Claim Missing Document
Check
Articles

Found 3 Documents
Search
Journal : MASALIQ: Jurnal Pendidikan dan Sains

Pemanfaatan Karbon Aktif Daun Serai (Cymbopogon citratus) dan Bleaching Earth dalam Penjernihan Minyak Jelantah Yanti, Fetria Rahayu Wendi; Nizar, Umar Kalmar
MASALIQ Vol 5 No 3 (2025): MEI
Publisher : Lembaga Yasin AlSys

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58578/masaliq.v5i3.6036

Abstract

Used cooking oil is a household waste with the potential to pollute the environment and pose health risks if discarded improperly or reused without adequate treatment. This study aims to purify used cooking oil through a two-stage adsorption method using activated carbon derived from lemongrass leaves and Bleaching Earth. In the first stage, activated carbon was synthesized from lemongrass leaves calcined for 60 minutes and activated with 2N NaOH solution, followed by the addition of Bleaching Earth in the second stage. The quality of the oil before and after purification was assessed through analyses of density, acid number, saponification value, moisture content, and infrared spectrum (FTIR). The results indicate that activated carbon calcined for 60 minutes (MJ-C60) yielded the best outcome, reducing density to 0.9414 g/mL, lowering moisture content from 0.34% to 0.16%, and increasing the saponification value from 41.5650 to 63.7075 mg KOH/g. The acid number also decreased from 13.2302 to 8.3288 mg KOH/g. FTIR analysis revealed the presence of ester C=O groups around 1743 cm⁻¹ and aliphatic C–H absorption bands at 2850–2950 cm⁻¹, indicating that the triglyceride structure remained intact. These findings demonstrate that the combination of activated carbon from lemongrass leaves and Bleaching Earth is effective in improving the clarity and physicochemical quality of used cooking oil, while offering an environmentally friendly solution based on organic waste utilization.
Peningkatan Pemurnian Minyak Jelantah melalui Sistem Adsorben Ganda: Bleaching Earth dan Karbon dari Kulit Buah Kakao (Theobroma cacao L) Utami, Esssylia Afriyanti; Nizar, Umar Kalmar; Etika, Sri Benti
MASALIQ Vol 5 No 3 (2025): MEI
Publisher : Lembaga Yasin AlSys

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58578/masaliq.v5i3.6039

Abstract

Used cooking oil (minyak jelantah) is a household and industrial waste product that poses environmental risks and undergoes significant quality degradation due to the breakdown of chemical compounds during repeated use. This study aims to evaluate the effectiveness of a combination of activated carbon derived from cocoa pod husk waste and bleaching earth in improving the quality of used cooking oil. The research was conducted experimentally in the laboratory of Universitas Negeri Padang using used cooking oil obtained from local vendors. Activated carbon was prepared by calcining cocoa pod husks at 350°C for varying durations of 30, 45, 60, and 75 minutes, followed by activation with 1M NaOH solution. The purification process was carried out in stages through the addition of activated carbon and bleaching earth under controlled heating conditions. Parameters analyzed included acid number, moisture content, density, saponification value, and functional group characterization using infrared spectroscopy (FTIR). The results indicate that the most effective adsorbent combination was achieved with activated carbon calcined for 60 minutes, which reduced the acid number from 14.92 to 5.09 mg KOH/g, decreased moisture content to 0.11%, and increased the saponification value to 75.30 mg KOH/g. The FTIR spectrum showed reduced intensity in functional groups associated with degradation, indicating effective purification. In conclusion, the combination of activated carbon from cocoa pod husk waste and bleaching earth is proven effective in improving the physicochemical quality of used cooking oil, while also demonstrating the potential for sustainable and environmentally friendly use of agricultural waste as raw material for adsorbents.
Optimasi Waktu Kalsinasi Karbon Aktif dari Bunga Cemara Laut (Casuarina equisetifolia) dalam Kombinasi dengan Bleaching Earth untuk Pemurnian Minyak Jelantah Fadila, Radhiatul; Nizar, Umar Kalmar
MASALIQ Vol 5 No 3 (2025): MEI
Publisher : Lembaga Yasin AlSys

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58578/masaliq.v5i3.6040

Abstract

Used cooking oil is a byproduct of repeated frying processes that undergoes quality degradation due to continuous oxidation and heating, resulting in harmful compounds such as free fatty acids, peroxides, and polymers. This study aims to evaluate the effectiveness of purifying used cooking oil using a combination of two adsorbents: activated carbon derived from Casuarina equisetifolia (beach she-oak) flowers activated with NaOH, and bleaching earth. Activated carbon was synthesized through calcination at varying durations of 45, 60, 75, and 90 minutes to determine the optimal condition. The oil quality was evaluated by measuring acid number, saponification value, density, moisture content, and functional group analysis using infrared spectroscopy (FTIR). The results indicate that activated carbon calcined for 60 minutes produced the best outcomes, reducing the acid number from 14.92 to 5.07 mg KOH/g, increasing the saponification value to 43.33 mg KOH/g, achieving a density of 0.8693 g/mL in accordance with national standards (SNI), and reducing moisture content to 0.4330%. FTIR analysis showed decreased intensity in carbonyl groups and the disappearance of hydroxyl groups, indicating effective removal of polarized and oxidized compounds. These findings demonstrate that the combination of activated carbon from Casuarina equisetifolia flowers and bleaching earth is an effective and environmentally friendly purification method, supporting the sustainable use of biomass waste as adsorbent material.