Pemanfaatan limbah kaleng sebagai bahan dasar koagulan berbasis aluminium

Abstract

Wastes of canned drink were found abundantly in the environment. Utilization of this waste can increase the value of the waste. This type of can has been tested previously and showed the aluminum contents of 1.41–16.04%. The aluminium content indicates its potential to be used as raw material for aluminum-based coagulant. The synthesis method used for producing coagulant was partial hydrolysis using HCl 33% with various polymerization times of 24 and 48 hours and components of 5 and 10%, giving 4 kinds of synthetic coagulant. The synthetic coagulants characterized based on SNI 06-3822-1995 showed that the results did not meet the requirements of SNI-quality. The peaks of infrared absorption on the synthetic coagulants were 3518.16, 1631.78, and 1168.86 cm-1 and almost resemble the commercial polyaluminium chloride which are 3452.58, 1627.92, and 3070.68 cm-1. Performance test of the coagulant on some textile industry wastewater had been tested at pH 6, 7, 8, and 9. The most effective performance from each coagulant was shown at pH 9. Coagulation of the waste cans made by partial hydrolysis method using HCl was able to reduce turbidity of more than 95%.