Characterization and pH-dependent environmental stability of arsenic trioxide-containing copper smelter flue dust

Jarošíková, Alice; Ettler, Vojtěch; Mihaljevič, Martin; Drahota, Petr; Culka, Adam; Ráček, Martin

doi:10.1016/j.jenvman.2017.12.044

Cited by 53 publications

(22 citation statements)

References 37 publications

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“…Arsenite or subarsenite is formed by the collision and adsorption of arsenic with lead, antimony, zinc, and other elements in high-temperature gas. The content of arsenic has a wide range from 10 to 40% (Jarošíková et al, 2018). Besides arsenic, high arsenic dust also contains a large amount of valuable metals, such as copper, lead, zinc, tin, and indium, which have high economic value (Asanov et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Study on Extraction Separation of Thioarsenite Acid in Alkaline Solution by CO32--Type Tri-n-Octylmethyl-Ammonium Chloride

et al. 2021

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To overcome the problem of arsenic separation and enrichment from an alkaline leaching solution in arsenic-containing dust, a CO32--type tri-n-octylmethyl-ammonium chloride (TOMAC) method for extracting thioarsenite is proposed in this paper. Considering an alkaline leaching solution as the research object, after vulcanization pretreatment, TOMAC transformation and organic phase saturated extraction capacity were measured, and the extraction mechanism was preliminarily studied. First, Cl−-type quaternary ammonium salt was effectively transformed to HCO3--type by treating organic phase with saturated NaHCO3five times. TOMAC was effectively transformed from HCO3- to CO32- type by alkaline washing with 1.0 mol/l NaOH solution; this washing was repeated thrice. Thereafter, the effects of organic phase composition, phase ratio, extraction time, and temperature on the extraction and separation of arsenic were investigated. The results show that under the conditions of 30% CO32--type TOMAC + 15% sec-octanol + 55% sulfonated kerosene, VO/VA = 1/1, and 5 min extraction at room temperature, the single-stage extraction rate of AsIII is 85.2%. The AsIII concentration in raffinate can be reduced to less than 1.33 × 10−3 mol/l by four-stage countercurrent extraction, and the extraction rate of AsIII can exceed 98.4%.

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Section: Introductionmentioning

confidence: 99%

Study on Extraction Separation of Thioarsenite Acid in Alkaline Solution by CO32--Type Tri-n-Octylmethyl-Ammonium Chloride

et al. 2021

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“…[5][6][7][8][9] Naturally, arsenic coexists with copper and zinc, and it can be enriched in the dust during the production of copper via pyrometallurgical process. [10][11][12][13][14][15][16] The dust is usually leached by H 2 SO 4 , [17][18][19][20] generating a large amount of As, Cu, and Zn rich leaching liquor. As, Cu and Zn have decent economic values and are widely used in various elds.…”

Section: Introductionmentioning

confidence: 99%

Separation and recovery of arsenic from As, Cu, and Zn rich leaching liquor using a reduction-crystallization approach

et al. 2021

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“…At present, about 85% of the world’s copper is extracted from copper sulfide concentrates by pyrometallurgical processes. Large tonnages of arsenic-containing smelting ashes are produced in the processes (Jarosikova et al, 2018; Nazari et al, 2017), which contain immense valuable metals, such as copper, zinc, lead, bismuth, tin, indium, silver, and antimony. Hence, recovery of the valuable metals from the arsenic-containing copper smelting ashes is very attractive.…”

Section: Introductionmentioning

confidence: 99%

“…It is also very difficult to avoid the generation of AsH 3 when extraction of copper by reduction, either chemically or electrolytically. Meanwhile, arsenic may be treated as calcium arsenate (Lei et al, 2018) or ferric arsenate (Gomez et al, 2011; Halder et al, 2018; Jarosikova et al, 2018; Klerk et al, 2012; Majzlan et al, 2012; Paktunc and Bruggeman, 2010) which brings secondary environmental pollution. Therefore, pre-separation of arsenic from arsenic-containing copper smelting ashes by alkali leaching for centralized treatment has attracted much attention from scientists.…”

Section: Introductionmentioning

confidence: 99%

An effective separation process of arsenic, lead, and zinc from high arsenic-containing copper smelting ashes by alkali leaching followed by sulfide precipitation

Zhang¹,

Feng²,

Jin

2020

Waste Manag Res

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Separation of arsenic and valuable metals (Pb, Zn, Cu, Bi, Sn, In, Ag, Sb, etc.) is a core problem for effective utilization of high arsenic-containing copper smelting ashes (HACSA). This study developed an effective separation process of arsenic, lead, and zinc from HACSA via alkali leaching followed by sulfide precipitation. The separation behaviors and optimum conditions for alkali leaching of arsenic and sulfide precipitation of lead and zinc were established respectively as follows: NaOH concentration 3.81 M; temperature 80°C; time 90 minutes; liquid-to-solid ratio 4:1; agitation speed 450 revolutions/minute (r/min) and 2.0 times of theoretical quantity of sodium sulfide (Na2S); temperature 70°C; and time 60 minutes. The results indicated that the leaching rates of As, Pb, and Zn were 92.4%, 36.9% and 13.4%, respectively. More than 99% of lead and zinc were precipitated from the alkali leachate. The scanning electron microscopy/energy dispersive X-ray spectroscopy study confirmed that arsenic was dissolved from HACSA into the alkali leachate. Furthermore, lead and zinc were precipitated as sulfides from the alkali leachate. The proposed process was a good technique for separation of arsenic and enrichment of valuable metals for further centralized treatment separately. It provided high separation efficiency of arsenic and valuable metals, as well as low environmental pollution.

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Characterization and pH-dependent environmental stability of arsenic trioxide-containing copper smelter flue dust

Cited by 53 publications

References 37 publications

Study on Extraction Separation of Thioarsenite Acid in Alkaline Solution by CO32--Type Tri-n-Octylmethyl-Ammonium Chloride

Study on Extraction Separation of Thioarsenite Acid in Alkaline Solution by CO32--Type Tri-n-Octylmethyl-Ammonium Chloride

Separation and recovery of arsenic from As, Cu, and Zn rich leaching liquor using a reduction-crystallization approach

An effective separation process of arsenic, lead, and zinc from high arsenic-containing copper smelting ashes by alkali leaching followed by sulfide precipitation

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