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
Environmental and human health risk assessment of potentially toxic elements in soil, sediments, and ore-processing wastes from a mining area of southwestern Tunisia
Sign Up to like & getrecommendations! Published in 2019 at "Environmental Geochemistry and Health"
DOI: 10.1007/s10653-019-00434-z
Abstract: The occurrence and bioaccessibility of potentially toxic elements (PTEs) in soils and sediments are investigated by many studies, especially in territories exploited by mining and ore-processing activities, nearby agriculture-driven rural cities. Accordingly, the present study… read more here.
Keywords: toxic elements; potentially toxic; ore processing; area ... 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
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
Cr(VI) recovery from chromite ore processing residual using an enhanced electrokinetic process by bipolar membranes
Sign Up to like & getrecommendations! Published in 2018 at "Journal of Membrane Science"
DOI: 10.1016/j.memsci.2018.07.079
Abstract: Abstract An electrokinetic (EK) system improved by a bipolar membrane (BPM) (BPM-EK) was used to recycle hexavalent chromium (Cr(VI)) from the chromite ore processing residual (COPR) in the form of H2CrO4. The results showed that… read more here.
Keywords: recovery; ore processing; process; chromite ore ... See more keywords
Combination Methods of Hematite-Braunite Ore Processing
Sign Up to like & getrecommendations! Published in 2018 at "Journal of Mining Science"
DOI: 10.1134/s1062739118013449
Abstract: The material composition and process properties of hematite–braunite iron–manganese ore from Yuzhny Khingan deposit of Russian Far East are studied. The source of manganese in the ore is mostly braunite. The mineralogy and petrography of… read more here.
Keywords: mineralogy; methods hematite; ore processing; hematite braunite ... See more keywords
Rebellious Tin Ore Processing with New Agents for Nonferrous and Noble Metal Recovery
Sign Up to like & getrecommendations! Published in 2019 at "Journal of Mining Science"
DOI: 10.1134/s1062739119056209
Abstract: The occurrence form of sodium dibutyl dithiocarbamate on chalcopyrite is defined by IR spectroscopy. A stable compound of lead dibutyl dithiocarbamate forms on galenite. Fat acids of tall oil are adsorbed at the surface of… read more here.
Keywords: rebellious tin; tin ore; tin; ore processing ... See more keywords