Advanced eco-friendly and adsorptive membranes based on Sargassum dentifolium for heavy metals removal, recovery and reuse. (October 2020)

• Record Type: Journal Article
• Authors: Mansor, Eman S.; Labena, Ahmed; Moghazy, Reda M.; Abdelhamid, Ahmed E.
• Is Part Of: Journal of water process engineering. Volume 37(2020)
• Publication Date: 2020-10
• Subjects: Sargassum dentifolium -- Cellulose acetate -- Mixed matrix membrane -- Ecofriendly adsorption -- Heavy metals removal; Water-supply engineering -- Periodicals; Saline water conversion -- Periodicals; Seawater -- Distillation -- Periodicals; Sanitary engineering -- Periodicals; Sewage -- Purification -- Periodicals; 627
• DOI: 10.1016/j.jwpe.2020.101424
• Languages: English
• ISSNs: 2214-7144

Abstract

Graphical abstract: Highlights: Mixed matrix membrane based on Sargassum dentifolium CA-S was successfully fabricated. Enhancement the adsorption properties of Cd and Zn from aqueous solution. The removal process had sustainable, economically, and environmentally approach. 95.9 % of Cd 2+ was removed over CA-S mixed matrix membrane. Effect of dose, pH, heavy metal concentration and factorial design were studied. Abstract: Promising adsorptive mixed matrix membranes consisted of cellulose acetate (CA), as a polymer, and fine grinded Sargassum dentifolium (S) with different ratios, as adsorbent micro-particles, were prepared and investigated for Cd 2+ and Zn 2+ metal-ions removal. Different analytical techniques as Attentuated Total Reflectance Fourier Transform Infrared (ATR-FTIR), Scanning Electron Microscope (SEM) and Energy Dispersive X-ray microanalysis (EDX), porosity and swelling were performed for the prepared membranes. The morphological investigation showed well dispersion of the algal micro-particles and the high pore density of the mixed membrane compared to the blank one (CA only). The effect of different parameters that affecting the adsorption process as Sargassum dentifolium embedding ratio, pH, contact time and metal ions concentrations were optimized in order to get the highest removal efficiencies followed by full factorial design experiment. The adsorption results showed the maximum removal efficiencies of the CA-S membrane for 100 mg L −1 of both Cd 2+ and Zn 2+ were 95.9 and 82.79 % with dose 1.5 g L −1 and 2 g L −1, respectively. The adsorption isotherm, kinetics, and regeneration studies were displayed in order to determine the nature of the reaction and re-usability of the membrane. The adsorption process was related to Freundlich isotherm that describes the multilayer and heterogeneous adsorption of molecules to the adsorbent surface, and the pseudo first order kinetic was the most represent kinetic model for the adsorption process. Factorial experiments displayed that, time, pH and interaction between time and pH were the most significant factors in the adsorption process. This study proposed a new generation of adsorptive mixed matrix membranes based on the cellulose acetate and the algal micro-particles.