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ferrochrome slag trivalent و hexavalent chromium

(PDF) HEXAVALENT CHROMIUM ANALYSIS OF A FERROCHROME SLAG

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 to the main material...

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Ferrochrome slag: A critical review of its properties,

2023year1month15day  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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A critical review of the material characteristics, utilizations ...

2024year5month3day  Therefore, the advantages of using ferrochrome slag as the main raw material for the preparation of lightweight ceramic aggregate include: (1) silicon,

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Recovery of trivalent and hexavalent chromium from chromium slag

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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Hexavalent chromium removal by ferrochromium slag

The fer-rochromium slags consist mainly of SiO2, Al2O3 and MgO in different phases such as spinel, MgOAl2O3, and forsterite, MgO SiO2, but also smaller amounts of CaO,

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Efficient adsorption of hexavalent chromium ions onto

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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Chromium Stabilization in Ferrochromium Slag for its

2022year6month3day  This study investigates the effect of heat treatment and composition change on spinel formation in ferrochromium slag and subsequently on the stabilization of

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Efficient adsorption of hexavalent chromium ions onto novel ferrochrome ...

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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(PDF) Hexavalent chromium removal by ferrochromium slag

2005year12month1day  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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Reductive transformation of hexavalent chromium by ferrous

2021year1month15day  The transformation between hexavalent chromium (Cr 6+) and trivalent chromium (Cr 3+) has a significant impact on ecosystems, as Cr 6+ has higher levels of

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Chromium Stabilization in Ferrochromium Slag for its

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 material to be used as an inexpensive construction material, the utilization of which can reduce the use of natural resources. Despite its potential use, ferrochromium slag is treated as a

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Efficient adsorption of hexavalent chromium ions onto

2022year11month16day  Ecient adsorption of hexavalent chromium ions onto novel ferrochrome slag/polyaniline nanocomposite: ANN modeling, isotherms, kinetics, and thermodynamic studies ... the trivalent chro-mium (Cr 3+) and the hexavalent chromium (Cr6+), also writ-ten as Cr (III) and Cr (VI). The main focus of concern is the Cr (VI) since it is more toxic ...

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(PDF) Hexavalent chromium removal by ferrochromium slag

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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Hexavalent chromium removal by ferrochromium slag

2005year11month11day  1.. IntroductionFerrochromium is a master alloy of iron and chromium, containing 45–80% Cr and various amounts of Fe, C and other elements. Ferrochromium is produced pyrometallurgically by carbothermic reduction of chromite ore (FeOCr 2 O 3).The main slag additives used are quartzite and aluminium oxide containing materials to

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Efficient adsorption of hexavalent chromium ions onto novel ferrochrome ...

2022year7month7day  Therefore, according to the particle size distribution curve of GB/T 14684-2011 grading zone-II, the fine ferrochrome slag was optimized to belong to the zone-Ⅱ.

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Environmental and technical assessment of ferrochrome slag

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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Investigation of Ferrochromium Wastes for their Hazardous Hexavalent ...

2021year8month16day  Specifically, for 2p3/2 orbitals, trivalent and hexavalent chromium were assigned at 577.1 and 579.2 eV, respectively whereas 586.9 and 588.9 eV for 2p1/2 orbitals. ... However, Ferrochrome slag ...

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Recovery of Chromium from Ferrochrome Slag - 1Library

Karale etal (2007) conducted experiments Removal and recovery of hexavalent chromium from industrial waste water by precipitation.. ... Recovery of chromium from ferrochrome slag is 64% by treatment of slag with lime at 973K in solid phase. ... B.K. Sharma., Colorimetric method for the estimation of trivalent chromium, 1959, Volume 47, Issue 5 ...

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Recovery of Chromium from Ferrochrome Slag - rroij

2024year4month27day  R.S. Karale etal (2007) conducted experiments Removal and recovery of hexavalent chromium from industrial waste water by precipitation. ... Recovery of chromium from ferrochrome slag is 64% by treatment of slag with lime at 973K in solid phase. ... V.M. Bhuchar., K.C. Agarwal., B.K. Sharma., Colorimetric method for the estimation of trivalent ...

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Release behaviour of chromium from ferrochrome slag

2012year9month26day  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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Study of chromium immobilization behavior in unbound and

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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Hexavalent chromium in the recovery of ferrochromium from slag

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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Investigation of Ferrochromium Wastes for their

2023year8month29day  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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Hexavalent chromium removal by ferrochromium slag

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Recovery of Chromium from Ferrochrome Slag - IJIRSET

2020year11month30day  R.S. Karale etal (2007) conducted experiments Removal and recovery of hexavalent chromium from industrial waste water by precipitation. ... Recovery of chromium from ferrochrome slag is 64% by treatment of slag with lime at 973K in solid phase. ... V.M. Bhuchar., K.C. Agarwal., B.K. Sharma., Colorimetric method for the estimation of trivalent ...

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In situ bioremediation of hexavalent chromium in presence

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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(PDF) Use of Ferrochrome Slags in the South African Context

2022year1month26day  The ferrochrome industry in. South Africa is the largest in the world. The slag to metal ratio of the ferrochrome process is. averaged to 1.5, therefore, for every ton of ferrochrome produced, 1.5 ...

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In Situ Bioremediation of Chromium (VI) In a Simulated

2022year4month8day  for Cr(IV) reduction to the trivalent state, or as a stabiliser of Cr in the trivalent state, Cr(III). A Cr(VI) reducing culture isolated from Cr(VI) contaminated sludge was used as the biocatalyst to achieve the stabilisation of chromium as Cr(III) in a ferrochrome slag. 2. Material and method 2.1 Chemicals

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Sustainable solidification of ferrochrome slag through ...

2019year8month1day  Ferrochrome (FeCr) slag was used as a precursor for the synthesis of a geopolymer. The effect of KOH concentration, liquid solid ratio (L/S), content of potassium metalisicate (KS) or potassium aluminate (KA), curing time on the unconfined compressive strength (UCS) and metal leachability of the synthesised geopolymer was investigated. A

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Valuable Recovery Technology and Resource Utilization of Chromium ...

2023year10month18day  As a type of metallurgical solid waste with a significant output, chromium-containing metallurgical dust and slag are gaining increasing attention. They mainly include stainless steel dust, stainless steel slag, ferrochrome dust, and ferrochrome slag, which contain significant amounts of valuable elements, such as chromium, iron, and zinc, as

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