Corrugated iron sheets for electrocoagulation of sulphate ions in industrial effluents. (September 2020)

• Record Type: Journal Article
• Authors: Yamba, Siyanda; Moutloali, Richard Motlhaletsi; Mabuba, Nonhlangabezo
• Is Part Of: Case studies in chemical and environmental engineering. Volume 2 (2020)
• Publication Date: 2020-09
• Subjects: Industrial effluents -- Water treatment -- Electrode platform -- Sulphate concentration -- Municipality water; Chemical engineering -- Periodicals; Environmental engineering -- Periodicals; Environmental chemistry -- Periodicals; 628.05
• DOI: 10.1016/j.cscee.2020.100061
• Languages: English
• ISSNs: 2666-0164

Abstract

Abstract: High sulphate concentrations in industrial effluents damage municipality infrastructures. Old corrugated iron was used as an electrode to remove SO4 2- concentration in industrial effluents. Electrodes were characterized using SEM and EDS. The optimised parameters were pH 2, 3000 ​ppm, 15 V and 120 min. In an industrial effluent, 99% of SO4 2- was removed including PO4 2-, F - and COD. The sulphates were physically adsorbed on Zn and Fe hydroxides according to first order kinetics. The corrugated iron is reusable and consumed low energy (0.1725 ​kWh/m 3 ). Graphical abstract: Image 1 Highlights: An old corrugated iron used as a sacrificial electrode in the electrocoagulation process. 95% of the sulphate concentration was removed from industrial effluents. High concentration of sulphates was removed in the presence of potential interfering ions. The electrocoagulation process consumed low energy of 0.1725 ​kWh/m 3 .