Applications of Membrane Processes in Desalination, Wastewater Treatment and Raw Materials Recovery

A special issue of Membranes (ISSN 2077-0375). This special issue belongs to the section "Membrane Applications".

Deadline for manuscript submissions: closed (31 December 2022) | Viewed by 6350

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Guest Editor
Department of Inorganic, Analytical Chemistry and Electrochemistry, Faculty of Chemistry, Silesian University of Technology, B. Krzywoustego 6, 44-100 Gliwice, Poland
Interests: membrane processes; electrodialysis; electrodialysis enhanced with complex formation; metal recovery; wastewater treatment; ionic liquids recovery; separation processes; treatment and purification of wastewaters from the electroplating industry; electrolysis; recycling; environmental technologies

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Guest Editor
Department of Inorganic, Analytical Chemistry and Electrochemistry, Faculty of Chemistry, Silesian University of Technology, B. Krzywoustego 6, 44-100 Gliwice, Poland
Interests: membrane processes; electrodialysis; bipolar membrane electrodialysis; nanofiltration, reverse osmosis; boron removal; wastewater treatment; separation processes
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Special Issue Information

Dear Colleagues,

In recent years, interest in developing methods for desalination, wastewater treatment, and raw materials recovery has grown steadily within the scientific community. Membrane methods dedicated to desalination and wastewater treatment include electrodialysis, nanofiltration, ultrafiltration, reverse osmosis, and forward osmosis. Important applications of the aforementioned methods include brackish water desalination, demineralization of food products (whey), and recovery of metal salts and ionic liquids from industrial wastewaters. Membrane techniques also play an important role in the exploitation, management, and treatment of water resources. Moreover, membrane treatment can be an ecologically and ultimately economically superior alternative to other common solution treatment techniques.

This Special Issue will focus on research papers on electrodialysis, nanofiltration, ultrafiltration, reverse osmosis, forward osmosis development, and application in desalination, wastewater treatment, and raw materials recovery. Especially papers on the electrodialysis application as a novel way of minimizing hazardous effects of effluents on the environment, as well as environmental restoration, including soil and groundwater remediation, will be of interest. Moreover, papers on the ion-exchange membranes’ characteristics and their behavior in electromembrane processes will be considered. We welcome papers reporting on ion transport across ion-exchange membranes in electrodialysis used for desalination, wastewater treatment, and raw materials recovery. Scientific work aimed at new areas of membrane process applications in various industrial technologies will also be included.

We invite you to contribute full scientific papers, communications, or reviews to this Special Issue. In all cases, the papers must demonstrate novelty and importance to the scope.

Dr. Dorota Babilas
Prof. Dr. Piotr Dydo
Guest Editors

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Keywords

  • chemical engineering
  • desalination
  • electrodialysis
  • nanofiltration
  • ultrafiltration
  • reverse osmosis
  • forward osmosis
  • ionic liquids
  • new ion-exchange membranes
  • resource recovery
  • wastewater treatment

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Published Papers (3 papers)

