Immobilization of chromite ore processing residue with alkali-activated blast furnace slag-based geopolymer

Huang, Xianghua; Huang, Tao; Li, Shan; Muhammad, Faheem; Xu, Guojing; Zhao, Ziqiang; Yu, Lin; Yan, Yujie; Li, Dongwei; Jiao, Binquan

doi:10.1016/j.ceramint.2016.03.033

Cited by 118 publications

(25 citation statements)

References 23 publications

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“…Table 2, I-6) when the % (w/w) COPR in GP increased from 10 to 60%. This indicated that 60% (w/w) COPR could be effectively solidified with leaching concentration of Cr below the recommended limit (5 mg/L) [26]. .…”

Section: Immobilization Of Pollutants In Geopolymeric Materials 31 mentioning

confidence: 88%

Solidification Versus Adsorption for Immobilization of Pollutants in Geopolymeric Materials: A Review

El‐Eswed¹

2018

Solidification

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Geopolymer (GP) is a class of three-dimensional aluminosilicate binder, which is superior to Portland cement materials in acid, heat and fire resistance. GP is produced by reacting an aluminosilicate source (metakaolin, fly ash or waste) with an alkali metal hydroxide or silicate. The aim of the present work is to review the latest developments in three lines of research that deal with application of GP in treatment of pollutants. The first "intra-solidification" that involves mixing real waste (containing heavy metal pollutants) with the GP precursors to obtain a high mechanical strength material. The second type of solidification is "inter-solidification" that involves incorporation of heavy metals solutions (as simulation of polluted water) during geopolymerization reaction. The third line of research "adsorption" involves agitating GP with heavy metals solutions and studying the ability of GP to remove heavy metals from water. These techniques will be investigated regarding efficiency and mechanism of immobilization, cost and environmental impact. GPs are strong low-cost adsorbents for heavy metals. In intra-solidification, despite the high mechanical strength of the produced GPcontaining waste, geopolymerization reduces effectively the leaching of heavy metals. The reverse was observed in the case of inter-solidification which presents a greater challenge than intra-solidification.

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Section: Immobilization Of Pollutants In Geopolymeric Materials 31 mentioning

confidence: 88%

Solidification Versus Adsorption for Immobilization of Pollutants in Geopolymeric Materials: A Review

El‐Eswed¹

2018

Solidification

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“…Meanwhile, ettringite (AFt) and gismondine are also found in the CFBCFA based solidified bodies, resulting from the hydration reaction between the Ca(OH) 2 and the other active components in the ground mixture, which are helpful to hold the heavy metals in the crystalline structure with their ions exchange abilities [20,21]. Furthermore, C-S-H could be found in the CFBCFA and cement based solidified bodies, which is responsible for the strength development and heavy metals encapsulation [22]. In fact, FS, AFt and C-S-H are the predominant phases or hydration products in cement and CFBCFA based solidified bodies, implying that the similar hydration behavior occurs during the two solidification processes.…”

Section: X-ray Diffraction Analysismentioning

confidence: 99%

Solidification of Municipal Solid Waste Incineration Fly Ash through Co-Mechanical Treatment with Circulation Fluidized Bed Combustion Fly Ash

Yao

Qin

et al. 2019

Materials

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This study aims to explore the solidification performance of municipal solid waste incineration fly ash (MSWIFA) through co-mechanical treatment with circulation fluidized bed combustion fly ash (CFBCFA). The mineral characterization, physical properties, and leaching resistance of the solidified bodies are investigated by X-ray diffraction spectroscopy (XRD), Fourier transform infrared spectroscopy (FT-IR), Thermogravimetry-differential thermal analysis (TG-DTA), compressive strength, porosity, and leaching test, respectively. C-S-H, ettringite (AFt), and Friedel's salt (FS) are the predominant hydrate products in the CFBCFA based solidified bodies, which are similar to the cement based solidified bodies. However, CFBCFA based solidified bodies exhibit higher compressive strength (36.7 MPa) than cement based solidified bodies (11.28 MPa), attributing to the three reasons: lower porosity and more compact internal structure of CFBCFA based solidified bodies; large amounts of Ca(OH) 2 originating from MSWIFA are conducive to promoting the hydration reaction extent and compressive strength of the CFBCFA based solidified bodies; excessive Ca(OH) 2 would cause compressive strength deterioration for the cement based solidified bodies. The heavy metals (Zn, Cu, Cr, Cd, and Pb) concentrations in the extraction solution of the CFBCFA based solidified bodies are far below the requirements of Chinese National Standard GB 5085.3-2007. The solidification of MSWIFA through co-mechanical treatment could be an ideal substitute for cement solidification technology.

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“…5,7,8 In contrast, solidication/stabilization is not only an effective technique to cope with various kinds of the waste but also an economical method. [9][10][11] This technique utilizes the different nature of cementitious materials, namely, Ordinary Portland Cement (OPC) and geopolymer to solidify wastes and HMs.…”

Section: Introductionmentioning

confidence: 99%

Solidification of electroplating sludge with alkali-activated fly ash to prepare a non-burnt brick and its risk assessment

Xia

Muhammad

et al. 2020

RSC Adv.

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Immobilization of chromite ore processing residue with alkali-activated blast furnace slag-based geopolymer

Cited by 118 publications

References 23 publications

Solidification Versus Adsorption for Immobilization of Pollutants in Geopolymeric Materials: A Review

Solidification Versus Adsorption for Immobilization of Pollutants in Geopolymeric Materials: A Review

Solidification of Municipal Solid Waste Incineration Fly Ash through Co-Mechanical Treatment with Circulation Fluidized Bed Combustion Fly Ash

Solidification of electroplating sludge with alkali-activated fly ash to prepare a non-burnt brick and its risk assessment

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