regarded as metal in the crystal lattice of minerals (Hass and Fine 2010).…”

Section: Speciation Of Heavy Metals In Soil and In Particle Fractionsmentioning

confidence: 99%

Dynamics of plant metal uptake and metal changes in whole soil and soil particle fractions during repeated phytoextraction

Luo

et al. 2013

Plant Soil

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Aims Phytoextration of metal polluted soils using hyperaccumulators is a promising technology but requires long term successive cropping. This study investigated the dynamics of plant metal uptake and changes in soil metals over a long remediation time. Methods A soil slightly polluted with metals (S1) was mixed with highly polluted soil (S4) to give two intermediate pollution levels (S2, S3). The four resulting soils were repeatedly phyto-extracted using nine successive crops of Cd/Zn-hyperaccumulator Sedum plumbizincicola over a period of 4 years.Results Shoot Cd concentration decreased with harvest time in all soils but shoot Zn declined in S1 only. Similar shoot Zn concentrations were found in S2, S3 and S4 although these soils differed markedly in metal availability, and their available metals decreased during phytoextraction. A possible explanation is that plant active acquisition ability served to maintain plant metal uptake. Plant uptake resulted in the largest decrease in the acid-soluble metal fraction followed by reducible metals. Oxidisable and residual fractions were less available to plants. The coarse soil particle fractions made the major contribution to metal decline overall than the fine fractions. Conclusion Sedum plumbizincicola maintained long term metal uptake and the coarse soil particles played the most important role in phytoextraction.

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“…When exposed to natural weathering and chemical percolation, heavy metals, including Cd, Co, Cr, Cu, Mn, Ni, Pb, and Zn, become more soluble and mobile (Anju and Banerjee, 2010;García et al, 2005). Once leached, heavy metals would become the major sources of contamination, which seriously damage not only stream water and groundwater, but also the soil environment (Kim et al, 2009;Zhao et al, 2012;Zhuang et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

Metal recovery from the copper sulfide tailing with leaching and fractional precipitation technology

et al. 2014

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Comparison of two sequential extraction procedures for heavy metal partitioning in mine tailings

Cited by 127 publications

References 41 publications

Removal of Heavy Metals from Urban Stormwater Runoff Using Bioretention Media Mix

Removal of Heavy Metals from Urban Stormwater Runoff Using Bioretention Media Mix

Dynamics of plant metal uptake and metal changes in whole soil and soil particle fractions during repeated phytoextraction

Metal recovery from the copper sulfide tailing with leaching and fractional precipitation technology

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