Parameters controlling the release of hazardous waste (Ni2+, Pb2+ and Cr3+) solidified/stabilized by cement-CEM I

Belebchouche, Cherif; Moussaceb, Karim; Tahakourt, Abdelkader; Aït‐Mokhtar, Abdelkarim

doi:10.1617/s11527-014-0315-6

Cited by 20 publications

(19 citation statements)

References 33 publications

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“…Several studies carried out has confirmed that this simplified method was quite adequate in the assessment of the “open” porosity of the leached samples (based on hydraulic binders). The porosity of the saturated material can be determined .

ɛ_{i} = WAC (%) * d,

d is the relative material density (monolithic blocks).…”

Section: Methodsmentioning

confidence: 82%

“…The porosity (E i ) of the material S/S is assessed by determining its water absorption capacity (WAC). Several studies carried out [15] has confirmed that this simplified method was quite adequate [9,11,13] in the assessment of the "open" porosity of the leached samples (based on hydraulic binders). The porosity of the saturated material can be determined [9,11,[13][14][15][16].…”

Section: Water Absorption Capacity (Wac)mentioning

confidence: 93%

“…The WAC of solidified/stabilized waste is determined during the MLT. It is calculated as follows:

WAC = true[(m_{normalf} + true \sum f_{normali} + true \sum p_{normali} - m_{0 S}) / m_{0 S} true] \times 100,

where m f (kg) is the final mass of the sample, f i (kg) is the mass of dried residue, p i (kg) is the dry mass of particles retained by the filter paper, and m 0 S (kg) is the initial mass of the sample (before leaching) .…”

Section: Methodsmentioning

confidence: 99%

“…where m f (kg) is the final mass of the sample, f i (kg) is the mass of dried residue, p i (kg) is the dry mass of particles retained by the filter paper, and m 0S (kg) is the initial mass of the sample (before leaching) [8,9,11]. The porosity (E i ) of the material S/S is assessed by determining its water absorption capacity (WAC).…”

Section: Water Absorption Capacity (Wac)mentioning

confidence: 99%

See 3 more Smart Citations

Factors affecting the leaching of heavy metals (Ni⁺², Pb⁺², Cr⁺³) contained in sludge waste stabilization/solidification by hydraulic benders, Part I: water/cement and waste/cement ratio in S/S mortars

Chaabane

Moussaceb

Aït‐Mokhtar

2016

Env Prog and Sustain Energy

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The aim of the present paper is to investigate the effect of the water/cement ratio (w/c) (0.4 and 0.6) and the amount of hazardous waste (W/c) (10, 20, 25, 30, and 45%) incorporated on the leaching of heavy metals from a cementitious solidified materials. Mechanical strength of the S/S materials was evaluated at 28 days of cure. Specimens that have shown a good mechanical strength for the two water/cement ratios were used to make this study succeed. XRD analysis has shown the presence of heavy metals within the structure of S/S materials which explains immobilization of heavy metals contained in the waste by the S/S process. Amount of heavy metals released to the environment was evaluated by several leaching tests, namely, TCLP (toxicity characteristic leaching procedure), pore water (PW) and maximum mobile fraction (MMF), and monolithic leaching test (MLT). Monolithic specimens were evaluated under dynamic leaching conditions for 64 days with periodic leachant renewal on two aggressive media, sulfatic attack and in demineralized water. © 2016 American Institute of Chemical Engineers Environ Prog, 36: 93–103, 2017

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ɛ_{i} = WAC (%) * d,

d is the relative material density (monolithic blocks).…”

Section: Methodsmentioning

confidence: 82%

Section: Water Absorption Capacity (Wac)mentioning

confidence: 93%

“…The WAC of solidified/stabilized waste is determined during the MLT. It is calculated as follows:

WAC = true[(m_{normalf} + true \sum f_{normali} + true \sum p_{normali} - m_{0 S}) / m_{0 S} true] \times 100,

Section: Methodsmentioning

confidence: 99%

Section: Water Absorption Capacity (Wac)mentioning

confidence: 99%

See 2 more Smart Citations

Factors affecting the leaching of heavy metals (Ni⁺², Pb⁺², Cr⁺³) contained in sludge waste stabilization/solidification by hydraulic benders, Part I: water/cement and waste/cement ratio in S/S mortars

