Removal of the residual xanthate from flotation plant tailings using bentonite modified by magnetic nano-particles

Amrollahi, Azadeh; Massinaei, M.; Moghaddam, Ali Zeraatkar

doi:10.1016/j.mineng.2019.01.031

Cited by 69 publications

(20 citation statements)

References 32 publications

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“…The results showed that AC was an effective material for the removal of xanthate in aqueous solutions. Similar results were reported in various studies using AC [33] and bentonite as adsorbents [17]. Modified bentonite has been used successfully to remove 92.7% xanthate from the flotation plant water of a copper mine [18].…”

Section: Water Chemistrysupporting

confidence: 85%

“…In recent years, several methods have been developed to remove the residual xanthate from the aqueous solutions, such as chemical oxidation by ozone [13,14], hydrogen peroxide, Fenton and simulated solar photo-Fenton processes [15]; biodegradation [16], adsorption by bentonite [17,18], modified montmorillonites [19] and activated carbon [20]. Chemical oxidation is an efficient method, however considering the generation of the by-products that may be harmful to the process, it is not efficient in practice.…”

Section: Introductionmentioning

confidence: 99%

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Effects of Residual Xanthate on Flotation Efficiency of a Cu-Zn Sulfide Ore

2022

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Reuse of process water in the flotation of sulfide ores has crucial importance for environmental sustainability and improved process economy. However, the chemistry of process water may be a critical subject for the flotation efficiency as the dissolved ion concentration increases with water reuse. In this study, the effects of water reuse on the flotation efficiency of a Cu-Zn sulfide ore were investigated. The flotation flowsheet consists of a pre-flotation section to remove the naturally floatable talc particles, and sequential copper and zinc flotation sections. Calcium, sulfate, thiosulfate, and xanthate were found as major contaminating ionic species in the process water discharged from flotation circuits. The flotation tests with recirculated water from the zinc rougher tailing revealed that the presence of residual xanthate caused unintentional activation of copper minerals in the pre-float section. Copper recovery increased in the pre-flotation section and resulted in the loss of copper to the pre-float concentrate, which is considered as a tailing stream in the current flowsheet. Various types of activated carbon samples were tested to remove the residual xanthate from the tailing water. The carbon samples could be regenerated by heat treatment and reused for water treatment. Performance of the activated carbon samples was directly related to the pore size and surface area. Carbon-treated tailing water could be re-used in flotation without affecting the flotation performance.

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Section: Water Chemistrysupporting

confidence: 85%

Section: Introductionmentioning

confidence: 99%

Effects of Residual Xanthate on Flotation Efficiency of a Cu-Zn Sulfide Ore

2022

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“…According to the literature report, some mineral materials, such as modified montmorillonite and bentonite, could be excellent adsorbents for removing residual xanthate in MPW. 55 The adsorption is an entropy-driven spontaneous process; adsorbent dosage, solution pH, temperature, treatment time and the concentration of pollutants are essential parameters affecting removal efficiency. Even at a high xanthate concentration of 1 g L −1 , the modified bentonite can remove over 90% of residual xanthate from actual flotation tailings.…”

Section: Technologies For Mpw Treatmentmentioning

confidence: 99%

Recent advances in the treatment and recycling of mineral processing wastewater

Jing

Meng

Sun

et al. 2023

Environ. Sci.: Water Res. Technol.

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“…In destructive methods, xanthates are cleaved to smaller molecules by acid decomposition or either conventional or advanced chemical oxidation. Advanced chemical oxidation includes ozone oxidation, as well as Fenton and photocatalytical methods. − Materials that collect the xanthate from wastewaters are usually based on zeolite-type materials. ,− These materials produce a great amount of waste, as they can be used only once. For sulfate anions, there are already some re-useable materials under development, based on resins and modified silica gels. , Even biological methods ,− are available for xanthates, utilizing divergent bacteria and algae, but these methods cannot be applied during cold winters of the arctic regions.…”

Section: Introductionmentioning

confidence: 99%

Uptake of Ethyl Xanthate to Metal Organic Frameworks

Kuosmanen,

Sievänen,

Lahtinen

2023

ACS Omega

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As the mining industry spreads to new areas in the arctic regions, the need for re-useable efficient methods for mine chemicals' recycling increases. Especially in the case of xanthates, which are used as collectors for many metals from ore. Xanthates are very toxic to aquatic life either directly or indirectly and cause potentially severe health problems to humans after long-term exposure. In the present work, potassium ethyl xanthate (KEX) was observed to coordinate into metal organic frameworks (MOFs). HKUST-1 and its post-synthetically modified forms were observed to behave most effectively of the studied MOFs at low concentrations of KEX. Differences in the uptake of KEX were detected regarding the synthesis method in the case of MIL-100(Fe) synthetized by solvothermal and mechanochemical methods. Other studied MOFs, UiO-66 and MIL-100(Al)/MIL-96(Al), were not observed to be effective in KEX uptake.

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Removal of the residual xanthate from flotation plant tailings using bentonite modified by magnetic nano-particles

Cited by 69 publications

References 32 publications

Effects of Residual Xanthate on Flotation Efficiency of a Cu-Zn Sulfide Ore

Effects of Residual Xanthate on Flotation Efficiency of a Cu-Zn Sulfide Ore

Recent advances in the treatment and recycling of mineral processing wastewater

Uptake of Ethyl Xanthate to Metal Organic Frameworks

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