Potential use of ultrafiltration (UF) membrane for remediation of metal contaminants

Siddique, Affia; Yaqoob, Asim Ali; Mirza, Muhammad A.; Kanwal, Ansa; Ibrahim, Mohamad Nasir Mohamad; Ahmad, Akil

doi:10.1016/b978-0-12-822880-7.00018-2

Cited by 5 publications

(4 citation statements)

References 87 publications

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“…Membrane separation is widely used for water desalination [ 1 ], solvent purification [ 2 ], and wastewater treatment in different industries such as petrochemical [ 3 ], food [ 4 ], etc. Pressure-driven processes such as microfiltration (MF), ultrafiltration (UF) [ 5 , 6 ], nanofiltration (NF) [ 7 , 8 ], and reverse osmosis (RO) [ 9 ] are commonly used technologies. The RO membranes, which can reject monovalent salts, are the most selective membranes for pressure-driven processes.…”

Section: Introductionmentioning

confidence: 99%

Incorporation of Functionalized Halloysite Nanotubes (HNTs) into Thin-Film Nanocomposite (TFN) Nanofiltration Membranes for Water Softening

et al. 2023

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Incorporating nanoparticles (NPs) into the selective layer of thin-film composite (TFC) membranes is a common approach to improve the performance of the resulting thin-film nanocomposite (TFN) membranes. The main challenge in this approach is the leaching out of NPs during membrane operation. Halloysite nanotubes (HNTs) modified with the first generation of poly(amidoamine) (PAMAM) dendrimers (G1) have shown excellent stability in the PA layer of TFN reverse-osmosis (RO) membranes. This study explores, for the first time, using these NPs to improve the properties of TFN nanofiltration (NF) membranes. Membrane performance was evaluated in a cross-flow nanofiltration (NF) system using 3000 ppm aqueous solutions of MgCl2, Na2SO4 and NaCl, respectively, as feed at 10 bar and ambient temperature. All membranes showed high rejection of Na2SO4 (around 97–98%) and low NaCl rejection, with the corresponding water fluxes greater than 100 L m−2 h−1. The rejection of MgCl2 (ranging from 82 to 90%) was less than that for Na2SO4. However, our values are much greater than those reported in the literature for other TFN membranes. The remarkable rejection of MgCl2 is attributed to positively charged HNT-G1 nanoparticles incorporated in the selective polyamide (PA) layer of the TFN membranes.

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Section: Introductionmentioning

confidence: 99%

Incorporation of Functionalized Halloysite Nanotubes (HNTs) into Thin-Film Nanocomposite (TFN) Nanofiltration Membranes for Water Softening

et al. 2023

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“…For this reason, these methods have been defined by the European Commission as a tool complying with the principles of the circular economy and enabling their effective implementation [ 16 , 17 ]. The use of membrane processes, including micellar-enhanced ultrafiltration (MEUF) [ 18 ], polymer-enhanced ultrafiltration (PEUF) [ 19 , 20 ], reverse osmosis (RO) [ 21 ], and nanofiltration (NF) [ 22 ], offers interesting possibilities in regard to the removal of heavy metal ions from galvanic wastewater. However, RO and NF processes need to be preceded by wastewater pre-treatment that can employ classic chemical precipitation methods, which unfortunately involve the generation of sludge and residues that have to be disposed of.…”

Section: Introductionmentioning

confidence: 99%

Circular Economy Approach in Treatment of Galvanic Wastewater Employing Membrane Processes

et al. 2023

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According to the idea of sustainable development, humanity should make every effort to care for the natural environment along with economic development. Decreasing water resources in the world makes it necessary to take action to reduce the consumption of this resource. This article presents the results of research conducted to improve the use of recyclable materials in line with the circular economy model. The research focused on the development of a technological solution for the recovery of raw materials from galvanic wastewater. The concept of a galvanic wastewater treatment system presented in the article includes wastewater pre-treatment in the ultrafiltration (UF) process and water recovery in the reverse osmosis (RO) process. In addition, the purpose of the work was to manage post-filtration waste (RO retentate) containing high concentrations of zinc in the process of galvanizing metal details. The obtained results indicate that it is possible to reduce the amount of sewage from the galvanizing industry by reusing the recovered water as technical water in the process line. The carried-out model tests of galvanizing confirmed the possibility of using RO retentate for the production of metal parts. The achieved results are a proposal to solve the problem of reducing the impact of galvanic wastewater on the environment and to improve the profitability of existing galvanizing technologies by reducing the consumption of water and raw materials.

