Simultaneous removal of organic compounds and heavy metals from soils by electrokinetic remediation with a modified cyclodextrin

Maturi, Kranti; Reddy, Krishna R.

doi:10.1016/j.chemosphere.2005.08.037

Cited by 137 publications

(62 citation statements)

References 9 publications

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“…To date, numerous lab-scale studies have been performed to investigate the feasibility of using electrokinetic remediation to clean up soils contaminated with inorganic, organic, and radionuclides Ala 2005, 2006;Maturi and Reddy 2006;Saichek and Reddy 2005;Reddy et al , 2001aReddy et al ,b, 2003Chinthamreddy 1999a,b,c, 2000;Reddy and Shirani 1997;Yeung et al 1996;Acar and Alshawabkeh 1996a,b;Reed et al 1995;Rodsand et al 1995;Acar et al 1994;Ugaz et al 1994;Jensen et al 1994;Eykholt and Daniel 1994;Shapiro and Probstein 1993;Pamukcu and Wittle 1992;Bruell et al 1992;Hamed et al 1991). However, most of these studies were concerned with the residual contaminant distribution in the soil and the overall removal efficiency after the electrokinetic treatment.…”

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confidence: 99%

Geochemical assessment of metal transport in glacial till during electrokinetic remediation

Al-Hamdan

Reddy

2007

Environ Monit Assess

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This paper presents the chemical speciation and retention behavior of chromium (Cr), nickel (Ni), and cadmium (Cd) prior to and after the electrokinetic remediation in glacial till soil. The speciation of the metals was predicted using the chemical speciation program MINEQL(+). The simulations were performed for single-contaminant with only Cr(VI) or Ni, and multi-contaminants consisting of: (1) Cr(VI), Ni, and Cd; (2) Cr(III), Ni and Cd; (3) Cr(VI), Cr(III), Ni and Cd; (4) Cr(VI), Ni, and Cd with reducing agents; and (5) Cr(III), Ni, and Cd with oxidizing agent (Mn). The results showed that the speciation and distribution of cationic metals [Ni, Cd, and Cr(III)] in glacial till soil remain unaffected or slightly affected during electrokinetics. This is attributed to the high pH buffering capacity of the glacial till, leading the metals to precipitate in the soil prior to and after electrokinetics. This study showed that during electrokinetics, Cr(VI) existed as anionic complex and migrated towards the anode and the migration is maximum in case of a single-contaminant system. The study also showed that near the anode in the absence of any reducing and oxidizing agent, Cr(VI) mostly adsorbed, and some of Cr(VI) reduced to Cr(III) and migrated towards the cathode and finally precipitated due to high pH conditions. Ni and Cd remain adsorbed or precipitated due to the high pH conditions throughout the soil. Among the reducing agents, the sulfide had significant effect on the migration of metals compared to ferrous ions. While in the presence of oxidizing agent (Mn), no noticeable Cr(VI) was found in the soil sample indicating the reduction of Cr(VI) to Cr(III) and the predominance of reducing conditions due to the presence of naturally occurring iron in the glacial till soil. Overall, this study provides a reasonable explanation of the speciation and distribution of chromium, nickel and cadmium during the electrokinetic remediation of glacial till soil.

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confidence: 99%

Geochemical assessment of metal transport in glacial till during electrokinetic remediation

Al-Hamdan

Reddy

2007

Environ Monit Assess

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“…Surfactants, cosolvents and cyclodextrins (same as in washing technique) generally yielded beter results for phenanthrene removal, whereas chelating agents and organic acids yielded beter removal for Ni [55].…”

Section: Electrokinetic Processesmentioning

confidence: 99%

Dual Soil Decontamination Procedures

Mitoma¹,

Simion²,

Simion³

2016

Soil Contamination - Current Consequences and Further Solutions

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“…Cyclodextrins have been used to enhance the removal of hydrophobic organics such as phenanthrene [41], dinitrotoluene [42], the herbicide atrazine [43], and other contaminants [44] in real and model soils. In general, cyclodextrins are facilitating agents that improve the removal of organic contaminants from soil compared to other experiments with unenhanced electrokinetics, but results from cyclodextrin tests are usually less effective than test with surfactants, iron nanoparticles or with chemical oxidants.…”

Section: Cyclodextrinsmentioning

confidence: 99%

Advances in Electrokinetic Remediation for the Removal of Organic Contaminants in Soils

Cameselle¹,

Gouveia²,

Akretche³

et al. 2013

Organic Pollutants - Monitoring, Risk and Treatment

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Simultaneous removal of organic compounds and heavy metals from soils by electrokinetic remediation with a modified cyclodextrin

Cited by 137 publications

References 9 publications

Geochemical assessment of metal transport in glacial till during electrokinetic remediation

Geochemical assessment of metal transport in glacial till during electrokinetic remediation

Dual Soil Decontamination Procedures

Advances in Electrokinetic Remediation for the Removal of Organic Contaminants in Soils

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