Fabrication of carbon-based hydrogel membrane for landfill leachate wastewater treatment

Document Type

Journal Article

Publication Title

Desalination

Volume

564

Publisher

Elsevier

School

School of Engineering

RAS ID

58433

Funders

Australian Training and Research Scholarship

Comments

Karbassiyazdi, E., Altaee, A., Ibrar, I., Razmjou, A., Alsaka, L., Ganbat, N., . . . Khabbaz, H. (2023). Fabrication of carbon-based hydrogel membrane for landfill leachate wastewater treatment. Desalination, 564, article 116783. https://doi.org/10.1016/j.desal.2023.116783

Abstract

The challenge of effectively managing the discharge of metal ions into aquatic environments, which poses a significant risk to both human health and ecosystems, persists despite the availability of various analytical tools and techniques. There are limitations of existing separation technologies and the inefficacy of hydrogel materials in removing low molecular weight contaminants, such as metal ions, in aqueous solutions. This study added carbon powder to the hydrogel membrane to reduce the low-mechanical strength and drying problems and increase its capacity for adsorbing ionic and non-ionic substances. The study introduced a novel carbon-based aluminium hydroxide hydrogel for wastewater filtration. CG was characterized using various analytical techniques, including examining surface morphology, elemental analysis, surface functional groups, and surface charge. These analytical tools provided a comprehensive understanding of the properties and performance of the CG. The effects of different carbon-based hydrogel (CG) concentrations on water flux and ion rejection were evaluated in a gravity filtration setup. Experiments investigated the influence of different ion concentrations, activated carbon (AC) concentration, centrifugation, water flux, and rejection on removing heavy metals from synthetic and natural wastewater. The pure water flux of the hydrogel membrane was 120 LMH. The results indicated that an AC concentration of 4g/L in the aqueous solution is optimal for heavy metals removal, with 99.9 % removal for Pb2+ and Cu2+, 84 % rejection for Ca2+, and 85 % rejection for Mg2+ in 10 mg/L of synthetic water. Besides, the 4g/LAC hydrogel membrane removed 90 % of Ni, Zn, Pb, As, and Cu ions and 53 % of the total organic carbon from leachate wastewater.

DOI

10.1016/j.desal.2023.116783

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