Remediation technologies for metal-contaminated soils and groundwater: an evaluation

Mulligan, Catherine N.; Yong, Raymond N.; Gibbs, Bernard F.

doi:10.1016/s0013-7952(00)00101-0

Cited by 1,274 publications

(629 citation statements)

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“…Most hyperaccumulators, such as Thlaspi, Urtica, Chenopodium, Polygonum sachalase and Alyssim are characterized by slow growth and low-biomass production, which make these plants impractical for use in phytoextraction in the field (Mulligan et al, 2001;Puschenreiter et al, 2001). For this reason, more recent research projects on phytoextraction have focused on high biomass crop species, such as maize (Zea mays), peas (Pisum sativum), oats (Avena sativa), barley (Hordeum vulgare) and Indian mustard (Brassica juncea), and on relevant plant husbandry and soil management practices to enhance the metal uptake of these high biomass species (Blaylock et al, 1997;Huang et al, 1997;Ebbs and Kochian, 1998;Shen et al, 2002;Chen et al, 2004a).…”

Section: Introductionmentioning

confidence: 99%

Enhanced phytoextraction of Cu, Pb, Zn and Cd with EDTA and EDDS

2005

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Chemically enhanced phytoextraction has been proposed as an effective approach to removing heavy metals from contaminated soil through the use of high biomass plants.Using pot experiments, the effects of the application of EDTA, EDDS and citric acid on the uptake of Cu, Pb, Zn and Cd by corn (Zea mays L. cv. Nongda 108) and bean (Phaseolus vulgaris L. white bean) plants were studied. The results showed that EDDS was more effective than EDTA at increasing the concentration of Cu in corn and beans.The application of 5 mmol kg -1 soil EDDS application to soil significantly increased concentrations of Cu in shoots , with maximum levels of 2060 and 5130 mg kg -1 DW in corn and beans, respectively, which were 45-fold and 135-fold higher than that in the corresponding control plants to which chelate had not been applied. Concentrations of Zn in shoots were also higher in the plants treated with EDDS than in those treated with EDTA. For Pb and Cd, EDDS was less effective than EDTA. The maximum Cu This is the Pre-Published Version.2 phytoextraction was found with the EDDS treatment. The application of EDTA and EDDS also significantly increased the shoot-to-root ratios of the concentrations of Cu, Pb, Zn and Cd in both plant species. The results of metal extraction with chelates showed that EDDS was more efficient at solubilizing Cu and Zn than EDTA, and that EDTA was better at solubilizing Pb and Cd than EDDS.

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Section: Introductionmentioning

confidence: 99%

Enhanced phytoextraction of Cu, Pb, Zn and Cd with EDTA and EDDS

2005

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“…Our study reports the results of laboratory tests in order to assess the applicability of Soil Flushing Reclamation Technology (Mulligan et al 2001). Nevertheless, flushing technology is based on the continuous flow of the flushing solution through the contaminated porous material layer.…”

Section: Introductionmentioning

confidence: 99%

The applicability of soil flushing technology in a metallurgical plant

Manca

Caredda

Orrù

2018

Int J Coal Sci Technol

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Soil flushing technology is an 'in situ' remediation technique involving the injection of a liquid solution. Applications of the soil flushing technique depend on the leachability of the pollutants and the environmental compatibility and total volumes of the solutions used. Therefore, experiments should consider these aspects by simulating the real phenomenon and using the most suitable reagents for the leachability of the different mineralogical forms present. Thirtyone laboratory tests were carried out (in batch and becker) to the complete exhaustion of the leaching capacity according to pH measurements. The reaction kinetics were studied by producing more than 300 solution samples during which the principal heavy metal concentrations, pH and Eh were measured. Leaching solutions containing various concentrations of hydrochloric, sulphuric, nitric and acetic acids were used. Mercury was leached using potassium iodide and acetic acid (pH 2). Analytes such as arsenic, cadmium, mercury, lead, selenium and zinc proved to be leachable in the investigated soil layer. However, high removal efficiencies could be obtained using different typological solutions, concentrations and volumes. The paper discusses the applicability of the soil flushing technique for different heavy metal contents and pH conditions of the flushing solution.

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“…However, these conventional methods have many disadvantages including incomplete metal removal, requirement of expensive equipment and monitoring systems 1,3, 16 . As a result of the expensive nature of the use of the conventional methods, in recent years, attention has been focused on the potential of Green Chemistry for removal of copper from aqueous solution using adsorbents derived from low-cost materials.…”

Section: Introductionmentioning

confidence: 99%

Biosorptive Removal of Cu(II) from Aqueous Solutions by Using Carissa carandas and Syzygium aromaticum

Mathew¹,

Lofrano²,

Sharma³

2014

Chem Sci Trans

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Biosorption of copper from aqueous solutions by Carissa carandas and Syzygium aromaticum was investigated in batch mode. Biosorptivity of both of these biosorbents has been correlated with the pH change, agitation time and dose of adsorbent and concentration of metal ions in the solution. Biosorbent Carissa carandas leaf powder showed higher sorption efficiency than that of biosorbent Syzygium arometicum powder under identical experimental conditions. Also, the adsorption of Cu(II) onto Syzygium arometicum was best described by the Langmuir isotherm model. The maximum adsorption capacities estimated from Langmuir isotherm model for Cu(II) were 54.2 mg/g and 76.61 mg/g for Carissa carandas and Syzygium arometicum respectively.

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Remediation technologies for metal-contaminated soils and groundwater: an evaluation

Cited by 1,274 publications

References 20 publications

Enhanced phytoextraction of Cu, Pb, Zn and Cd with EDTA and EDDS

Enhanced phytoextraction of Cu, Pb, Zn and Cd with EDTA and EDDS

The applicability of soil flushing technology in a metallurgical plant

Biosorptive Removal of Cu(II) from Aqueous Solutions by Using Carissa carandas and Syzygium aromaticum

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