A comparative study on Cu, Cr and As removal from CCA-treated wood waste by dialytic and electrodialytic processes

Velizarova, Emiliya; Ribeiro, Alexandra B.; Ottosen, Lisbeth M.

doi:10.1016/s0304-3894(02)00063-8

Cited by 37 publications

(36 citation statements)

References 12 publications

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“…Electrodialysis has previously been used to remove heavy metals from solid materials [1][2][3][4][5][6][7]. The method is based on the principles of electrokinetic remediation (EKR) in which an electric field of low level current is applied to the polluted material, conducted by the pore water or suspension liquid in the solid material.…”

Section: Introductionmentioning

confidence: 99%

An optimised method for electrodialytic removal of heavy metals from harbour sediments

Pedersen

Jensen

Ottosen

et al. 2015

Electrochimica Acta

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Section: Introductionmentioning

confidence: 99%

An optimised method for electrodialytic removal of heavy metals from harbour sediments

Pedersen

Jensen

Ottosen

et al. 2015

Electrochimica Acta

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“…Hence, the accumulation and distribution are presented as the major electrokinetic treatment assessment tool (Table IV). The highest accumulation values for copper and iron at a final pH of 7.7 and 2.5 in the sludge cake corresponded to the abundance of soluble and mobile species at these pH values (Table IV) as also observed by Kim et al (2002), Velizarova et al (2002) and Acar et al (1993). The latter indicates that future optimization of the migration of charged contaminants out of sludge matrixes need to improve their solubility.…”

Section: Practical Application Of Electrokinetics For Sludge Clean-upmentioning

confidence: 59%

“…The increase in voltage (Figure 2) means that the H + front formed at the anode migrates through the sludge , Velizarova et al, 2002. Therefore, the increase in the resistance may be attributed to copper and iron precipitates in high pH areas.…”

Section: Variation Of the Overall Voltagementioning

confidence: 99%

“…One of these emerging technologies are electrokinetic remediation techniques, which offer a great potential for the removal of charged contaminants from sludge (Kim et al, 2002), soil (Virkutyte et al, 2004;Ottosen et al, 2002;Acar and Alshawabkeh, 1993) and timber waste (Velizarova et al, 2002). The electrokinetic process employs a low-level direct current across the contaminated medium, which induces the mobility of charged contaminants due to electromigration and electroosmotic flow (Virkutyte et al, 2004;Haran et al, 1996;Mattson and Lindgren, 1995).…”

Section: Introductionmentioning

confidence: 99%

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Electrokinetic Copper and Iron Migration in Anaerobic Granular Sludge

Virkutytė

Sillanpää

Lens

2006

Water Air Soil Pollut

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Abstract. The application of low-level direct electric current (0.15 mA cm −2 ) as an electrokinetic technique to treat copper-contaminated mesophilic anaerobic granular sludge was investigated. The sludge was obtained from a full scale UASB reactor treating paper-mill wastewater and was artificially contaminated by Cu(NO 3 ) 2 or CuEDTA 2− with initial copper concentrations of 1000 mg · kg −1 wet sludge. The effect of different electrokinetic cell layouts, pH and EDTA concentrations on the migration of copper and iron during electrokinetic treatment were evaluated. Both, the pH of the sludge cake or the copper complexation with EDTA significantly affected the migration direction of copper.In an 'open' cell (sludge cake in direct contact with air), the highest copper mobility was observed at pH 2.5 in both Cu(NO 3 ) 2 or CuEDTA 2− amended sludge. The highest copper accumulation was at the cathode (22 ± 2)% with CuEDTA 2− as contaminant. In a 'closed' cell (sludge cake not in contact with air), the highest accumulation was obtained for CuEDTA 2− at the anode and amounted to 4(± 0.5)% and 2(± 0.05)%, respectively, at a final pH of 4.2 and 7.7 in the sludge cake.

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“…In real wastewaters the arsenic content is higher than copper. Equally, it is possible to separate copper from arsenic by ED on wood preservation contaminated soil or residues (Velizarova et al, 2002). ED has previously been shown as a method to separate sulfuric acid from very acidic sulfide smelter wastewaters (Cifuentes et al, 2002).…”

Section: Second Stage: Electrodialytic Separation Of Copper From Arsenicmentioning

confidence: 99%

A new process for sustainable wastewater treatment in Chilean copper smelters

2015

EJSD

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An actual Chilean copper smelter wastewater treatment is a complex process that actually mostly is focused on fulfillment of threshold values more than sustainability. The actual wastewater treatment includes a number of precipitation, neutralization, clarifying and filtering steps. This manuscript proposes a new sustainable process that would eliminate/reduce several of the disadvantages in an actual copper wastewater treatment such as a) reduced lime addition, b) a separate gypsum and heavy metal/arsenic precipitation, c) an electrodialysis stage that would recover copper, d) an easier ferric ion dosage for arsenic removal by electrocoagulation, and e) a less reagent consuming neutralization step.

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A comparative study on Cu, Cr and As removal from CCA-treated wood waste by dialytic and electrodialytic processes

Cited by 37 publications

References 12 publications

An optimised method for electrodialytic removal of heavy metals from harbour sediments

An optimised method for electrodialytic removal of heavy metals from harbour sediments

Electrokinetic Copper and Iron Migration in Anaerobic Granular Sludge

A new process for sustainable wastewater treatment in Chilean copper smelters

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