![]() ![]() After that the mixture is filtered and the total chrome metal is analyzed. Then the stirring process is carried out with a speed of 150 rpm with a contact time of 30, 60 and 90 minutes. Furthermore, peanut shells used as biosorbents are weighed as much as 1, 2, 3, 4 and 5% of the weight of industrial liquid waste that has been determined. Then peanut shells are activated using H2SO4 0.05 M. The aim of this study was to determine the effect of peanut shell activation, biosorbent weight, and contact time for chromium metal removal. The metal coating industry produces waste water containing chromium metal in concentrations large enough so that it will be dangerous if disposed of directly without being processed first.
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