Comparison of electrodialytic removal of Cu from spiked kaolinite, spiked soil and industrially polluted soil

Ottosen, Lisbeth M.; Lepková, Kateřina; Kubal, Martin

doi:10.1016/j.jhazmat.2005.04.044

Cited by 32 publications

(18 citation statements)

References 20 publications

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“…Solubility of cationic metals decreases with pH of medium, that is, desorption or extraction of metals from soil decreases with the pH of the aqueous stream. To control the pH of a soil system in electrokinetic remediation, various enhancement methods have been applied including conditioning the electrolyte pH [10,11], adding enhancing chemical reagents to improve metal solubility [12,13] and using ion selective membranes to exclude hydroxide ion migration from the cathode chamber into the soil [14][15][16]. However, anionic pollutants such as arsenic and fluoride could be desorbed or dissolved in alkaline conditions from soil mineral more than in acidic or a neutral condition [9].…”

Section: Introductionmentioning

confidence: 99%

Electrokinetic remediation of fluorine-contaminated soil: Conditioning of anolyte

Kim

Jeon

Baek

et al. 2009

Journal of Hazardous Materials

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Section: Introductionmentioning

confidence: 99%

Electrokinetic remediation of fluorine-contaminated soil: Conditioning of anolyte

Kim

Jeon

Baek

et al. 2009

Journal of Hazardous Materials

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“…Furthermore, desorption has mainly been examined using freshly spiked soils and the findings may not be comparable to old industrially polluted soil where the heavy metals can be adsorbed stronger due to aging. The importance of aging was illustrated in Ottosen et al (2006) where sequential extraction was used as a tool for comparing the adsorption strength for Cu in spiked soils and industrially polluted soils. The Cu was clearly adsorbed stronger in the industrially polluted soils than in the spiked soils even though the soil types were very similar.…”

Section: Introductionmentioning

confidence: 99%

Relation Between pH and Desorption of Cu, Cr, Zn, and Pb from Industrially Polluted Soils

Ottosen

Hansen

Jensen

2008

Water Air Soil Pollut

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Desorption of Cu, Cr, Pb, and Zn from industrially polluted soils as a result of acidification is in focus. The eight soils of the investigation vary greatly in composition and heavy metal concentration/ combination. Three soils had elevated concentrations of Cu, Pb, and Zn; regardless of pollution level, pollution origin, and soil type, the order for desorption as pH decreased was Zn>Cu>Pb. Turning to a single heavy metal in different soils, there was a huge difference in the pH at which the major desorption started. The variation was most significant for Pb where, e.g., less than 10% was desorbed at pH 2.5 from one soil, whereas in another soil 60% Pb was desorbed at this pH. Sequential extraction was made and the soils in which a high percentage of Pb was found in the residual phase (adsorbed strongest) was also the soils where less Pb was desorbed at low pH in the desorption experiments. It was evident that Cu, Pb, and Zn started to desorb at a higher pH from calcareous soils than from soils with low carbonate content. The mechanism responsible for this is coprecipitation of heavy metals in the carbonates. When the carbonates are dissolved at a relatively high pH of about 5, the co-precipitated heavy metals are released. The sequential extraction pattern for Cr differed generally much from the other heavy metals since the majority of Cr was extracted in the last two steps. Cr was also the heavy metal that desorbed the least at high acidification.

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“…Many methods have been applied to soil remediation, such as reverse osmosis, membrane filtration, and the adsorption method [6,7] -the most important physical-chemical method for its low cost, good effect, and high operability. There are a variety of adsorbing materials in soil remediation, which can be divided into three major categories: a) inorganic minerals including clay, activated carbon zeolite, and molecular sieve b) artificial synthetic materials, including polyvinyl resin and silicone resin c) biomass materials, including lignin, chitosan, and protein As one kind of biomass material, rabbit hair has very high protein content (about 93%) and relatively low crystalline content (13.84-15.50%) [8].…”

Section: Introductionmentioning

confidence: 99%

Rabbit Protein Adsorption Properties of Copper (II) Ion-Polluted Soil

Zhang¹,

Zhang²,

Yang³

2015

Pol. J. Environ. Stud.

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Soil polluted with heavy metal ions is a serious environmental problem. Rabbit protein, prepared by reduction method C, had excellent adsorption performance of heavy metal ions. The adsorption mechanism of rabbit protein was studied and the adsorption process could be well described by the quasi-secondary dynamics equation. When the dosing quantity of rabbit protein powder was 50 g/l and the adsorption time was 180 min, the removal rate of Cu 2+ reached 58.52%. Combining the zeolite powder and using the principle of electro spinning, the nano protein membrane was prepared to adsorb copper ion in the soil, which was efficient, low-cost, and achieved excellent adsorption effect. Hence it could be used as a new type of adsorption material to work out the pollution of heavy metals in the soil. Using waste to treat waste not only realized the reasonable use of a natural protein resource, but also had a certain practical significance on the safety of green organic food.

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Comparison of electrodialytic removal of Cu from spiked kaolinite, spiked soil and industrially polluted soil

Cited by 32 publications

References 20 publications

Electrokinetic remediation of fluorine-contaminated soil: Conditioning of anolyte

Electrokinetic remediation of fluorine-contaminated soil: Conditioning of anolyte

Relation Between pH and Desorption of Cu, Cr, Zn, and Pb from Industrially Polluted Soils

Rabbit Protein Adsorption Properties of Copper (II) Ion-Polluted Soil

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