ferrochrome slag trivalent و hexavalent chromium
(PDF) HEXAVALENT CHROMIUM ANALYSIS OF A FERROCHROME SLAG
2021.5.14 HEXAVALENT CHROMIUM ANALYSIS OF A FERROCHROME SLAG. Conference: XIV International Mineral Processing and Recycling Conference. At: Belgrade, Serbia. Authors: İlker Acar. Ataturk University....
More
Ferrochrome slag: A critical review of its properties,
2023.1.15 Ferrochrome slag (FCS) majorly comprises of 27–33% SiO 2, 15–25% Al 2 O 3, 20–35% MgO and 10–15% iron-chromium compounds (Jena and Panigrahi, 2019;
More
Recovery of trivalent and hexavalent chromium from chromium slag
2022.8.1 1. Introduction. As an important industrial raw material, chromium salt is widely used in the stainless steel industry, electroplating processes, dye production,
More
Hexavalent chromium removal by ferrochromium slag
2005.11.11 Ferrochrome slag (FCS) is a by-product of ferrochrome industries and is produced during the extraction of ferrochrome from chromite ore. The chemical
More
Study of chromium immobilization behavior in unbound and
2022.1.7 Abstract. Disposal of ferrochromium slag, a major industrial solid waste generated during production of ferrochromium alloy has been a serious problem owing to
More
(PDF) Hexavalent chromium removal by ferrochromium slag
2005.12.1 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)
More
Ferrochrome slag: A critical review of its properties,
2022.11.22 Ferrochrome slag (FCS) is a by-product of ferrochrome industries and is produced during the extraction of ferrochrome from chromite ore. The chemical
More
Chromium Stabilization in Ferrochromium Slag for its
2022.6.3 Metallic chromium Cr(0) is produced by human interventions while trivalent chromium Cr(III) and hexavalent chromium Cr(VI) are naturally found near the earth’s
More
Efficient adsorption of hexavalent chromium ions onto
2022.11.16 experimental data of various process parameters to successfully predict the adsorption behavior of chromium (IV) ions onto the FeCr-PANI adsorbent. The ANN
More
Hexavalent chromium removal by ferrochromium slag
Journal of Hazardous Materials B126 (2005) 176–182 Hexavalent chromium removal by ferrochromium slag Mehmet Erdema, H. Soner Altundogan˘ b, M. Deniz Turanb, Fikret
More
In situ bioremediation of hexavalent chromium in presence
2019.5.15 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)].
More
Investigation of Ferrochromium Wastes for their Hazardous Hexavalent ...
2021.8.16 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 ...
More
(PDF) Hexavalent chromium removal by ferrochromium slag
2005.12.1 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 ...
More
Characteristics of ferrochrome slag aggregate and its uses as
2021.8.2 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.
MoreIn situ bioremediation of hexavalent chromium in presence
2019.5.15 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)].
More
Hexavalent chromium removal by ferrochromium slag
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 ...
More
Speciation Of Chromium In Soils, Plants And Waste
2013.12.21 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 ...
MoreIn situ bioremediation of hexavalent chromium in presence
2019.5.15 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)].
More
Release behaviour of chromium from ferrochrome slag
2012.3.28 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 ...
More
Hexavalent chromium in the recovery of ferrochromium from slag
1997.10.1 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
More
Efficient adsorption of hexavalent chromium ions
2022.7.7 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.
More
(PDF) Use of Ferrochrome Slags in the South
2022.1.26 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 ...
More
Efficient adsorption of hexavalent chromium ions onto
2022.11.16 experimental data of various process parameters to successfully predict the adsorption behavior of chromium (IV) ions onto the FeCr-PANI adsorbent. The ANN model was trained using the Lavenberg-Marquardt algorithm and ten neurons in the hidden layer and was able to estimate the % removal eciency of chromium (IV) under the
More
Study of chromium immobilization behavior in unbound and
2022.1.7 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.
MoreHexavalent chromium removal by ferrochromium slag
Journal of Hazardous Materials B126 (2005) 176–182 Hexavalent chromium removal by ferrochromium slag Mehmet Erdem a , H. Soner Altundoğan b , M. Deniz Turan b , Fikret Tümen b,∗ a Department of Environmental Engineering, Fırat University, 23279 Elazığ, Turkey b Department of Chemical Engineering, Fırat University, 23279 Elazığ, Turkey
More
Valuable utilization of ferrochrome slag for wastewater
2021.11.9 tal results showed that 99% removal of chromium (Cr(VI)) was achieved in 1 h by ferrochrome slag from Sukinda chromite mines water. There is an in situ generation of ferrous sulphate by the effect of oxidiz-ing agent and iron content of ferrochrome slag which is capable of reducing Cr(VI) to trivalent chromium.
