This review presents the effect of chromium pollution caused by chromite-mining and ferrochrome industries to the environment, its possible toxic effects on human as well as …
IMPACT OF CHROMITE MINING ON ENVIRONMENT IN SUK INDA AREA OF ODISHA, ... which plays a colossal role to strengthen the economy of our country and leads to sustainable development. The consequences ...
Chromium in Environment, Its Toxic Effect From Chromite-Mining and Ferrochrome Industries, and Its Possible Bioremediation by Johan J. Coetzee, Neetu
Chromium (III) or trivalent chromium occurs naturally in the environment (e.g. in chromite) and is an essential dietary nutrient. Metallic chromium (0) and chromium (VI) or hexavalent chromium are produced by industrial processes.
The chrome ore beneficiation processes include gravity separation, flotation, magnetoelectric separation and chemical beneficiation, etc. Because of the chrome ore composition that composed of one or more silicate, and the density difference between the chrome and silicate, the research both in home and aboard about chrome beneficiation …
Consequently, in this study, a Nigerian chromite was treated by hydrochloric acid (HCl) solution. The influence of leaching duration, acid concentration, reaction temperature, and particle size on the extent of impurities dissolution was determined.
CHROMITE ORE MANUFACTURING PROCESS Chromite ore processing residual (COPR) is a waste stream generated during the industrial production of chromate in the presence of excess lime (CaO) and soda ash (Na2CO3).
Physical Chemistry of Roasting and Leaching Reactions for Chromium Chemical Manufacturing and Its Impact on Environment - A Review
Chromium is used in many industrial applications, but it poses a threat to local environment. The effluents and solid wastes from the mining, chrome-plating, leather-tanning, and dye-manufacturing industries are high in chromium concentration and identified as a major health hazard because of pollution to the environment.
The inorganic material that are derived from earth's crust used to support our civilisation. Chromium is one of such very important metal, although it is very rarely used in its metal form, is an essential ingredient for stainless steel making. tool, and alloy steel, nickel–chromium heating elements, and plating metals. However, the chromite mineral …
Very few field studies have been conducted about the effects of environmental chromium pollution on wildlife and we did not find any information directly relevant to potential impacts of chromite mining and ferrochrome production on terrestrial wildlife.
Experimental and modeling studies were conducted to delineate the reaction progress of chromite ore processing residue (COPR) upon hydration and the roles of brownmillerite and calcium aluminum chromium oxide hydrates (CAC) in the scavenging of hexavalent chromium. A kinetic study was conducted by preparing slurry samples with …
Here we review chromite mining in India, impact of chromite pollution on plants and the environment, and phytoremediation of Cr-polluted soils. Keywords Chromium · Environment · Heavy metal · Mining · Rhizosphere · Hyperaccumulator Introduction The economic stability and advancement of a country are highly dependent on its rich mineral ...
The issue that the residual Cr(VI) in the reduced chromite ore processing residue (rCOPR) is slowly released during deposition has attracted increasing attention. However, the speciation and leaching behaviors of Cr(VI) in rCOPR are still not clear, which is essential for revealing the release mecha …
As species we humans generate excessive amounts of waste and hence for sustainability we should explore innovative ways to recover them. The primary objective of this study is to demonstrate an efficient and optimum way to recover chromium and iron from chromite ore processing residues (COPR) for the production of chrome steel and …
In addition to exploring the economic, environmental, and health impacts of nations associated with metal supply chains, our analysis makes it possible to quantify the relative contributions that the disruption of the mining of different metals made to the benefits that countries received.
A comprehensive health and environmental impact assessment prior to the initiation of any chromite mining and processing can review discharges to the environment and potential pathways of exposure for workers and members of the public.
Currently, the only domestic commercial chromium supply source is from recycling, although the United States does have small chromite resources, primarily in Oregon. The Stillwater complex of Montana also hosts chromite resources associated with platinum and …
Having recognized this, it is our duty to make a life-long resolution to positively impact our environment". Conclusion It is obvious that mankind is progressing towards development by utilizing better mining technologies for ore exploitation but simultaneously destroying its very own environment and making it less sustainable for living in ...
Chromium comes in a plethora of forms and shapes in nature; it is a naturally occurring element (Atomic Mass #24), and can be both helpful and harmful to human health and …
The authors would like to thank Mr. Utsav Kashyap (Environmental Manager of TISCO, Sukinda Chromite Mine) for facilitating the collection of water samples during this study.
Here we review chromite mining in India, impact of chromite pollution on plants and the environment, and phytoremediation of Cr-polluted soils.
The natural resource of chromium is the chromite ore, which is a spinel (Fe 2+, Mg) [Cr,Al,Fe 3+] 2 O 4, and is often present with gangue minerals such silicates. Traditionally chromium chemical extraction has been carried out with alkali and CaO roasting, which led to major environmental issues due to CaCrO 4 /Na 2 CrO 4 release.
Chromium pollution is a significant environmental threat, severely impacting our environment and natural resources, especially water and soil.
Sukinda Valley of Jajpur district, Odisha contributes about 98% of India's total chromite reserves with about 334 million tons annual production rate globally, which plays a colossal role to strengthen the economy of our country and leads to sustainable development. The consequences related to chromite mining and excessive production …
Chromite ore processing residue (COPR) is a waste byproduct of chromate production that contains high levels of hexavalent chromium (Cr [VI]). Although the high temperature chromite process was banned in several countries, its legacy still exists at numerous contaminated sites.
Mishra and Sahu (2013) reported that the environmental impacts of chromite mining in Sukinda Valley are caused by the presence of hexavalent Cr in mine drainage water, dust generation, overburden generation, and loss of biodiversity and forest.
Chromium comes in a plethora of forms and shapes in nature; it is a naturally occurring element (Atomic Mass #24), and can be both helpful and harmful to human health and the environment.
Environment & survival are complementary. We have to raise public awareness & provide support for changes that are needed to be ushered into our life styles & attitudes, if we are to preserve our earth, our environment & our family. Keeping in view this objective, a detailed study involving workers community of Kaliapani Chromite Mines was ...
Identification of Cr (VI) speciation in ferrous sulfate-reduced chromite ore processing residue (rCOPR) and impacts of environmental factors erosion on Cr (VI) leaching
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Immediate solutions are needed to protect the health of biotic species of this region and their surroundings. Here we review chromite mining in India, impact of chromite pollution …
Developing chromite mining and/or processing, as well as building infrastructure in this sensitive ecosystem will require careful planning to mitigate environmental impacts. …
Chromite ore processing tailings and low-grade manganese ores are typically considered waste due to their limited or negligible utility, leading to environmental and storage concerns. Researchers globally have explored various methods to utilize or upgrade these wastes, particularly because dumping chromite ore has been linked to …
Humans impact the physical environment in many ways: overpopulation, pollution, burning fossil fuels, and deforestation. Changes like these have triggered climate change, soil erosion, poor air quality, and undrinkable water. These negative impacts can affect human behavior and can prompt mass migrations or battles over clean water. Help your …
Developing chromite mining and/or processing, as well as building infrastructure in this sensitive ecosystem will require careful planning to mitigate environmental impacts. The Ring of Fire is also located within the traditional territories of several First Nations (Chong, 2014).
