Leaching of hexavalent chromium from young chromite ore processing residue.
Sign Up to like & getrecommendations! Published in 2020 at "Journal of environmental quality"
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
Assessing chromite ore processing residue (COPR) waste dump site using electrical resistivity tomography (ERT): a case study from Umaran, Kanpur, India
Sign Up to like & getrecommendations! Published in 2019 at "Environmental Monitoring and Assessment"
DOI: 10.1007/s10661-019-7646-2
Abstract: Leaching of chromium ions causes a serious threat to groundwater around chromite ore processing residue (COPR) dump sites in many countries. As a result, detailed subsurface characterization of the affected region is crucial for assessing… read more here.
Keywords: resistivity; study; dump site; dump ... See more keywords
Processing of Low-Grade Chromite Ore for Ferroalloy Production: A Case Study from Ghutrigaon, Odisha, India
Sign Up to like & getrecommendations! Published in 2020 at "Transactions of the Indian Institute of Metals"
DOI: 10.1007/s12666-020-02032-5
Abstract: The low-grade siliceous chromite ore from Ghutrigaon, Odisha, India, containing ~ 16% Cr2O3, with Cr/Fe ratio of 1.97 and ~ 55% of SiO2, does not find any use in metallurgical industry and hence considered as waste. Mineralogical… read more here.
Keywords: chromite; odisha india; chromite ore; processing low ... See more keywords
Kinetic Studies on the Reduction of Iron Oxides in Low-Grade Chromite Ore by Coke Fines for Its Beneficiation
Sign Up to like & getrecommendations! Published in 2018 at "Arabian Journal for Science and Engineering"
DOI: 10.1007/s13369-018-3324-x
Abstract: In a novel method of beneficiation of low-grade chromite ore, nuggets, 25 mm in diameter and 10 mm long, made of chromite ore and coke fines, are subjected to partial reduction. A significant degree of reduction of… read more here.
Keywords: reduction; grade chromite; chromite ore; ore coke ... 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.
Sign Up to like & getrecommendations! Published in 2017 at "Chemosphere"
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
Studies on flocculation characteristics of chromite’s ore process tailing: Effect of flocculants ionicity and molecular mass
Sign Up to like & getrecommendations! Published in 2018 at "Colloids and Surfaces A: Physicochemical and Engineering Aspects"
DOI: 10.1016/j.colsurfa.2017.10.069
Abstract: Abstract At the moment, it is vital for mineral industries to abide environmental regulation to dispose of the wastes generated in the beneficiation process. The redesign of dewatering process is required to meet the present… read more here.
Keywords: characteristics chromite; ionicity molecular; process; ore process ... See more keywords
Efficient utilization of nickel rich Chromite Ore Processing Tailings by carbothermic smelting
Sign Up to like & getrecommendations! Published in 2021 at "Journal of Cleaner Production"
DOI: 10.1016/j.jclepro.2021.128046
Abstract: Abstract Chromite ore processing tailing, a solid waste generated during the processing of chromite ore, is difficult to recover due to its ultra-fine size. The tailings generated from the process contains valuable chromite and iron-bearing… read more here.
Keywords: chromite ore; efficient utilization; chromite; ore processing ... 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
Biosurfactants enhanced electrokinetic treatment of Cr from chromite ore processing residue based on chemical fractions
Sign Up to like & getrecommendations! Published in 2020 at "Journal of water process engineering"
DOI: 10.1016/j.jwpe.2020.101252
Abstract: Abstract This study investigated the electrokinetic (EK) treatment of Cr from chromite ore processing residue (COPR) using rhamnolipid as the electrolyte. Chemical fractions were analyzed to better understand the transformation and migration of Cr from… read more here.
Keywords: electrokinetic treatment; ore processing; treatment; chemical fractions ... See more keywords