Reduction/immobilization of chromite ore processing residue using composite materials based geopolymer coupled with zero-valent iron
Source abstract
Abstract
Abstract Chromite ore processing residue (COPR) is a hazardous waste due to the presence of highly mobile Cr(VI). In this paper, the reduction/immobilization of COPR using composite materials (fly ash, blast furnace slag and metakaolin) based geopolymer coupled with zero-valent iron (ZVI) was investigated. The effects of ZVI and acid dosages on the reduction of Cr(VI) in COPR had been analysed. The immobilization of original COPR samples and reduced COPR samples were prepared. The immobilization effect was evaluated by compressive strength and leaching tests. The results showed that geopolymer with reduced COPR had better immobilization effect as compared to original COPR. According to mechanical and leaching properties of geopolymer with reduced COPR samples as well as X-ray diffraction, scanning electron microscope with energy dispersive spectrometer and Fourier transform infrared spectrometry analyses, COPR was effectively immobilized.
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Research context
OpenAlex topics: Chromium effects and bioremediation · Environmental remediation with nanomaterials · Concrete and Cement Materials Research
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (39)
Show source-provided references
1. Evaluation of the treatment of chromite ore processing residue by ferrous sulfate and asphalt10.1016/j.jhazmat.2008.09.079 ↗
2. Assessment of calcium polysulfide for the remediation of hexavalent chromium in chromite ore processing residue (COPR)10.1016/j.jhazmat.2007.01.012 ↗
3. Mobilization of Cr(VI) from chromite ore processing residue through acid treatment10.1016/j.scitotenv.2007.10.041 ↗
4. Impact of brownmillerite hydration on Cr(VI) sequestration in chromite ore processing residue10.1007/s12303-011-0023-y ↗
5. Leaching mechanisms of Cr(VI) from chromite ore processing residue10.2134/jeq2007.0443 ↗
6. Strength, leachability and microstructure characteristics of cement-based solidified plating sludge10.1016/j.cemconres.2004.07.041 ↗
7. Mechanism for the stabilization/solidification of arsenic-contaminated soils with Portland cement and cement kiln dust10.1016/j.jenvman.2010.06.018 ↗
8. Treatment of chromite ore processing residue by pyrolysis with rice straw10.1016/j.chemosphere.2009.08.023 ↗
9. Remediation of chromite ore processing residue by hydrothermal process with starch10.1016/j.psep.2010.11.002 ↗
10. Factors affecting hazardous waste solidification/stabilization: a review10.1016/j.jhazmat.2006.01.065 ↗
11. Studying the effect of thermal and acid exposure on alkali-activated slag geopolymer10.1680/adcr.11.00052 ↗
12. Resistance of alkali activated water-cooled slag geopolymer to sulphate attack
13. Immobilization of strontium-loaded zeolite A by metakaolin based-geopolymer10.1016/j.ceramint.2016.12.092 ↗
14. Strength and microstructural properties of fly ash based geopolymer concrete containing high-calcium and water-absorptive aggregate10.1016/j.jclepro.2015.06.058 ↗
15. Synthesis and heavy metal immobilization behaviors of slag based geopolymer
16. and XPS study of immobilization of chromium with fly ash based geopolymers
17. Stabilization/solidification of a municipal solid waste incineration residue using fly ash-based geopolymers10.1016/j.jhazmat.2010.08.127 ↗
18. Geopolymers for immobilization of Cr6+, Cd2+, and Pb2+10.1016/j.jhazmat.2008.01.053 ↗
19. Immobilization of Cr6+, Cd2+, Zn2+ and Pb2+ in alkali-activated slag binders10.1016/S0008-8846(02)00904-3 ↗
20. Solidification/stabilization of chromite ore processing residue using alkali-activated composite cementitious materials10.1016/j.chemosphere.2016.10.067 ↗
21. Detoxification/immobilization of hexavalent chromium using metakaolin-based geopolymer coupled with ferrous chloride10.1016/j.jece.2016.03.038 ↗
22. Study on the properties of chromium residue-cement matrices (CRCM) and the influences of superplasticizers on chromium(VI)-immobilising capability of cement matrices10.1016/j.jhazmat.2008.05.117 ↗
23. Modelling of chromium behaviour and transport at sites contaminated with chromite ore processing residue: implications for remediation methods10.1023/A:1012257522421 ↗
24. Reduction/immobilization processes of hexavalent chromium using metakaolin-based geopolymer10.1016/j.jece.2016.11.028 ↗
25. CN-GB, Method of testing cements-Determination of strength (GB/T 17671-1999), 1999.
26. U.S Environmental Protection Agency, Toxicity Characteristic Leaching Procedure (Method 1311), 1992.
27. CN-HJ, Solid Waste-Extraction Procedure for Leaching Toxicity-sulphuric Acid and Nitric Acid Method (HJ/T 299-2007), 2007.
28. CN-GB, Solid Waste-Determination of chromium(VI)-1,5-Diphenylcarbohydrazide Spectrophotometric Method (GB/T 15555. 4-1995), 1995.
29. CN-HJ, Solid Waste-Determination of Total Chromium-Flame Atomic Absorption Spectrometry (HJ 749-2015), 2015.
30. Influence of complex reagents on removal of chromium(VI) by zero-valent iron10.1016/j.chemosphere.2008.04.010 ↗
31. Effects of particle size and acid addition on the remediation of chromite ore processing residue using ferrous sulfate10.1016/j.jhazmat.2009.02.012 ↗
32. Evaluation of ettringite and hydrocalumite formation for heavy metal immobilization: literature review and experimental study10.1016/j.jhazmat.2005.11.008 ↗
33. CN-GB, Identification Standards for Hazardous Wastes-Identification for Extraction Toxicity (GB5085.3-2007), 2007.
34. CN-HJ, Environmental Protection Technical Specifications for Pollution Treatment of the Chromium Residue (HJ/T 301-2007), 2007.
35. Assessment of ferrous chloride and Portland cement for the remediation of chromite ore processing residue10.1016/j.chemosphere.2015.04.050 ↗
36. Immobilization of chromium in cement matrices10.1016/0956-053X(94)90016-7 ↗
37. Effect of blast furnace slag grades on fly ash based geopolymer waste forms10.1016/j.fuel.2014.05.018 ↗
38. Activation of blast furnace slag by a new method10.1016/j.cemconres.2009.05.012 ↗
39. Immobilization of chromium (VI) evaluated by binding isotherms for ground granulated blast furnace slag and ordinary Portland cement10.1016/j.cemconres.2004.12.011 ↗