Efficiency modeling of solidification/stabilization of multi-metal contaminated industrial soil using cement and additives

Voglar, Grega E.; Leštan, Domen

doi:10.1016/j.jhazmat.2011.05.089

Cited by 45 publications

(22 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These control samples under curing condition 2 showed stable hydrated phases C 3 AH 6 and AH 3 (gibbsite) as significantly present compounds (Fig. 3).…”

Section: Control Groupmentioning

confidence: 91%

“…17), it could be seen, in the case of copper, Cu(OH) 2 and Cu 4 (NO 3 ) 2 (OH) 6 . Additionally, by FTIR-ATR (Figure 18a), the appearance of an absorption band (ca.…”

Section: Sorption Studiesmentioning

confidence: 93%

“…Cement is the most adaptable binder currently available for this immobilization. A growing number of papers have dealt with this subject, mainly using ordinary Portland cement (OPC), some of its phases or OPC modified by calcium aluminate, calcium sulphate, and/or admixtures [1][2][3][4][5][6][7], occasionally forming new phases with the metallic cations. In addition, G. Qian and co-workers have extensively studied the S/S processes of toxic metals in fly ashcalcium sulfoaluminate cement, Friedel's salt or fly ashes [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

“…Different calcium aluminate compounds, such as CA, CA 2 and C 12 A 7, exist, the reactivity increasing when CaO content rises. CAC reaction with water usually leads to the formation of metastable hexagonal phases, CAH 10 and C 2 AH 8 and amorphous aluminium hydroxide, which is followed by the formation of the stable cubic phases C 3 AH 6 and AH 3 at higher temperature and in the presence of humidity. This process is associated with an increase in porosity -owing to a contraction in the volume of solidsand a subsequent decrease in strength [12][13].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Solidification/stabilization of toxic metals in calcium aluminate cement matrices

Navarro-Blasco

Durán

Sirera

et al. 2013

Journal of Hazardous Materials

View full text Add to dashboard Cite

The ability of calcium aluminate cement (CAC) to encapsulate toxic metals (Pb, Zn and Cu) was assessed under two curing conditions. Changes in the consistency and in the setting time were found upon the addition of the nitrates of the target metals. Both Pb and Cu caused a delay in CAC hydration, while Zn accelerated the stiffening of the mortar. Compressive strengths of the metal-doped mortars, when initially cured at 60ºC/100% RH, were comparable with that of the free-metal mortar. Three different pore size distribution patterns were identified and related to the compounds identified by XRD and SEM. Sorbent capacities of CAC for the toxic metals were excellent: a total uptake was achieved for up to 3 wt.% loading of the three metals. In this way, CAC mortars were perfectly able to encapsulate the toxic metals, allowing the use of CAC for waste management as proved by the leaching tests.

show abstract

“…These control samples under curing condition 2 showed stable hydrated phases C 3 AH 6 and AH 3 (gibbsite) as significantly present compounds (Fig. 3).…”

Section: Control Groupmentioning

confidence: 91%

“…17), it could be seen, in the case of copper, Cu(OH) 2 and Cu 4 (NO 3 ) 2 (OH) 6 . Additionally, by FTIR-ATR (Figure 18a), the appearance of an absorption band (ca.…”

Section: Sorption Studiesmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Solidification/stabilization of toxic metals in calcium aluminate cement matrices

Navarro-Blasco

Durán

Sirera

et al. 2013

Journal of Hazardous Materials

View full text Add to dashboard Cite

show abstract

“…In this study stabilization was used in order to remediate cadmium contaminated sediment, since this is a widely accepted treatment process for the immobilization of heavy metals contained in wastes [11,21,31].…”

Section: Introductionmentioning

confidence: 99%

Immobilization of Cadmium from Contaminated Sediment Using Cardboard Mill Sludge

Prica¹,

Dalmacija²,

Dalmacija³

et al. 2012

Archives of Environmental Protection

View full text Add to dashboard Cite

Abstract:Sludge from cardboard mill is most commonly landfi lled, but it could also be recycled on-site into production or reused in some other way. In this study the use of sludge from cardboard mill as stabilizing agent in the stabilization treatment of cadmium polluted sediment was examined. The effectiveness of treatment and long-term leaching behavior of cadmium was evaluated by determining the cumulative percentage of cadmium leached, diffusion coeffi cients (De) and by applying different leaching tests (semi-dynamic test, toxicity characteristic leaching procedure, waste extraction test). In order to simulate the "worst case" leaching conditions, the semi-dynamic leaching test was modifi ed using 0.014 M acetic acid (pH = 3.25) and humic acids solution (20 mg l -1 TOC) as leachants instead of deionized water. A diffusion-based model was used to elucidate the controlling leaching mechanisms. Applied treatment was effective in immobilizing cadmium irrespective of high availability in the untreated sample. The controlling leaching mechanism appeared to be diffusion, which indicates that a slow leaching of cadmium could be expected when the cardboard mill sludge as stabilization agent is applied.

show abstract

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

View full text Add to dashboard Cite

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

show abstract

Efficiency modeling of solidification/stabilization of multi-metal contaminated industrial soil using cement and additives

Cited by 45 publications

References 31 publications

Solidification/stabilization of toxic metals in calcium aluminate cement matrices

Solidification/stabilization of toxic metals in calcium aluminate cement matrices

Immobilization of Cadmium from Contaminated Sediment Using Cardboard Mill Sludge

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

Contact Info

Product

Resources

About

Efficiency modeling of solidification/stabilization of multi-metal contaminated industrial soil using cement and additives

Cited by 45 publications

References 31 publications

Solidification/stabilization of toxic metals in calcium aluminate cement matrices

Solidification/stabilization of toxic metals in calcium aluminate cement matrices

Immobilization of Cadmium from Contaminated Sediment Using Cardboard Mill Sludge

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

Contact Info

Product

Resources

About

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