Wiharti
APLIKASI METODE ELEKTROLISIS MENGGUNAKAN ELEKTRODA PLATINA (Pt), TEMBAGA (Cu) DAN KARBON (C) UNTUK PENURUNAN KADAR Cr DALAM LIMBAH CAIR INDUSTRI PENYAMAKAN KULIT DI DESA SITIMULYO, PIYUNGAN, BANTUL, YOGYAKARTA
Wiharti, Riyanto dan Noor Fitri
Jurusan Ilmu Kimia, FMIPA, Universitas Islam Indonesia, Yogyakarta
Email : [email protected]
Email : [email protected]
ABSTRACT
Has done research on reduction of Cr in tannery wastewater using electrolysis method. Electrolysis process is done with the initial pH 0.5 by addition of H2SO4 95-97%. Electrolysis is done with a variety of types of electrode, voltage and electrolysis time. Voltage that is used by 5, 10, 15 and 20V, while the electrolysis time used is 1, 2, 3, 4, and 5 hours and the type of electrodes used is Cu-Pt, Cu-Cu and Cu-C. Electrolysis resulting solution was analyzed using AAS (Atomic Absorption Spectroscopy).
The results showed that the % decrease in Cr concentration is highest at the Cu-Cu electrodes with a time of 2 hours and a 15V voltage is equal to 71.73% while for the Cu-C at the time of 3 hours and a voltage of 10V % reduction of Cr by 58.64%. And for the Cu-Pt electrodes at 2 hours and voltage 20V % reduction of Cr by 49.63%.
The results showed that the % decrease in Cr concentration is highest at the Cu-Cu electrodes with a time of 2 hours and a 15V voltage is equal to 71.73% while for the Cu-C at the time of 3 hours and a voltage of 10V % reduction of Cr by 58.64%. And for the Cu-Pt electrodes at 2 hours and voltage 20V % reduction of Cr by 49.63%.
Keywords: Electrolysis, Copper, Platinum, Carbon, Cr and Tannery industrial wastewater.