Chaabane

Moussaceb

Aït‐Mokhtar

2016

Env Prog and Sustain Energy

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“…It should be noted that this waste was characterized by Belebchouche et al . , since it is not the same sample and not the same sampling, some differences in the concentrations of heavy metals has been recorded.…”

Section: Methodsmentioning

confidence: 99%

Efficiency of stabilization/solidification of heavy metals contained in hydroxide sludge waste into metakaolin based geopolymers

Chaabane

Moussaceb

Aït‐Mokhtar

2018

Env Prog and Sustain Energy

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In this work, the S/S of heavy metals contained in hydroxide sludge waste was used into geopolymers. Metakaolin, sludge waste, hydroxide, and sodium silicate were mixed. Amount of waste added varied between 10% and 40% in the synthesis of geopolymers. Geopolymers were cured at 40°C for 24 h. After 7 and 28 days of aging, strength of the geopolymers specimen were studied. Mineralogical phases, morphology and FTIR analysis were used to characterize raw materials and geopolymers. TCLP test was used to determine amount of heavy metals released from S/S materials. Amount of heavy metals released are lower than quantities released from raw waste. Heavy metals were identified, by XRD analysis, within mineralogical phases. Results obtained shows that geopolymers can immobilize heavy metals and reduce their release to the environment. Mechanical strengths of all samples are higher than the lower required for the S/S processes. Best mechanical strength was of 9.29 and 10.02 MPa at 7 and 28 days, respectively. A decrease of mechanical strengths recorded is due to increasing amount of waste added that causes structural discontinuity within the gel during geopolymerization. © 2018 American Institute of Chemical Engineers Environ Prog, 38:e13137, 2019

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Influence of the Release Kinetics of Chemical Species on the Sustainability of Stabilized/Solidified Materials with Hydraulic Binder Subjected to Chemically Aggressive Environments

2019

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Parameters controlling the release of hazardous waste (Ni2+, Pb2+ and Cr3+) solidified/stabilized by cement-CEM I

Cited by 20 publications

References 33 publications

Factors affecting the leaching of heavy metals (Ni⁺², Pb⁺², Cr⁺³) contained in sludge waste stabilization/solidification by hydraulic benders, Part I: water/cement and waste/cement ratio in S/S mortars

Factors affecting the leaching of heavy metals (Ni⁺², Pb⁺², Cr⁺³) contained in sludge waste stabilization/solidification by hydraulic benders, Part I: water/cement and waste/cement ratio in S/S mortars

Efficiency of stabilization/solidification of heavy metals contained in hydroxide sludge waste into metakaolin based geopolymers

Influence of the Release Kinetics of Chemical Species on the Sustainability of Stabilized/Solidified Materials with Hydraulic Binder Subjected to Chemically Aggressive Environments

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Parameters controlling the release of hazardous waste (Ni2+, Pb2+ and Cr3+) solidified/stabilized by cement-CEM I

Cited by 20 publications

References 33 publications

Factors affecting the leaching of heavy metals (Ni+2, Pb+2, Cr+3) contained in sludge waste stabilization/solidification by hydraulic benders, Part I: water/cement and waste/cement ratio in S/S mortars

Factors affecting the leaching of heavy metals (Ni+2, Pb+2, Cr+3) contained in sludge waste stabilization/solidification by hydraulic benders, Part I: water/cement and waste/cement ratio in S/S mortars

Efficiency of stabilization/solidification of heavy metals contained in hydroxide sludge waste into metakaolin based geopolymers

Influence of the Release Kinetics of Chemical Species on the Sustainability of Stabilized/Solidified Materials with Hydraulic Binder Subjected to Chemically Aggressive Environments

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Factors affecting the leaching of heavy metals (Ni⁺², Pb⁺², Cr⁺³) contained in sludge waste stabilization/solidification by hydraulic benders, Part I: water/cement and waste/cement ratio in S/S mortars

Factors affecting the leaching of heavy metals (Ni⁺², Pb⁺², Cr⁺³) contained in sludge waste stabilization/solidification by hydraulic benders, Part I: water/cement and waste/cement ratio in S/S mortars