Abstract:
Electrocoagulation is a method that has been successfully used for the treatment
of metal plating waste. The principle of the electrocoagulation method is based on
oxidation and reduction reactions. This study used variations in voltage, length of
time for electrocoagulation and speed of stirring in electroplating wastewater
treatment. Based on the results of the study, The voltage of 10 volts has a
chromium metal content value of 1.9 mg/L with a metal reduction percentage of
70.31%. The electrocoagulation time of 240 minutes has a chromium metal
content of 0.033 mg/L with a metal reduction percentage of 99.48%. The stirring
speed of 150 rpm has a chromium content of 0.1 mg/L with a metal reduction
percentage of 98.43%. The stirring speed of 150 rpm has a large agglomerate
morphology. The results of elemental analysis using Energy Dispersive X-Ray
(EDS) showed that the flocculant contained an elemental carbon (C) of 5.17%.
The elemental content of oxygen (O) is 50.95%. The elemental content of
aluminum(Al) is 28.78%. The elemental content of chromium (Cr) is 12.15%..
