Studi Pengaruh Variasi Ph Awal dan Laju Alir terhadap Kinerja Reaktor Elektrokoagulasi Kontinu untuk Penyisihan Sulfat

Abstract

One of the polluting parameters in water is sulfate ions. Sulfate ions in excess quantities can cause damage to industrial equipment as well as laxative effects if consumed. One technology to remove sulfate ions is by electrocoagulation. In this study, electrocoagulation was carried out with a continuous system using iron electrodes (Fe) at variations in solution pH (5, 6, 7) and flow rate (90, 110, 130 mL/min). The results of this study obtained the best sulfate removal efficiency value, which was 41.1% at the initial pH 7 and flow rate of 90 mL/min. Based on the results of the T test, it is known that the initial pH variable does not significantly affect the sulfate removal efficiency (p >0.05), while the flow rate variable has a significant effect on the sulfate removal efficiency (p <0.05). The results of the F test showed that the initial pH and flow rate variables simultaneously had a significant effect on the sulfate removal efficiency (p <0.05). From the results of the adsorption model analysis, the appropriate adsorption kinetics model for sulfate adsorption by iron electrodes is a first-order pseudo-model, and the corresponding adsorption isotherms model for sulfate adsorption by iron electrodes is the Freundlich isotherm model. The operational cost required for sulfate removal by continuous electrocoagulation is IDR 833.96/m3 of treated wastewater