Study of Lignosulfonate Electrocoagulation with Aluminium Plate Electrode

• Main Author: Mayaperdana, Realita
• Format: Final Project
• Language: Indonesia
• Subjects: Kimia
• Online Access: https://digilib.itb.ac.id/gdl/view/38074
• Institution: Institut Teknologi Bandung

Lignosulfonate (SLS) is a derivative of lignin compounds obtained as a by-product sulfite process in the paper industry. These compounds resulting brownish-black water and smells that can pollute the environment. One method that can be used for the removal of these compounds from wastewater is a method of electrocoagulation. This method is based on the principle of a colloid coagulation using electrical current. In this research, electrocoagulation using aluminum plate electrodes with surface size used is 4 cm x 1 cm. Parameters studied include current density, time, initial concentration of lignosulfonate, the addition of supporting electrolyte concentration in the form of NaCl and CaCl2, and the initial pH of the solution. Lignosulfonate concentration in the solution before and after electrocoagulation process was measured by UV-Vis spectrophotometry at a wavelength of 281 nm, while the sludge produced in the electrolysis process were analyzed using an infrared spectrophotometry and SEM-EDX. The results were obtained optimum current density for electrocoagulation is 60 A/m2, electrocoagulation optimum time is 45 minutes, the optimum concentration of NaCl and CaCl2 used as a supporting electrolyte respectively is 0.26 M and 0.20 M, the initial pH optimum solution obtained at pH 4 and pH 10. The smaller LS concentration in the solution, the more effective electrocoagulation process can be conduct.