Evaluation of NF membranes as treatment technology of acid mine drainage: metals and sulfate removal

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

doi:10.1016/j.desal.2018.03.030

Cited by 46 publications

(17 citation statements)

References 37 publications

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“…The permeate flux, on the other hand, was higher as the pH value increased. This is contributed by the fact that the membrane became more negatively charged with increasing pH value as can be seen in Figure 2, resulting in a higher hydrophilicity [26][27][28][29]. As reported in the literature, dissociating groups in the polymer skin layer can make the surface more hydrophilic and looser, when charges of the polymer chains start to repel each other at elevated pH [17].…”

Section: Nf Performance In Single Salt Solutionsmentioning

confidence: 70%

Nanofiltration of Simulated Acid Mine Drainage: Effect of pH and Membrane Charge

Siew¹,

Zedda²,

Велизаров³

2020

Applied Sciences

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Acid mine drainage (AMD) is a severe form of environmental pollution that has the potential to contaminate surface and ground waters by introducing heavy metals and lowering the pH. The feasibility of using nanofiltration (NF) as a potentially attractive and cost-effective remediation method to treat acid mine drainage was investigated in this study. The performance of an acid-stable NF membrane focusing on the effects of the water pH and membrane charge on ion rejection was systematically studied. A single salt solution experiment showed that Mg, Cu, and Mn containing species were highly rejected at above 97%. Below the membrane iso-electric point (IEP), Mn showed an increased rejection of 99%, while Mg and Mn rejections were relatively constant within the investigated pH range of pH 2 to 7. Rejection of monovalent Cl− decreased with increasing concentration of an accompanying divalent SO42−, showing that Donnan related effects are more prominent at higher ionic concentrations. The sulfate rejection decreased drastically below pH 3 due to the formation of HSO4−, which permeated through the membrane, which can be utilized as a way of separation of the metals from the accompanying sulfur-containing compounds. For mixed salt solutions, rejection of silicate dropped from 52% to 38% when magnesium sulfate was added, owing to shielding of the membrane surface charge by Mg2+ ions. The NF process performance with a simulated AMD solution was found to be similar to that with model salt solution experiments, both in terms of ion rejection values and general pH-dependent rejection trends. The results obtained can be used as a fast preliminary tool for evaluating the feasibility of using NF for treating AMD with a given ionic composition and pH.

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Section: Nf Performance In Single Salt Solutionsmentioning

confidence: 70%

Nanofiltration of Simulated Acid Mine Drainage: Effect of pH and Membrane Charge

Siew¹,

Zedda²,

Велизаров³

2020

Applied Sciences

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“…Major foulant was found to be gypsum, which by the addition of antiscalant was managed. Lopez, Reig, Gibert, Valderrama, Reig, Gibert, Valderrama, and Cortina (2018) evaluated the recovery of sulfuric acid and dissolved transition metal testing two semi-aromatic polyamides NF (NF270) and sulfonated polyethersulfone NF. The test unit included a full-scale vessel with six spiral wound membrane modules in series.…”

Section: Miningmentioning

confidence: 99%

Membrane processes

Arabi¹,

Pellegrin

Aguinaldo

et al. 2020

Water Environment Research

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This literature review provides a review for publications in 2018 and 2019 and includes information membrane processes findings for municipal and industrial applications. This review is a subsection of the annual Water Environment Federation literature review for Treatment Systems section. The following topics are covered in this literature review: industrial wastewater and membrane. Bioreactor (MBR) configuration, membrane fouling, design, reuse, nutrient removal, operation, anaerobic membrane systems, microconstituents removal, membrane technology advances, and modeling. Other subsections of the Treatment Systems section that might relate to this literature review include the following: Biological Fixed-Film Systems, Activated Sludge, and Other Aerobic Suspended Culture Processes, Anaerobic Processes, and Water Reclamation and Reuse. This publication might also have related information on membrane processes: Industrial Wastes, Hazardous Wastes, and Fate and Effects of Pollutants.

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“…Thus for instance, solution–diffusion–electromigration model (SDEM) of NF accounts for the ion transport due to transmembrane electric fields that spontaneously arise owing to different membrane permeances to cations and anions [ 10 ]. This approach has been extensively tested [ 11 , 12 , 13 , 14 , 15 ] and demonstrated to reproduce several observed experimental trends using a limited number of adjustable parameters.…”

Section: Introductionmentioning

confidence: 99%

Nanofiltration of Multi-Ion Solutions: Quantitative Control of Concentration Polarization and Interpretation by Solution-Diffusion-Electro-Migration Model

Labastida

Yaroshchuk

2021

Membranes

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For effective use of advanced engineering models of nanofiltration quality of experimental input is crucial, especially in electrolyte mixtures where simultaneous rejections of various ions may be very different. In particular, this concerns the quantitative control of concentration polarization (CP). This work used a rotating disklike membrane test cell with equally accessible membrane surface, so the CP extent was the same over the membrane surface. This condition, which is not satisfied in the conventional membrane test cell, made possible correcting for CP easily even in multi-ion systems. Ion rejections were studied experimentally for several dominant salts (NaCl, MgCl2, Na2SO4 and MgSO4) and trace ions (Na+, NH4+, Cl− and NO3−) using NF270 membrane. The solution–diffusion–electro–migration model was used to obtain ion permeances from the experimental measurements. The model could well fit the experimental data except in the case of NH4+. The correlations between the ion permeances and type of dominant salt are discussed in the context of the established mechanisms of NF such as Donnan and dielectric exclusion. The obtained information contributes to the systematic transport characterization of NF membranes and may be ultimately useful for computational fluid dynamics simulations of the performance of the membranes in various applications.

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Evaluation of NF membranes as treatment technology of acid mine drainage: metals and sulfate removal

Cited by 46 publications

References 37 publications

Nanofiltration of Simulated Acid Mine Drainage: Effect of pH and Membrane Charge

Nanofiltration of Simulated Acid Mine Drainage: Effect of pH and Membrane Charge

Membrane processes

Nanofiltration of Multi-Ion Solutions: Quantitative Control of Concentration Polarization and Interpretation by Solution-Diffusion-Electro-Migration Model

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