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All Journal Indonesian Journal of Chemistry
Faiza, Putri Iis
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Chemical Engineering, Chemistry & Bioengineering Chemistry

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Regeneration of Spent Bleaching Earth by Calcination and Its Morphological Enhancement via KOH Impregnation Nugraheni, Ika Kusuma; Jaya, Jaka Darma; Nuryati, Nuryati; Sunardi, Sunardi; Irawati, Utami; Faiza, Putri Iis; Saputra, Dita Adi
Indonesian Journal of Chemistry Vol 26, No 1 (2026)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.99600

Abstract

Spent bleaching earth (SBE), a waste generated from palm oil bleaching, contains residual oil and organic matter that block its pore structure and pose environmental disposal concerns. Regeneration of SBE is therefore essential to enable its reutilization. In this study, SBE was regenerated by calcination and further modified via KOH impregnation at concentrations of 1.00, 0.10, and 0.01 M. The regenerated materials were characterized using XRF, SEM, TEM, XRD, and BET surface area analysis. Calcination combined with 0.10 M KOH impregnation increased the surface area from 8.70 to 93.81 m2/g, approaching the value of activated bleaching earth (94.29 m2/g), and significantly altered pore volume and pore size distribution. These findings indicate that calcination restores the basic structure of SBE, while subsequent KOH impregnation enhances its morphological properties, highlighting the potential of regenerated SBE as a low-cost adsorbent or catalyst support.
Co-Authors Jaka Darma Jaya Nugraheni, Ika Kusuma Nuryati Nuryati Saputra, Dita Adi Sunardi Sunardi Utami Irawati