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2021year5month14day In this study, a slag sample resulted from a ferrochrome production process was analyzed for its hexavalent chromium content. Within this scope, in addition
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2022year8month1day Chromium slag (CS) with large quantities of multivalent Cr species (III and VI) generated during chromium salt production is hazardous to nature and living
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2022year6month3day Ferrochromium slag is a by-product of ferrochromium production via the smelting of chromite ores. The mechanical properties of this slag make it a potential
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2022year7month7day The present investigation is concerned with the use of a nanocomposite adsorbent synthesized by polyaniline modification of ferrochromium slag (FeCr-PANI) for
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2021year1month1day 1. Introduction In ferrochromium production process, an important solid waste slag is generated and faces the disposal problem owing to the existence of
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2005year12month1day Thus, it has been demonstrated that the treatment of jigging water stream to be generated in a ferrochrome plant containing Cr (VI) can be accomplished by using
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2022year11month16day The current research is concerned with the adsorption behavior of chromium (IV) ions in an aqueous solution using a novel ferrochrome slag/polyaniline
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2016year6month8day Recycling and efficient utilization of the large volumes of slag generated by ferrochrome production process is a huge challenge for ferrochrome producers. This
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2022year11month22day Ferrochrome slag (FCS) is a by-product of ferrochrome industries and is produced during the extraction of ferrochrome from chromite ore. The chemical
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2019year5month15day Stability of chromium in the ferrochrome slag dumps and leachate are affected by pH, redox potential and the presence of other metallic species in the slag. It is desirable to keep chromium in slag dumps in the trivalent [Cr(III)] state because trivalent chromium is 1000 times less toxic to living organisms than the hexavalent form [Cr(VI)].
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Journal of Hazardous Materials B126 (2005) 176–182 Hexavalent chromium removal by ferrochromium slag Mehmet Erdema, H. Soner Altundogan˘ b, M. Deniz Turanb, Fikret Tumen¨ b,∗ a Department of ...
Read More2023year8month29day Specifically, for 2p3/2 orbitals, trivalent and hexavalent chromium were assigned at 577.1 and 579.2 eV, ... The ferrochrome slag (FS) and electric-arc furnace dust (EAFD) samples used were ...
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2018year7month6day The waste materials produced by ferrochrome industry are slag, dust and processed water. These wastes have high chromium concentration that can cause pollution to the environment. ... Ren J, Wu G, Zhang Y, Chen Y, Li X (2015) A Bacillus subtilis strain can reduce hexavalent chromium to trivalent and an nfrA gene is involved. Int Biodeterior ...
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2012year3month28day Huge amount of ferrochrome slag, a solid waste is being generated from submerged electric arc furnace during manufacturing of ferrochrome alloy. The waste slag contains about 6-12% chromium as ...
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2005year12month1day The aim of this study is to demonstrate the potential of Cr (VI) generation during jigging operation applied for ferrochrome recovery from slag. The Cr (VI) concentrations of water contacted with ...
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1997year10month1day The aim of this study is to demonstrate the potential of Cr(VI) generation during jigging operation applied for ferrochrome recovery from slag. The Cr(VI) concentrations of water contacted with ferrochromium slag (W/FS = 10) in a closed cycle after 50 batches were found as 0.61 mg/l. Also, reduction of Cr(VI) to Cr(III) and a
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In drinking water distribution systems, the oxidation of zerovalent chromium, Cr(0), in iron corrosion scales by chlorine residual disinfectant is the dominant reaction to form carcinogenic hexavalent chromium, Cr(VI). This study investigates inhibitive corrosion control strategies through adjustments of chemical water parameters (i.e., pH, silicate,
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2021year8month2day Ferrochrome slag (FCS) is a by-product discharged in the smelting of ferrochrome alloys. This high-volume waste can be effectively valorized by utilizing it as aggregate in ultra-high performance concrete (UHPC), which is beneficial for resolving the environmental issue induced via its buildup and potential risk of chromium leaching.
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The current research is concerned with the adsorption behavior of chromium (IV) ions in an aqueous solution using a novel ferrochrome slag/polyaniline nanocomposite (FeCr-PANI) adsorbent. The effect of process parameters such as temperature, pH solution, initial Cr (VI) ions concentration, adsorbent dosage, and contact time on the adsorption ...
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2022year1month7day The best result is obtained from concrete with slag-based Portland cement because of reduction of leachable hexavalent chromium to insoluble trivalent chromium and its subsequent immobilization. Linear graphs are obtained with R 2 values greater than 0.97. The resultant values of slope close to 0.5 confirm the mechanism of release as diffusion.
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2019year1month1day Abstract Chromium (III) is one of the chemicals widely used in various industrial processes. The wastewater containing Chromium (III) can be interconverted to Cr (VI) in the environment, which is one of the most toxic chemicals to biological systems. This paper investigates the removal of chromium (III) from aqueous solutions by adsorption
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2005year11month11day The aim of this study is to demonstrate the potential of Cr(VI) generation during jigging operation applied for ferrochrome recovery from slag. The Cr(VI) concentrations of water contacted with ferrochromium slag (W/FS=10) in a closed cycle after 50 batches were found as 0.61 mg/l. ... Hexavalent chromium removal by ferrochromium
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2023year11month28day Ferrochrome is a ferroalloy in the metallurgy, playing a key role in the production of stainless steel. This alloy, consisting primarily of iron and chromium (50-705), is renowned for its corrosion resistance and durability, making it an indispensable component in various industrial applications.
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2013year12month21day Leaching of Cr (VI) from the ferrochrome slag causes sustainable contamination to the environment (Shah,1984). Lind et al., (2001) and Pillay et al., (2003) indicated that there is gradual oxidation of trivalent to hexavalent chromium when the slag is exposed to atmospheric oxygen. This releases the more mobile and toxic Cr (VI) into the ...
Read More2019year5month15day Stability of chromium in the ferrochrome slag dumps and leachate are affected by pH, redox potential and the presence of other metallic species in the slag. It is desirable to keep chromium in slag dumps in the trivalent [Cr(III)] state because trivalent chromium is 1000 times less toxic to living organisms than the hexavalent form [Cr(VI)].
Read More2012year1month1day Huge amount of ferrochrome slag, a solid waste is being generated from submerged electric arc furnace during manufacturing of ferrochrome alloy. The waste slag contains about 6–12% chromium as chromium oxide and it has the potentiality of releasing hazardous chromium compounds. Although chromium exists in the slag as highly
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Read More2019year5month15day Stability of chromium in the ferrochrome slag dumps and leachate are affected by pH, redox potential and the presence of other metallic species in the slag. It is desirable to keep chromium in slag dumps in the trivalent [Cr(III)] state because trivalent chromium is 1000 times less toxic to living organisms than the hexavalent form [Cr(VI)].
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2013year12month1day Chromium is one of the most common toxic heavy metal found in the environment. It exists in the common oxidation states of hexavalent chromium Cr(VI) and trivalent chromium Cr(III). While chromium as Cr(III) is less mobile and less harmful, Cr(VI) is highly leachable and extremely toxic under all environmental conditions.
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