Utilization of fly ash for stabilization/solidification of heavy metal contaminated soils

Dermatas, Dimitris; Meng, Xiaoguang

doi:10.1016/s0013-7952(03)00105-4

Cited by 488 publications

(249 citation statements)

References 3 publications

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“…2b). Generally, at highly alkaline condition (pH>9), Pb leachability was enhanced due to a dissolution of Pb particles (Dermatas & Meng 2003). However, this case was not true in this study.…”

Section: Quicklime Treatmentcontrasting

confidence: 56%

“…Stabilization/solidification (S/S) is gaining prominence in the treatment and remediation of hazardous wastes and contaminated soils due to its cost-effectiveness, rapid implementation and its use of well-established techniques (Palomo & Palacios 2003, Dermatas & Meng 2003, Terzano et al 2005). There are various techniques currently used for S/S, including pozzolanic, (cementitious or solidifying)-based solidifi-121 cation systems and chemical-based stabilization systems.…”

Section: Introductionmentioning

confidence: 99%

“…There are various techniques currently used for S/S, including pozzolanic, (cementitious or solidifying)-based solidifi-121 cation systems and chemical-based stabilization systems. The most commonly-applied pozzolanic materials are portland cement, lime, and/or fly ash (Palomo & Palacios 2003, Dermatas & Meng 2003, Terzano et al 2005. The pozzolanic-based S/S techniques immobilize contaminants by adsorption, incorporation into the pozzolanic products (e.g., calcium alumina hydrate C-A-H or calcium silicate hydrate C-S-H), or via precipitation as metal hydroxides under alkaline pH associated with cement and lime (Gougar et al 1996, Moulin et al 1999.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Immobilization of lead in shooting range soils by means of cement, quicklime, and phosphate amendments

Cao

Dermatas

et al. 2007

Environ Sci Pollut Res

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Section: Quicklime Treatmentcontrasting

confidence: 56%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Immobilization of lead in shooting range soils by means of cement, quicklime, and phosphate amendments

Cao

Dermatas

et al. 2007

Environ Sci Pollut Res

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“…On the other hand, different kinds of sorbents were studied. In this, hence, areca (a food waste), Iranian natural zeolite, bamboo charcoal, MWCNT, and fly ash, using for heavy metal removal [32][33][34][35], were checked as adsorbent. The obtained results were shown that the time of the proposed method is much shorter (50 min), and the amount of sorbent is significantly lower than other ones (0.001 g), which is indicative of efficiency of CMNTs (Table 3).…”

Section: Kinetic Modeling and Thermodynamic Of Adsorptionmentioning

confidence: 99%

Carboxylated carbon nanotubes as an efficient and cost-effective adsorbent for sustainable removal of insecticide fenvalerate from contaminated solutions

2016

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In this study, carboxylic multiwall carbon nanotubes (CMNTs) were used as an adsorbent for removing fenvalerate as a toxic insecticide from solution through batch experiments. The influence of four independent parameters of HCl, initial fenvalerate concentration, CMNTs dosage, and contact time on the fenvalerate adsorption process was investigated. Raman spectroscopy and thermogravimetric analysis confirmed that the adsorption and maximum adsorption capacity (40.0 mg g -1 ) showed high adsorption potential of the proposed sorbent. The kinetic, isothermic, and thermodynamic of fenvalerate adsorptionon CMNTs were evaluated to better understand this environmental friendly adsorption strategy. A pseudo-first-order kinetic described very well the experimental data of the adsorption kinetics. The experimental data found to be properly fitted to Freundlich model, which indicates that the sorption takes place on a heterogeneous material. The thermodynamic results showed the negative value of the standard free energy (DG 0 ) and standard enthalpy change (DH 0 ) showing an exothermic and spontaneous system. Repeated availability of adsorbent investigated and SEM and HRTEM of reused adsorbent showed stability and non-aggregatable attributes of CMNTs.

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“…The inorganic types Table 2. Density of materials of stabilizing agents which have been popularly applied for the purpose of slope stabilization are cement [3,6], lime [4,16,22], fly ash [8], organic polymers [14] and their mixtures [19,20,24]. These inorganic stabilizing agents are mainly used in non-ecological soil stabilization.…”

Section: Introductionmentioning

confidence: 99%

The Effect of HCWA-PFA Hybrid Geopolymer Modification on the Properties of Soil

Hassian

Cheah

2014

MATEC Web of Conferences

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Abstract. This study investigated the performance of the properties of foamed concrete when replacing volumes of cement of 10%, 15% and 20% by weight. A control unit of foamed concrete mixture made with Ordinary Portland Cement (OPC) as well as samples containing 10%, 15% and 20% silica fume were prepared. Three mechanical property parameters of foamed concrete containing different percentages of silica fume were studied: compressive strength, flexural strength and splitting tensile strength. Silica fume is commonly used to increase the mechanical properties of concrete materials as well as for economic concerns. The foamed concrete in this study was cured at a relative humidity of 70% and a temperature of ±28°C. Improvements in the mechanical properties of foamed concrete were due to a significant densification in the microstructure of the cement paste matrix in the presence of silica fume hybrid supplementary binder as observed from micrographs obtained in the study. The overall results showed that silica fume has great potential to be utilized in foamed concrete as there was a noticeable enhancement in thermal and mechanical properties with the addition of silica fume.

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Utilization of fly ash for stabilization/solidification of heavy metal contaminated soils

Cited by 488 publications

References 3 publications

Immobilization of lead in shooting range soils by means of cement, quicklime, and phosphate amendments

Immobilization of lead in shooting range soils by means of cement, quicklime, and phosphate amendments

Carboxylated carbon nanotubes as an efficient and cost-effective adsorbent for sustainable removal of insecticide fenvalerate from contaminated solutions

The Effect of HCWA-PFA Hybrid Geopolymer Modification on the Properties of Soil

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