Recovery of sulphuric acid and added value metals (Zn, Cu and rare earths) from acidic mine waters using nanofiltration membranes

López, J.; Reig, Mònica; Gibert, Oriol; Cortina, José Luis

doi:10.1016/j.seppur.2018.11.022

Cited by 63 publications

(15 citation statements)

References 43 publications

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“…Simultaneous AMD treatment and recovery of valuable resources (sulfuric acid, Zn, Cu, and rare earths) were investigated in a nanofiltration (NF)‐based treatment processes using three types of membranes (Lopez, Reig, Gibert, & Cortina, 2019). Fe(III) concentration had a great impact on sulfuric acid and metal recovery.…”

Section: Recovery Of Resources From Mine Drainagementioning

confidence: 99%

Mine drainage: Remediation technology and resource recovery

Viadero

Zhang

et al. 2020

Water Environment Research

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Drainage from current and historic mining operations remains a persistent environmental problem. Numerous research and development efforts were made in 2019 with a goal to minimize the impact of mine drainage on the environment, while other research endeavors addressed the mine drainage issue from a different perspective, where mine drainage was considered a resource for water and valuable products, such as metals, sulfuric acid, and rare earth elements. Thus, this review has two main sections: (a) focusing on research efforts in mine drainage remediation technology, and (b) emphasizing advances in resource recovery from mine drainage. The first section covers traditional and emerging passive and active treatment technologies. The second section summarizes resource recovery efforts using various technologies, such as selective precipitation, membrane process, and biological systems.

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Section: Recovery Of Resources From Mine Drainagementioning

confidence: 99%

Mine drainage: Remediation technology and resource recovery

Viadero

Zhang

et al. 2020

Water Environment Research

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“…This linear model is based on the assumption that raw materials are abundant and available, easy to obtain, and cheap to dispose of. Circular economy systems maintain the added value in products for as long as possible, while the generation of waste is avoided or reduced [ 16 ].…”

Section: Introductionmentioning

confidence: 99%

Rejection Capacity of Nanofiltration Membranes for Nickel, Copper, Silver and Palladium at Various Oxidation States

et al. 2021

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Electroplating and metalworking industries produce enormous amounts of waste containing heavy metals in their effluents, leading to potential threats to biotic and abiotic life. According to regulation, heavy metal contamination must be kept within the regulated standard of a few parts per million, which has led to a recent pique in interest in the utilization of nanofiltration technology for metal recovery. The effect of feed pH, pressure, metal concentration, and oxidation of metal on the rejection of heavy metal ions using three commercial nanofiltration membranes (NF, NF90, and NF270) were explored. To begin, studies of electrolyte salts, contact angle, and water permeability were employed to characterize the nanofiltration membranes. A dead-end module was used to test the permeation and retention capacities of the nanofiltration membranes. The results showed an increase in salt rejection for all metals examined irrespective of the membrane, at a pH below the isoelectric point. For divalent cations, the NF90 membrane achieved recovery capacities of 97% and 85% at 200 ppm and 20 ppm respectively, as compared to the recovery observed for Ni2+, Cu2+, and Pd2+ ions by NF and NF270. At a pH 2, 20 ppm and 5 bar, the NF90 membrane had the highest percent recovery, but at a pH 3, the recovery was at 95%. Mono and divalent stable Ag+ and Ni2+ ions showed a comparatively high percent recovery as compared to Pd2+ and Cu2+, which have high molecular weight and charge effect. In the presence of chelating agents, the membrane surface area is increased, resulting in high divalent ion recovery capacities due to favourable interaction with the polyamide functional group of the membranes. This study establishes the significance of oxidation in high removal efficiency cation in varying experimental conditions.

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“…Nanofiltration (NF) is an intermediate process of ultrafiltration and reverse osmosis which carries advantages such as the efficient removal of dissolved solutes, including multivalent ions and organic compounds of high molar mass (El Harrak et al, 2015); however, this is done with lower pressure requirements and higher flows then reverse osmosis (López et al, 2019). The evaluation of the optimum operating conditions for each specific NF system allows improvement of the overall performance of the process, both in terms of quality of the permeate and fouling (Andrade et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

The Comparison of Electrodialysis and Nanofiltration in Nitrate Removal from Groundwater

Touir

Kitanou

Zait

et al. 2021

Indonesian J. Sci. Technol

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Nitrate groundwater contamination is of major interest all over the world. This problem arises in agricultural regions across Morocco. An excess amount of nitrate causes a serious problem in urban water networks and human health. Because of these health risks, considerable attention has been paid to find effective treatment processes to reduce nitrate concentrations to safe levels. The World Health Organization has set an acceptable level for nitrate in drinking water at 50 mg/L. The aim of this study is to reduce the nitrate concentration from groundwater using two membrane processes: Electrodialysis (ED) and Nanofiltration (NF). Efficiencies of these two technologies are compared in respect to nitrate ions removal, cost process and final quality of water. The results of technologies show that, for electrodialysis standards level can be achieved for a demineralization rate of 15% and the physico-chemical quality of the produced water is satisfactory. For nanofiltration we obtain a nitrate removal of 90% but the produced water is very de-mineralized and must be remineralized.

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Recovery of sulphuric acid and added value metals (Zn, Cu and rare earths) from acidic mine waters using nanofiltration membranes

Cited by 63 publications

References 43 publications

Mine drainage: Remediation technology and resource recovery

Mine drainage: Remediation technology and resource recovery

Rejection Capacity of Nanofiltration Membranes for Nickel, Copper, Silver and Palladium at Various Oxidation States

The Comparison of Electrodialysis and Nanofiltration in Nitrate Removal from Groundwater

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