Treatment of Pb(II) Metal in Wastewater Using Combination Method of Electrocoagulation − Activated Carbon Adsorption

Abstract

Metal Pb(II) is one of the pollutants that causes water pollution and impacts ecosystem damage. Pb(II) metal waste is toxic and biomagnification, so it harms human health. The combination of electrocoagulation and adsorption processes is an efficient and effective alternative in removing Pb(II) metal in wastewater. In this study, the wastewater treatment process is carried out in batch using electrocoagulation with aluminum electrodes and followed by activated carbon adsorption. This research aimed to analyze the effect of electrical voltage in electrocoagulation, adsorption time, and adsorbent dose on reducing Pb(II) concentration. Electrocoagulation and adsorption processes were used variations of electrical voltage (10, 20, 30 V), adsorption times (15, 30, 45 minutes), and adsorbent doses (2,5, 3,3, 4,1, 5 g/L). The research showed that the combination of electrocoagulation and adsorption could significantly reduce Pb(II) concentration in wastewater. Increased electrical voltage, adsorption time, and adsorbent dose lead to increased Pb(II). The maximum removal efficiency of Pb(II) metal was obtained under voltage of 30 V, 45 minutes adsorption time, and 5 g/L adsorbent dose. This condition resulted in removal efficiency Pb(II) of 96,01%.

Pretreatment of Used Cooking Oil Using Avocado Seed Adsorbent for Biodiesel Production Preparation

“…06-3730-1995, namely water content of 4.55%, ash content of 3.05%, volatile matter content of 13.90%, carbon content of 78.51%, and iodine absorption of 888.07 mg/g. The combination of electrocoagulation and adsorption of activated carbon from avocado seeds can reduce the concentration of Pb 2+ ions in wastewater by 96.01% (Setiawan et al, 2020) (Kartika et al, 2017). The results of the test of peroxide number, acid number, FFA content, and water content of black UCO after purification using activated carbon of avocado seeds were 7.89 O2/100 g, 1.46 mg KOH/g, 0.64 % (w/w), and 0.61% (w/w), while brown UCO was 5.15 O2/100 g, 0.94 mg KOH/g, 0.41% (w/w), and 0.79% (w/w) (Suroso, 2013).…”