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“…5 Due to its pressure-driven nature and ability to retain organic, inorganic, and microbiological contaminants, ultrafiltration (UF) is recognized as a flexible technique. 6 In wastewater treatment, chemical processing, and food processing, UF membranes are frequently utilized. 7 While suspended particles and dissolved substances with high molecular weight are confined, water as well as other solutes with a small molecular weight pass past the barrier.…”

Section: Introductionmentioning

confidence: 99%

“…Due to its pressure-driven nature and ability to retain organic, inorganic, and microbiological contaminants, ultrafiltration (UF) is recognized as a flexible technique . In wastewater treatment, chemical processing, and food processing, UF membranes are frequently utilized .…”

Section: Introductionmentioning

confidence: 99%

Poly(methyl vinyl ether-alt-maleic acid)-Coated Poly(ether ether) Sulfone Ultrafiltration Membranes Augmented with Silver Nanoparticles for the Removal of Proteins and Pesticides from Aqueous Solutions

Vaidyanathan,

Senthil Kumar,

George

et al. 2023

Ind. Eng. Chem. Res.

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The huge prevalence of pesticides in freshwater sources has led to a current demand for a modified polymer membrane with greater hydrophilic and antifouling qualities. Filtration of those pesticides using membranes remains a challenge due to fouling effects. Here, a ultrafiltration poly(ether ether) sulfone (PEES) polymer membrane was customized by the addition of a biocompatible poly(methyl vinyl ether-alt-maleic acid) (PMVEAMA) copolymer and by the inclusion of silver nanoparticles (AgNPs). The PEES/PMVEAMA/AgNPs polymer membrane was designed by the phase inversion method to efficiently separate proteins and pesticides. The synthesized membranes were characterized by scanning electron microscopy, X-ray diffraction, and attenuated total reflectance-Fourier transform infrared spectroscopy, which revealed the membranes' pore formation, functional group, and crystalline nature. The incorporation of 1.5 wt % AgNPs elevates the performance of the polymer membrane. The modified membrane exhibited a significant increase in contact angle (67°), water content (77%), porosity (83.9%), and flux (329 Lm −2 h −1 ). The PEES/PMVEAMA with 1.5 wt % AgNPs exhibited a molecular cutoff of 8000 Da and accelerated the rejection of pentachlorophenol from 49 to 69%. Meanwhile, the PEES/PMVEAMA/AgNPs hybrid membrane showed a flux recovery ratio of 93% for bovine serum albumin and 95% for pentachlorophenol. Significantly, the AgNPs-functionalized polymer membrane displayed reduced irreversible fouling (4.2% for pentachlorophenol and 6.2% for albumin). Thus, the current study provides a novel perspective that the integration of biobased PMVEAMA and Ag-NPs has enhanced the membrane's antifouling performance and hydrophilicity and also increased its separation of proteins and pesticides from aqueous solutions.

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Potential use of ultrafiltration (UF) membrane for remediation of metal contaminants

Cited by 5 publications

References 87 publications

Incorporation of Functionalized Halloysite Nanotubes (HNTs) into Thin-Film Nanocomposite (TFN) Nanofiltration Membranes for Water Softening

Incorporation of Functionalized Halloysite Nanotubes (HNTs) into Thin-Film Nanocomposite (TFN) Nanofiltration Membranes for Water Softening

Circular Economy Approach in Treatment of Galvanic Wastewater Employing Membrane Processes

Poly(methyl vinyl ether-alt-maleic acid)-Coated Poly(ether ether) Sulfone Ultrafiltration Membranes Augmented with Silver Nanoparticles for the Removal of Proteins and Pesticides from Aqueous Solutions

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