F.R. Mufakhir, I.A. Yuliamsa, A. Juniarsih, W. Astuti, S. Sumardi, A.S. Handoko, Sudibyo, F.C. Alam, L.O. Arham, V. Poernomo, H.T.B.M. Petrus
Liquid waste from spent-battery recycling contains heavy metals that are harmful to the environment. This study aimed to eliminate the dissolved cobalt, cadmium, nickel, manganese, mercury, and arsenic in the liquid waste. A combination of the chelation method and electrocoagulation method using monopole parallel circuit with aluminum electrodes was tested. The influence of specific chelating agents (citric acid and chitosan) concentration and contact time on the removal efficiency were investigated. Electrical energy consumption and the specific number of dissolved electrodes were calculated from the optimum condition. The method with the chelation followed by electrocoagulation gave the best result than the other way around. The best removal efficiency for all elements was above 99.5% using chitosan at a concentration of 6 g/L, a current density of 25 A/m2, and a contact time of 30 minutes. Energy consumption and dissolved electrodes were 0.0429 kWh/m3 and 0.4074 g, respectively. The output of this method meets the Indonesian water quality standard and can be a novel wastewater treatment technology. © Published under licence by IOP Publishing Ltd.
Research Unit for Mineral Technology, Indonesian Institute Of Sciences, Jl. Ir. Sutami KM. 15 Tanjung Bintang, South Lampung, Indonesia; Department Metallurgy Engineering, Universitas Sultan Ageng Tirtayasa, Jl. Jend. Sudirman Km 3, Kotabumi Purwakarta, Banten, Cilegon, 42435, Indonesia; Department Production And Industry Technology, Institut Teknologi Sumatera, Jl. Terusan Ryacudu, Way Huwi, Jati Agung, South Lampung, 35365, Indonesia; PT. Limas Primenergi Lestari, Raya Bangsalsari Trisnogambar, Jember, East Java, Indonesia; Department Chemical Engineering, Universitas Gajah Mada, Senolowo, Sinduadi, Mlati, Sleman Regency, Yogyakarta, 55284, Indonesia