Metal-Contaminated Soils: Remediation Practices and Treatment Technologies

Dermont, Gérald; Bergeron, Mario; Mercier, Guy; Richer-Laflèche, Marc

doi:10.1061/(asce)1090-025x(2008)12:3(188)

Cited by 133 publications

(48 citation statements)

References 57 publications

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“…Toxic elements that remain untreated in soils and sediments represent a threat to surface and groundwater reserves. The persistent presence of mobile heavy metals in soils is a continuing challenge for authorities responsible for environmental protection [53,54].…”

Section: Remediation Of Heavy Metal Contaminated Soilsmentioning

confidence: 99%

Role of Phosphate in the Remediation and Reuse of Heavy Metal Polluted Wastes and Sites

Nzihou

Sharrock

2010

Waste Biomass Valor

111

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Heavy metal pollution is a major environmental concern because of the toxicity to humans and plants. This toxicity is lethal even in trace quantities and metals have a great tendency to bioaccumulate. The efficiency of phosphate and apatites M 10 (PO 4 ) 6 (OH) 2 , M: Metal, in particular, in removing and immobilizing heavy metals from wastewater, groundwater (as permeable reactive barriers for in situ site remediation), fly ash, dredged sludges and contaminated soil has led to various studies to understand and explain the mechanisms involved. This paper will address the use of apatite as sorbent and stabilizing agents for the removal of heavy metals from various media. Efficient physico-chemical immobilization of heavy metals brings new perspectives for reuse of polluted waste water, soils and land treated by selected phosphates.

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Section: Remediation Of Heavy Metal Contaminated Soilsmentioning

confidence: 99%

Role of Phosphate in the Remediation and Reuse of Heavy Metal Polluted Wastes and Sites

Nzihou

Sharrock

2010

Waste Biomass Valor

111

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“…Currently, physical processes such as excavation and disposal to landfill, thermal desorption and electrokinetic remediation are generally adopted but these methods are less attractive for widespread use because of high cost, manpower and material resources. Although the cost of bioremediation and 2 of 10 phytoremediation is lower than other remediation technologies, they are time-consuming and cannot satisfy the urgency of land development [8][9][10]. Compared with other remediation technologies, in-situ chemical stabilization/solidification is considered as a promising strategy with numerous advantages such as reduced risk to site workers, low cost and speed of implementation [11].…”

Section: Introductionmentioning

confidence: 99%

Lime and Phosphate Amendment Can Significantly Reduce Uptake of Cd and Pb by Field-Grown Rice

Xiao

Huang

et al. 2017

Sustainability

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Agricultural soils are suffering from increasing heavy metal pollution, among which, paddy soil polluted by heavy metals is frequently reported and has elicited great public concern. In this study, we carried out field experiments on paddy soil around a Pb-Zn mine to study amelioration effects of four soil amendments on uptake of Cd and Pb by rice, and to make recommendations for paddy soil heavy metal remediation, particularly for combined pollution of Cd and Pb. The results showed that all the four treatments can significantly reduce the Cd and Pb content in the late rice grain compared with the early rice, among which, the combination amendment of lime and phosphate had the best remediation effects where rice grain Cd content was reduced by 85% and 61%, respectively, for the late rice and the early rice, and by 30% in the late rice grain for Pb. The high reduction effects under the Ca + P treatment might be attributed to increase of soil pH from 5.5 to 6.7. We also found that influence of the Ca + P treatment on rice production was insignificant, while the available Cd and Pb content in soil was reduced by 16.5% and 11.7%, respectively.

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“…However, the metals may also exist in their particulate or low solubility forms [54][55][56][57], and a random distribution of particles that are rich in metals may appear in the soil rather than the sorbed state. Sequential extraction methods have often been used to evaluate the bioavailability and mobility of radionuclides in soils based on the distribution of the physico-chemical forms of radiocesium.…”

Section: The Distribution Of Solid-phase Cs In Soils: Similarities Bementioning

confidence: 99%

Temporal variations of accumulated cesium in natural soils after an uncharacteristic external exposure

Sawai

Rahman

et al. 2015

Microchemical Journal

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The accumulation behaviors and solid phase partitioning patterns of stable cesium, which have been recognized as an indicator of the long-term movement of radioactive cesium ( 137 Cs or 134 Cs) in ecosystems, were studied in typical and natural soils of Japanese origin, namely, red clay, leaf-mold and andosol soils. The retention and migration of soil-phase cesium have been explained relative to various factors, such as soil organic matter contents, competitive cation concentrations and the adsorption ratio of Cs to the solid phase. Cesium was adsorbed nearly quantitatively in the leaf-mold type soil, and the rate of Cs absorption increased as the particle size decreased in the red clay and andosol soils. The distributions of Cs within the soil solid phases were defined using the selective sequential extraction scheme and were used to explain its relative incorporation in the soil fractions. Solid phase fractionation indicated that nearly half of the total cesium concentrations in the soils were in the 'residual' fraction (representing the metal that was incorporated within the crystalline lattice of the soil and was difficult to extract). These findings are expected to provide information regarding suitable conditions for remediation, immobilization or the recovery of cesium from contaminated soils with excess cesium concentrations. KeywordsCesium; Accidental exposure; Soil contamination; Solid-phase distribution; Sequential fractionation; Temporal variation 2 Microchemical Journal, 118: 158-165, 2015 The original publication is available at: http://dx.doi.org/10.1016/j.microc.2014.09.006 IntroductionWaste disposal operations or accidental releases due to nuclear-technology-related activities have resulted in the release of large amounts of radionuclides into the environment. Among the radioactive materials, the dispersion of radiocesium at elevated concentrations evokes concern due to its extended solubility characteristics as an alkaline metal ion, its comparatively longer half-life, and its easy incorporation into living beings [8][9][10] The objective of this study is to investigate the cesium distribution in the operationally defined physico-chemical and particle size fractions of soils to understand the temporal variations of cesium after being released at an uncharacteristic rate. Experimental InstrumentsThe atomic absorption spectroscopy (AAS) technique was used to determine the stable cesium concentration in solution. An AAnalyst 600 (PerkinElmer, Waltham, MA) was used that was equipped with a transverse heated graphite atomizer with an integrated, pyrolytic graphite coated platform and a longitudinal Zeeman-effect background corrector. The light source was an electrodeless discharge lamp (EDL) that was powered by an EDL System II that was operated at 18 mA. The wavelength was set at the 852.1 nm resonance line and the monochromator spectral bandpass was set at 0.7 nm. In addition, a baseline offset correction time at 2.0 s was used with a read delay of 0.0 s. Argon was used as the purg...

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Metal-Contaminated Soils: Remediation Practices and Treatment Technologies

Cited by 133 publications

References 57 publications

Role of Phosphate in the Remediation and Reuse of Heavy Metal Polluted Wastes and Sites

Role of Phosphate in the Remediation and Reuse of Heavy Metal Polluted Wastes and Sites

Lime and Phosphate Amendment Can Significantly Reduce Uptake of Cd and Pb by Field-Grown Rice

Temporal variations of accumulated cesium in natural soils after an uncharacteristic external exposure

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