Effect of different extraction agents on metal and organic contaminant removal from a field soil

Khodadoust, Amid P.; Reddy, Krishna R.; Maturi, Kranti

doi:10.1016/j.jhazmat.2004.05.021

Cited by 128 publications

(75 citation statements)

References 17 publications

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“…However, the authors observed that the presence of surfactants tended to reduce the electric conductivity of the soil and the electro-osmotic low compared with the stages where citric acid was used as lushing solution. The results conirmed previous studies, in which the ability of surfactants, cosolvents, cyclodextrins, chelating agents and organic acids to remove Ni and phenanthrene from kaolin soil was tested [52,53]. EDT" was conirmed to produce complications during electrokinetic experiments [54].…”

Section: Electrokinetic Processessupporting

confidence: 83%

Dual Soil Decontamination Procedures

Mitoma¹,

Simion²,

Simion³

2016

Soil Contamination - Current Consequences and Further Solutions

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Section: Electrokinetic Processessupporting

confidence: 83%

Dual Soil Decontamination Procedures

Mitoma¹,

Simion²,

Simion³

2016

Soil Contamination - Current Consequences and Further Solutions

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“…The above spiking was intended to furnish about 500 mg/kg as target concentration. The parent and amended soils were characterized in terms of physicochemical properties -pH, textural analysis, soil organic matter, OM; cation exchange capacity and CEC (USEPA, 1995) and pseudototal Ni, Cu, Zn, Cd and Pb content (Khodadoust et al, 2005).…”

Section: Soil Sampling Spiking and Characterizationmentioning

confidence: 99%

“…Batch extractions of heavy metal contaminants using a common extractant concentration of 0.05M were conducted according to the procedure reported by Khodadoust et al (2005) with slight modifications using a soil:water ratio of 1:25 (i.e. 1 g of the soil with 25 mL of extracting solution).…”

Section: Soil Washing Experimentsmentioning

confidence: 99%

Removal of heavy metals from a contaminated soil using organic chelating acids

Wuana

Okieimen

Imborvungu

2010

Int. J. Environ. Sci. Technol.

287

139

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Changes in heavy metal speciation and uptake by maize in a soil before and after washing with chelating organic acids, citric acid, tartaric acid and ethylenediaminetetraacetic acid were assessed. A sandy loam was collected from the vicinity of the Benue industrial layout, Makurdi, Nigeria and spiked with a quinternary mixture of nickel, copper, zinc, cadmium and lead nitrates to achieve higher levels of contamination. Batch soil washing experiments performed on 1.0 g portions of the spiked soil using 0.05 M chelating agents at a solid:liquid ratio of 1:25 showed that washing efficiencies varied in the order: ethylenediaminetetraacetic acid> citric acid> tartaric acid with metal extraction yields typically following the sequence, copper> nickel> zinc> cadmium> lead. Sequential extractions proposed by the European Communities Bureau of Reference method used to assess the redistribution of heavy metal forms in the soil showed that apparent metal mobilities were reduced upon soil washing. Citric acid removed most of the metals hitherto associated with the exchangeable and reducible fractions; tartaric acid, the exchangeable metal pools; and ethylenediaminetetraacetic acid, the non-residual metal pools. Heavy metal assay of harvested biomass of maize grown on unwashed and washed soil samples indicated that metal transfer coefficients, decreased in the order of treatment: ethylenediaminetetraacetic acid

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“…Concern of the pollution caused by heavy metal-containing sludge has accentuated the need to carry out numerous investigations as well as to develop various methods/techniques to remove the toxic heavy metals from contaminated sites. Some of the popular methods include ion exchange (Parkpian et al 2002), Phyto-remediation (Neugschwandtner et al 2008) and chemistry (Sanchez-Martin et al 2007;Khodadoust et al 2005;Ito et al 2000, Naoum et al 2001Marchioretto et al 2002). Moreover soils are effective agents of heavy metal sorption, particularly soils with high contents of organic matter, clays and Fe, Al, Mn oxides and hydroxides (Tessier et al 1995;Gong and Donahoe 1997).…”

Section: Introductionmentioning

confidence: 99%

Efficiency of chelating agents in retaining sludge-borne heavy metals in intensively applied agricultural soils

Mosekiemang

Dikinya

2011

Int. J. Environ. Sci. Technol.

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This paper presents an evaluation of different chelating agents for their effectiveness in removing Cu, Co and Zn in three distinctly different types of sludge-amended soils. Soil types (Luvisol, Arenosol and Vertisol) were each mixed with an anaerobically digested sludge at a 1:1 ratio followed by leaching with three types of chelating agents, namely: ethylenediamine tetra acetic acid, nitrilotriacetic acid and acetic acid. Aqua regia method was used to quantify pseudo total metal before and after treatment. Generally, chelating agents can be out competed by soil colloids in attracting cations. The efficiency of chelating agents was found to follow this order ethylenediamine tetra acetic acid \ nitrilotriacetic = acetic acid in all the three metals, with ethylenediamine tetra acetic acid being the most effective chelating agent. More heavy metals were removed in Luvisol and Arenosol than in Vertisol implying that soils rich in clay fraction retain more cations than soils with minimal clay fraction. Similarly, copper responded positively to chelation than zinc and cobalt in Luvisols and Arenosols, although the results were not conclusive for Vertisols.

show abstract

Effect of different extraction agents on metal and organic contaminant removal from a field soil

Cited by 128 publications

References 17 publications

Dual Soil Decontamination Procedures

Dual Soil Decontamination Procedures

Removal of heavy metals from a contaminated soil using organic chelating acids

Efficiency of chelating agents in retaining sludge-borne heavy metals in intensively applied agricultural soils

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