Abstract
Chromium absorption using modified zeolites in the form of mono-cation (H-Zeolite) was carried out. Modifications are intended to increase the ability of ion exchange. Modifications made were chemical activation by adding ammonium chloride solution and physically by calcination. Zeolite used came from Kasongan, while as an activity test liquid waste from the electro plating industry PT. Mega Andalan Electro Plating. The parameter used for this study is the comparison of zeolite mass with waste samples. Comparisons used are 1: 5, 1: 7, 1:10, 1:20 and 1:50. From the results of the study it can be seen that there is an increase in the ability of ion exchange in the modified zeolite and produces an optimum ratio of 1: 7 with an absorption efficiency of 13.44%..
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