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16 pages, 4966 KiB  
Article
Ag-CuO-Decorated Ceramic Membranes for Effective Treatment of Oily Wastewater
by Amos Avornyo, Arumugham Thanigaivelan, Rambabu Krishnamoorthy, Shadi W. Hassan and Fawzi Banat
Membranes 2023, 13(2), 176; https://doi.org/10.3390/membranes13020176 - 1 Feb 2023
Cited by 20 | Viewed by 1945
Abstract
Although ultrafiltration is a reliable method for separating oily wastewater, the process is limited by problems of low flux and membrane fouling. In this study, for the first time, commercial TiO2/ZrO2 ceramic membranes modified with silver-functionalized copper oxide (Ag-CuO) nanoparticles [...] Read more.
Although ultrafiltration is a reliable method for separating oily wastewater, the process is limited by problems of low flux and membrane fouling. In this study, for the first time, commercial TiO2/ZrO2 ceramic membranes modified with silver-functionalized copper oxide (Ag-CuO) nanoparticles are reported for the improved separation performance of emulsified oil. Ag-CuO nanoparticles were synthesized via hydrothermal technique and dip-coated onto commercial membranes at varying concentrations (0.1, 0.5, and 1.0 wt.%). The prepared membranes were further examined to understand the improvements in oil-water separation due to Ag-CuO coating. All modified ceramic membranes exhibited higher hydrophilicity and decreased porosity. Additionally, the permeate flux, oil rejection, and antifouling performance of the Ag-CuO-coated membranes were more significantly improved than the pristine commercial membrane. The 0.5 wt.% modified membrane exhibited a 30% higher water flux (303.63 L m−2 h−1) and better oil rejection efficiency (97.8%) for oil/water separation among the modified membranes. After several separation cycles, the 0.5 wt.% Ag-CuO-modified membranes showed a constant permeate flux with an excellent oil rejection of >95% compared with the unmodified membrane. Moreover, the corrosion resistance of the coated membrane against acid, alkali, actual seawater, and oily wastewater was remarkable. Thus, the Ag-CuO-modified ceramic membranes are promising for oil separation applications due to their high flux, enhanced oil rejection, better antifouling characteristics, and good stability. Full article
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11 pages, 1506 KiB  
Article
Scalant Removal at Acidic pH for Maximum Ammonium Recovery
by Hanna Kyllönen, Juha Heikkinen, Eliisa Järvelä and Antti Grönroos
Membranes 2022, 12(12), 1233; https://doi.org/10.3390/membranes12121233 - 5 Dec 2022
Viewed by 1589
Abstract
One option for new nitrogen sources is industrial liquid side streams containing ammonium nitrogen (NH4-N). Unfortunately, NH4-N often exists in low concentrations in large water volumes. In order to achieve a highly concentrated NH4-Nsolution, scalant removal is [...] Read more.
One option for new nitrogen sources is industrial liquid side streams containing ammonium nitrogen (NH4-N). Unfortunately, NH4-N often exists in low concentrations in large water volumes. In order to achieve a highly concentrated NH4-Nsolution, scalant removal is needed. In this study, scalant removal by precipitation was investigated. At alkali pH, sodium carbonate (Na2CO3) was used as a precipitation chemical while at acidic pH, the chemical used was oxalic acid (C2H2O4). At alkali pH, high Na2CO3 dose was needed to achieve low content of calcium, which, with sulphate, formed the main scalant in the studied mine water. NH4-N at alkali pH was in the form of gaseous ammonia but it stayed well in the solution during pre-treatment for nanofiltration (NF) and reverse osmosis (RO). However, it was not rejected sufficiently, even via LG SW seawater RO membrane. At acidic pH with CaC2O4 precipitation, NF90 was able to be used for NH4-N concentration up to the volume reduction factor of 25. Then, NH4-N concentration increased from 0.17 g/L to 3 g/L. NF270 produced the best fluxes for acid pre-treated mine water, but NH4-N rejection was not adequate. NF90 membrane with mine water pre-treated using acid was successfully verified on a larger scale using the NF90-2540 spiral wound element. Full article
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17 pages, 3396 KiB  
Article
An Ionic Supported Liquid Membrane for the Recovery of Bisphenol A from Aqueous Solution
by Manal Aldwaish, Noura Kouki, Azizah Algreiby, Haja Tar, Rafik Tayeb and Amor Hafiane
Membranes 2022, 12(9), 869; https://doi.org/10.3390/membranes12090869 - 8 Sep 2022
Cited by 5 | Viewed by 2070
Abstract
In this work, a flat supported liquid membrane (FSLM) was applied for the extraction of bisphenol A (BPA) from aqueous solutions, using an ionic liquid as a carrier. The liquid membrane consists of tricaprylmethylammonium chloride (aliquat 336®) diluted in 2-octanol. Furthermore, [...] Read more.
In this work, a flat supported liquid membrane (FSLM) was applied for the extraction of bisphenol A (BPA) from aqueous solutions, using an ionic liquid as a carrier. The liquid membrane consists of tricaprylmethylammonium chloride (aliquat 336®) diluted in 2-octanol. Furthermore, to obtain the best transport efficiency, the impacts of various experimental parameters were investigated. These parameters included aliquat 336® concentration, the concentration of BPA in the feed phase, the pH of the feed phase, the concentration of NaOH in the receiving phase, the polymeric support nature, the percentage of extractant in the organic phase, and the solvent nature. The optimum conditions of the experiment were 50% (v/v) aliquat 336®/2-octanol as the organic phase, a transport time of 8 h, and 1 × 10−2 mol L−1 NaOH as the receiving phase. The BPA was successfully recovered (the recovery percentage was about 89%). Supported liquid membrane-based aliquat 336®/2-octanol displayed an acceptable stability with re-impregnation after 5 days of operation. Full article
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