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All Journal CHEESA: Chemical Engineering Research Articles
Ahmad Fadhilah Ashidiqie
Universitas Jambi
Chemical Engineering, Chemistry & Bioengineering Chemistry

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Coffee Waste as a Potential Adsorbent for Peat Water Treatment Rahma Amalia; Sarah Fiebrina Heraningsih; Oki Alfernando; Sri Mundarti; Muhammad Haviz; Nadia Elvina; Sonia Nizal Putri; Resi Lisma Kinasih; Asmara; Yuzi Chantika Pratama; Ahmad Fadhilah Ashidiqie
CHEESA: Chemical Engineering Research Articles Vol. 8 No. 1 (2025)
Publisher : Universitas PGRI Madiun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25273/cheesa.v8i1.22320.23-34

Abstract

Peat water is characterized by high acidity, turbidity, and poor sensory qualities, which limit its usability. This study evaluated the effectiveness of thermally activated coffee waste adsorbent (CWA) for peat water treatment. CWA was prepared by heating coffee waste at 250°C, followed by washing and drying at 60°C. Batch adsorption experiments were conducted using 1–3 g of CWA in 200 mL of peat water at 30°C, stirred at 150 rpm for 30 minutes. The results revealed significant improvements in water quality: pH increased from 3.85 to 4.62; turbidity was reduced by 99.37% (from 75 to 0.47 NTU); conductivity decreased by 30.7% (from 424 to 294 ?S/cm); and total dissolved solids (TDS) dropped by 93.3% (from 208 to 14 ppm). The Langmuir isotherm model (R² = 0.7297) provided a better fit than the Freundlich model (R² = 0.5845), indicating monolayer adsorption behavior with a maximum capacity of 0.1634 mg/g and a favorable separation factor (RL = 0.0057). Sensory evaluation confirmed enhanced color and odor. These findings support the use of CWA as a sustainable and low-cost adsorbent for improving peat water quality.
Co-Authors Asmara Muhammad Haviz Nadia Elvina Oki Alfernando Rahma Amalia Resi Lisma Kinasih Sarah Fiebrina Heraningsih Sonia Nizal Putri Sri Mundarti Yuzi Chantika Pratama