Removal of arsenic from water by combination of electro‐oxidation and polymer enhanced ultrafiltration

Abstract

Water-soluble poly[glycidyl methacrylate N-methyl D-glucamine], P(GMA-NMG), was synthesized and purified by ultrafiltration membranes. It was subsequently used for arsenic removal by coupling electro-oxidation (EO) and polymerenhanced ultrafiltration (PEU) processes. In the EO-PEU combined process, P(GMA-NMG) was first used as supporting electrolyte during the exhaustive electro-oxidation of As(III) to As(V) and then it was used to remove As(V) from aqueous solution through PEU. At first stage, the complete EO of As(III) to As(V) was performed with a platinum reticulated vitreous carbon (RVC)-modified electrode and the advancement of the electrolysis was monitored by analytical electrodes. After the oxidation of As(III) to As(V), the PEU was carried out by washing method using regenerate cellulose membrane and 1 bar of pressure. The effects of supporting electrolytes and pH on EO-PEU combined process were investigated. The best results showed that by using P(GMA-NMG) as supporting electrolyte during the complete electrooxidation of As(III) to As(V) followed by PEU separation, almost 80% of As(V) was removed at pH 10.

Electrospun Nanofibrous Membranes for Water Treatment

“…The UF process plays a crucial role in the water treatment for rejecting different contaminants, viruses, bacteria, and colloids. Moreover, this is a promising pretreatment filtration for RO desalination [122,123]. It is also a practical separation process in food industry, for instance for wastewater treatment or cheese processing [124].…”

Treatment Study of Brook Water by Using the Ultrafiltration Pilot with Polymeric Membrane

“…These polymer-enhanced membranes have been tested and recommended where wastewater comes from battery manufacturing as well as from mining activities to treat and remove the respective metals [53][54][55].…”

Water-Soluble and Insoluble Polymers, Nanoparticles, Nanocomposites and Hybrids With Ability to Remove Hazardous Inorganic Pollutants in Water

“…Future trends concerning to LPR technique involve the developments of hybrid methods. Those methods include the use of LPR as a pre or post treatment in combined methods such as chemical or electrochemical oxidation/reduction coupled to ultrafiltration using water-soluble polymers (Arar et al, 2014 ; Sánchez et al, 2015 , 2017 ; Chou et al, 2018 ). In addition, photocatalysis has been used in combination to LPR to remove improve removal capacities of arsenic (Yuksel et al, 2014 ; Molinari and Argurio, 2017 ).…”

“…In other example, electrochemical oxidation of As(III) to As(V) was performed with metallic electrodes in presence of water-soluble polymers and the ultrafiltration was applied subsequently to remove the total As(V) from aqueous solution (Arar et al, 2014 ). In the study poly[glycidyl methacrylate N-methyl D-glucamine], P(GMA-NMG), was synthesized and purified by ultrafiltration membranes.…”