More
An Insight into Microbial Remediation of Hexavalent Chromium
2020.6.30 Hexavalent chromium is mutagenic and carcinogenic and causes various health implications. Thus, the removal of Cr 6+ from the contaminated environmental matrix especially water is of fundamental importance for environmental technologists and policy makers alike. Various remediation technologies are proposed by the researchers and
More
The preparation and formation mechanism of ferrochrome slag
The presence of hexavalent chromium Cr (Ⅵ) poses certain risks to the environment and human health, and its water solubility is significantly higher than that of trivalent chromium Cr (Ⅲ) [15]. Therefore, the leaching behavior of chromium must be explored during the utilization of FCS, particularly considering that Cr (Ⅲ) may transform to ...
More
Removal of hexavalent chromium from wastewater by Cu/Fe
2021.5.25 Hexavalent chromium wastewater was prepared by the extraction of soil sampled from a decommissioned chemical plant in Hangzhou, China (120° 18′ E, 30° 22′ N).
More
Release behaviour of chromium from ferrochrome slag
2012.1.1 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
More
Potential Toxic Effects of Chromium, Chromite Mining
2019.10.11 Executive Summary. Chromium (Cr) is an element that can exist in six valence states, 0, II, III, IV, V and VI, which represent the number of bonds an atom is capable of making. Trivalent (Cr-III) and hexavalent (Cr-VI) are the most common chromium species found environmentally. Trivalent is the most stable form and its compounds are
More
Recovery of Chromium from Ferrochrome Slag - rroij
2024.3.1 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 ...
More
Ferrochrome - an overview ScienceDirect Topics
Ferrochrome –silicon is another chromium ferroalloy directly produced from chromite ores by carbothermic reduction in submerged arc furnace. The chromium content ranges from 34 to 42%, that of silicon from 38 to 45%, and that of carbon from 0.05 to 0.06%. The mix order is similar to that of smelting high-carbon ferrochromium except that it ...
Moreferrochrome slag trivalent and hexavalent chromium
Hexavalent chromium removal by ferrochromium slag Nov 11, 2005 Hexavalent chromium removal by ferrochromium slag Erdem M(1), Altundoğan HS, Turan MD, Tümen F . Toggle navigation. Home; About Us; Products; Cases; ... ferrochrome slag trivalent and hexavalent chromium 2020-03-20T17:03:14+00:00 Who we are > Products > Cases > Solutions >
MoreAssessment of factors influencing the elution of chromium
2020.4.1 The microstructure of the ferrochrome slag powder is illustrated in Figure 1, while the main chemical composition is presented in Table 1. ... Specifically, for 2p3/2 orbitals, trivalent and ...
More
Hexavalent chromium reducing bacteria: mechanism of reduction
2021.3.10 As a common heavy metal, chromium and its compounds are widely used in industrial applications, e.g., leather tanning, electroplating, and in stainless steel, paints and fertilizers. Due to the strong toxicity of Cr(VI), chromium is regarded as a major source of pollution with a serious impact on the environment and biological systems. The
More
Research on Trivalent Chromium Removal from Wastewater
2011.7.1 You, H. L. Yang, H. F. Xie, " Pretreatment of chromium-containing wastewater with steel slag and solidification of waste steel slag and chromium residue, " Techniques and Equipment for ...
More
Assessment of factors influencing the elution of chromium
2021.1.1 Chromium speciation in the slag was observed to exist as mostly immobile trivalent state. But there may be possibility of its conversion to leachable hexavalent chromium and its subsequent release from slag matrix causing chromium pollution problems. Elution of chromium from slag was studied under adverse environmental
More
An Overview of Currently Applied Ferrochrome
2023.6.13 Abstract: Ferrochrome (FeCr) is the main source of virgin chromium (Cr) units used in modern-day chromium (Cr) containing alloys. The vast majority of produced Cr is used during the production of stainless steel, which owes its corrosion resistance mainly to the presence of Cr. In turn, stainless
More