Chemical synthesis kinetics and dimensional characterization of nano-lead oxide powder

Authors : Damilola TOPE, Samsudeen AZEEZ, Akeem JIMOH

Pages : 227-236

Doi:10.18596/jotcsa.928341

View : 16 | Download : 10

Publication Date : 2022-02-28

Article Type : Research Paper

Abstract :Systematic chemical decomposition, leaching, desulfurization, reducing and precipitation of spent lead-acid batteries to extract lead in oxide form as a valuable product using organic acid, salt of the acid, and hydrogen peroxide were studied in this present work. Citric acid was found a suitable leachant to dissolve lead. With 1 M citric acid, 2 M sodium citrate, and hydrogen peroxide, 180 min reaction time, solid/liquid ratio of 100 g/L, 30 °C temperature, and 500 rpm speed, > 97% extraction of lead in citrate form was achieved. Leaching kinetics followed 1 – 3insert ignore into journalissuearticles values(1 – X);2/3 + 2 insert ignore into journalissuearticles values(1 – X); = KCt ash diffusion controls dense constant-sized-spherical particles model with an activation energy of 8.3 kJ/mol. The precipitate was calcined at 400 °C to produce α- and β-PbO with a particle size of 19 nm which can be used as a raw material in the production of a new lead-acid battery.
Keywords : Leaching, kinetic study, Leaching models, Nanoparticles