Leaching of hexavalent chromium from young chromite ore processing residue.
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DOI: 10.1002/jeq2.20071
Abstract: Chromite ore processing residue (COPR) is a waste derived from the chromate extraction from roasted ores and is deposited in some countries in landfills. The objective of this study was to investigate the leaching characteristics… read more here.
Keywords: copr; ore processing; chromite ore; processing residue ... See more keywords
Reduction/immobilization of chromite ore processing residue using composite materials based geopolymer coupled with zero-valent iron
Sign Up to like & getrecommendations! Published in 2018 at "Ceramics International"
DOI: 10.1016/j.ceramint.2017.11.148
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)… read more here.
Keywords: reduction; copr; immobilization; ore processing ... See more keywords
Solidification/stabilization of chromite ore processing residue using alkali-activated composite cementitious materials.
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DOI: 10.1016/j.chemosphere.2016.10.067
Abstract: Chromite Ore Processing Residue (COPR) produced in chromium salt production process causes a great health and environmental risk with Cr(VI) leaching. The solidification/stabilization (S/S) of COPR using alkali-activated blast furnace slag (BFS) and fly ash… read more here.
Keywords: ore processing; solidification; chromite ore; processing residue ... See more keywords
Remediation of hexavalent chromium contamination in chromite ore processing residue by sodium dithionite and sodium phosphate addition and its mechanism.
Sign Up to like & getrecommendations! Published in 2017 at "Journal of environmental management"
DOI: 10.1016/j.jenvman.2017.01.031
Abstract: Large amounts of chromite ore processing residue (COPR) wastes have been deposited in many countries worldwide, generating significant contamination issues from the highly mobile and toxic hexavalent chromium species (Cr(VI)). In this study, sodium dithionite… read more here.
Keywords: addition; ore processing; sodium; remediation ... See more keywords
Detoxification and immobilization of chromite ore processing residue using the alkali-activated cementitious materials mixed with ascorbic acid.
Sign Up to like & getrecommendations! Published in 2020 at "Journal of environmental management"
DOI: 10.1016/j.jenvman.2020.110350
Abstract: The existence of leachable Cr(Ⅵ) in chromite ore processing residue (COPR) makes it hazardous waste. Therefore, resourceful utilization of COPR is necessary to protect the ecosystem and living biota from hazardous effect of Cr(Ⅵ) caused… read more here.
Keywords: copr; ore processing; detoxification immobilization; ascorbic acid ... See more keywords
Effect of Liquid Hot Water Pretreatment on Hydrolysates Composition and Methane Yield of Rice Processing Residue
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DOI: 10.3390/en14113254
Abstract: Lignocellulosic rice processing residue was pretreated in liquid hot water (LHW) at three different temperatures (140, 160, and 180 °C) and two pretreatment times (10 and 20 min) in order to assess its effects on… read more here.
Keywords: rice; methane yield; rice processing; processing residue ... See more keywords