Environmental characterization of Sarcheshmeh Cu-smelting slag, Kerman, Iran: Application of geochemistry, mineralogy and single extraction methods

Khorasanipour, Mehdi; Esmaeilzadeh, Esmat

doi:10.1016/j.gexplo.2016.03.015

“…Additionally, sulfides (galena, sphalerite, arsenopyrite, and chalcopyrite) are consistently observed in minor quantities within the selected slag tailing, aligning with findings from other furnace studies [15,32]. Despite sulfides being volumetrically minor phases in slag tailing, these minerals should be taken fully into consideration for potential environmental risks [40]. Upon comparing the mineralogical distribution among different size fractions, the peaks of fayalite and hematite show an increasing trend with decreasing size fractions, indicating a preference for these secondary phases to exist in finer particles.…”

Section: Physico-chemical Property Of Copper Slag Tailingsupporting

confidence: 84%

Speciation Characterization and Environmental Stability of Arsenic in Arsenic-Containing Copper Slag Tailing

You,

Hu,

Zhou

et al. 2024

Molecules

1

0

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The increasing presence of arsenic-containing impurities within Cu ores can adversely affect the smelting process and aggravate the environmental impact of slag tailing. This study investigates the geochemical, mineralogical, and chemical speciation characteristics to better understand the association and environmental stability of metal(loid)s in copper slag tailing. The results indicate that the predominant chemical compositions of the selected slag tailing are Fe2O3 (54.8%) and SiO2 (28.1%). These tailings exhibit potential for multi-elemental contamination due to elevated concentrations of environmentally sensitive elements. Mineral phases identified within the slag tailings include silicate (fayalite), oxides (magnetite and hematite), and sulfides (galena, sphalerite, arsenopyrite, and chalcopyrite). The consistent presence of silicate, iron, arsenic, and oxygen in the elemental distribution suggests the existence of arsenic within silicate minerals in the form of Si-Fe-As-O phases. Additionally, arsenic shows association with sulfide minerals and oxides. The percentages of arsenite (As(III)) and arsenate (As(V)) within the selected slag tailings are 59.4% and 40.6%, respectively. While the slag tailings are deemed non-hazardous due to the minimal amounts of toxic elements in leachates, proper disposal measures should be taken due to the elevated carbonate-bound levels of As and Cu present in these tailings.

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“…Additionally, sul des (galena, sphalerite, arsenopyrite, and chalcopyrite) are consistently observed in minor quantities within the selected slag tailing, aligning with ndings from other furnace studies (Kierczak et al, 2013;Mateus et al, 2011). Despite sul des are volumetrically minor phases in slag tailing, these minerals should be taken fully consideration for the potential environmental risks (Khorasanipour and Esmaeilzadeh, 2016). Upon comparing mineralogical distribution among different size fractions, the peaks of fayalite and hematite show an increasing trend with decreasing size fractions, indicating a preference for these secondary phases to exist in ner particles.…”

Section: Physico-chemical Property Of Copper Slag Tailingsupporting

confidence: 81%

Speciation characterization and environmental stability of arsenic in arsenic-containing copper slag tailing

You,

Hu,

Zhou

2024

Preprint

0

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The increasing presence of arsenic-containing impurities within Cu ores can adversely affect the smelting process and aggravate the environmental impact of slag tailing. This study investigates the geochemical, mineralogical, and chemical speciation characteristics to better understand the association and environmental stability of metal(loid)s in copper slag tailing. The results indicate that the predominant chemical compositions of the selected slag tailing are Fe2O3 (54.8%) and SiO2 (28.1%). These tailings exhibit potential for multi-elemental contamination due to elevated concentrations of environmentally sensitive elements. Mineral phases identified within the slag tailings include silicate (fayalite), oxides (magnetite and hematite), and sulfides (galena, sphalerite, arsenopyrite, and chalcopyrite). The consistent presence of silicate, iron, arsenic, and oxygen in the elemental distribution suggests the existence of arsenic within silicate minerals in the form of Si-Fe-As-O phases. Additionally, arsenic shows association with sulfide minerals and oxides. The percentages of arsenite (As(III)) and arsenate (As(V)) within the selected slag tailings are 59.4% and 40.6%, respectively. While the slag tailings are deemed non-hazardous due to the minimal amounts of toxic elements in leachates, proper disposal measures should be taken due to the elevated carbonate-bound levels of As and Cu present in these tailings.

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“…Non‐ferrous metallurgical slags (NFMS) predominantly result from the processing of copper, nickel, lead, and zinc 17 . Among these, NFMS from copper production typically contains high content of FeO and SiO 2 and a rather low content of Ca and often contains heavy metals, thereby presenting a leaching risk if not properly treated 17,18 . In some countries, NFMS is therefore still landfilled or finds applications with relatively low added value 19 .…”

Section: Introductionmentioning

confidence: 99%

“…17 Among these, NFMS from copper production typically contains high content of FeO and SiO 2 and a rather low content of Ca and often contains heavy metals, thereby presenting a leaching risk if not properly treated. 17,18 In some countries, NFMS is therefore still landfilled or finds applications with relatively low added value. 19 This is fortunately not the case for NFMS in general.…”

Section: Introductionmentioning

confidence: 99%

Impact of Ca, Al, and Mg on reaction kinetics, pore structure, and performance of Fe‐rich alkali‐activated slag

Wen,

Peys,

Hertel

et al. 2024

J Am Ceram Soc.

5

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Alkali‐activated materials can be formed by alkali‐activation of Fe‐rich non‐ferrous metallurgical slags (AA‐NFMS). To study NFMS in AA‐NFMS systematically, five NFMS were synthesized, with different CaO (6–16 wt%), Al2O3 (7–11 wt%), and MgO (0–4 wt%) contents, while keeping the same FeOx/SiO2 molar ratio. The effect of slag chemistry and the alkali ions (Na+/K+ = 0, 0.5, and 1) in alkali‐activating solution on the reaction kinetics, compressive strength (3, 7, and 28 days), and pore structure of AA‐NFMS was investigated. The reactivity up to 3 days was evaluated via isothermal calorimetry, and the pore structure was analyzed via mercury intrusion porosimetry. Higher Al/Si in the slag showed higher reactivity, higher compressive strength, and lower total porosity of the AA‐NFMS. Higher Ca/Si yielded lower cumulative heat after 3 days and decreased early compressive strength but higher strength after 28 days of curing. Ca replacement by Mg led to faster reaction kinetics but inferior mechanical properties and increased porosity. Increased K+ concentration in the activator resulted in higher reactivity and compressive strength despite the higher total porosity. Empirical model fitting using JMP software revealed that K+/(N++ K+) in the activator, Ca/Si, and (Ca+Mg)/Si in NFMS are significant factors that affect the strength of AA‐NFMS.

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Environmental characterization of Sarcheshmeh Cu-smelting slag, Kerman, Iran: Application of geochemistry, mineralogy and single extraction methods

Cited by 21 publications

References 64 publications

Speciation Characterization and Environmental Stability of Arsenic in Arsenic-Containing Copper Slag Tailing

Speciation Characterization and Environmental Stability of Arsenic in Arsenic-Containing Copper Slag Tailing

Speciation characterization and environmental stability of arsenic in arsenic-containing copper slag tailing

Impact of Ca, Al, and Mg on reaction kinetics, pore structure, and performance of Fe‐rich alkali‐activated slag

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