Adsorpsi Logam Krom (Cr) Total Limbah Cair Batik Menggunakan Karbon Aktif Ampas Kopi
DOI:
https://doi.org/10.36456/waktu.v22i02.8961Keywords:
Adsorpsi, Karbon aktif ampas kopi, Limbah cair batikAbstract
One of the contaminants produced by liquid batik waste is chromium (Cr), which is carcinogenic. The high hydrocarbon and cellulose content in coffee grounds can be used as active carbon to adsorb total Cr in batik liquid waste. This research aims to examine the quality of coffee grounds activated carbon, determine the capacity of coffee grounds activated carbon in reducing Cr levels in batik waste with variations in contact time and adsorbent mass. The variables in this study were the weight of coffee grounds activated carbon of 0.4, 0.8, and 1.2 grams and contact time of 30, 60, 90, 120, and 150 minutes. This research uses a batch system on a laboratory scale. This research shows that coffee grounds activated carbon can adsorb the highest synthetic waste Cr of 96.70%, which occurs at a coffee grounds activated carbon weight of 1.2 g and a contact time of 150 minutes. The Cr metal adsorption process using coffee grounds activated carbon fulfills the Langmuir equation. Coffee grounds activated carbon can adsorb 98.45% Cr from batik waste, the final concentration meets quality standards.
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