Removal of sulfate ions from process water by ion exchange resins

Öztürk, Yasemin; Ekmekçi, Zafir

doi:10.1016/j.mineng.2020.106613

Cited by 42 publications

(10 citation statements)

References 19 publications

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“…They are generated in the flotation process water mostly by the oxidation/dissolution of the ore and the addition of flotation chemicals [28]. Recirculation of process water causes a significant increase in ion concentration due to the building up of the ions [29].…”

Section: Water Chemistrymentioning

confidence: 99%

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 Chemistrymentioning

confidence: 99%

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

2022

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“…Ion exchange can be used in a variety of bed configurations and with various resin types but the regeneration of the loaded resin is a critical component of the process and the required reagents are often expensive (Liu et al, 2021). GYP-CIX is a low cost ion-exchange technology for the removal of sulfate, calcium, magnesium and other ions from water (Öztürk and Ekmekçi, 2020). The products of the process are reusable/dischargeable water and solid gypsum product that might also have value, depending on local market potential; it has the potential of being the most cost-effective alternative for sulfate removal.…”

Section: Ion Exchange Processesmentioning

confidence: 99%

Active Physical Remediation of Acid Mine Drainage: Technologies Review and Perspectives

Mulopo¹

2022

J. Ecol. Eng.

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The successful acid mine drainage (AMD) treatment needs site-specific installation and implementation, as well as the deployment of technology that is compatible with the pollutants contained in the AMD. If key by-products of the AMD can be recovered, the financial sustainability of the AMD remediation method may be greatly improved. Additional research into novel and innovative solutions is necessary to advance in this direction. To accomplish this, it is necessary to have a complete awareness of current remediation technologies that are available and accessible. Active physical treatment methods such as ion exchange, adsorption, electrochemistry, and membrane techniques were examined in this article. Membrane technology excels in terms of ease of use, versatility, and environmental effect but produces brine streams the management of which remains vital for future adoption of the technology. Liquid membranes (LM), Micellar Enhanced Ultra-Filtration (MEUF), and Polyelectrolyte Enhanced Ultra-Filtration (PEUF) are all innovative membrane technologies that may provide some possibilities for metal recovery from chemical sludge and/or brine streams. Electrochemical technologies are considered an attractive alternative for AMD treatment, because they require only electricity as a consumable and can treat AMD to high standards by removing metals via (co)precipitation and sulfate via ionic migration (when an anion-exchange membrane is used in the configuration), while producing significantly less sludge. However, the accepted shortcomings include membrane/electrode fouling produced by (co)precipitates on the active surfaces necessary for the process, a lack of understanding regarding the effective scaling up to industrial scale, and the relatively expensive capital expenditure (CAPEX) required. The removal of heavy metals from AMD effluents by adsorption has a number of technical and environmental benefits, including high efficiency, and environmental friendliness. Despite its benefits, this technique has certain hurdles, such as the production process for low-cost adsorbents.

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“…Many technologies and methods have been used to remove dye from wastewater at low concentrations, like chemical precipitation and membrane filtration. Many water treatment techniques, including co-precipitation, 2 ion exchange, 3 and adsorption, have been used to purify wastewater. 4–6 Adsorption methods are widely used in wastewater treatment.…”

Section: Introductionmentioning

confidence: 99%