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All Journal Al-Kimia Indonesian Journal of Pure and Applied Chemistry
Sihotang, Andreas
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Biochemistry, Genetics & Molecular Biology Chemistry

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The Effect of Metal Impregnation Of Fe Cu And Co on Surface Area of ZSM-5 Catalyst Analyzed Using Surface Area Analyzer (AAS) Sihotang, Andreas; Is Heriyanti, Septina; Djangkung Sumbogo Murti, Sri; Mirda Yanti, Fusia; Farizt Ichsan, Ahmad; Adiningtyas Putri, Alya; Riski Gusti, Diah
Al-Kimia Vol 10 No 2 (2022): DECEMBER
Publisher : Study Program of Chemistry - Alauddin State Islamic University of Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/al-kimia.v10i2.32912

Abstract

The number of watercrafts in the sea will have an impact on the amount of waste lubricant oil that is discharged into the sea, which ultimately results in pollution. The increasing level of hazardous and toxic materials (B3 waste) is concerned to have a wider impact on public health and environment quality. One of the B3 wastes that requires special handling due to its high quantities is used lubricating oil. Utilization and processing of waste lubricant oil discharged from the ship is an alternative that can be applied to reach efficient consumption of petroleum which is shrinking from year to year. Therefore, we need a processing method that can reduce the pollutants generated from the waste, one of which is the Acid Clay Treatment method. This treatment aims to determine the best conditions for reducing heave metal lead (Pb) through Acid Clay Treatment method and to assess the decrease in Pb concentration contained in used lubricating oil from ship. The adsorbent used was clay that has been activated with sulphuric acid. The processing of used lubricating oil was carried out using three variations, including adsorbent concentration, contact time, and acidity (pH). The test results of used oil lubricating oil processing were 15 gram of adsorbent concentration, 90 minutes of contact time, and pH 4. The Pb reduction efficiency obtained from Acid Clay Treatment method in the best conditions was 53.72%.
EDIBLE FILM BERBASIS PULP KAKAO (Theobroma cacao L.) DAN KULIT BUAH SEMANGKA (Citrullus lanatus) SEBAGAI TEKNOLOGI FOOD PACKAGING Reski, Alpi Meitia; Patricia, Anggun Dwi; Azira, Ayu; Sihotang, Andreas; Tarigan, Indra Lasmana
Indonesian Journal of Pure and Applied Chemistry Vol 7, No 3 (2024)
Publisher : Tanjungpura University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/indonesian.v7i3.75567

Abstract

This study evaluated the physical characteristics (thickness and surface morphology) and chemical properties (composition and functional groups) of edible films made from cocoa pulp and watermelon rind. Additionally, it investigated the effect of citrulline concentration on the solubility of the film and its impact on extending the shelf life of Jambi potato dodol. The experimental data were statistically analyzed using analysis of variance (ANOVA) to determine the significance of differences among treatments. The citrulline concentration variation factor consisted of two concentration levels, namely 5% and 15%. The results showed that the thickness of the edible film was 0.26 mm for the film containing 5% citrulline and 0.16 mm for the film with 15% citrulline. The viscosity of the film-forming solution influenced the surface morphology of the edible film. A chemical characteristics test was carried out using FTIR analysis, which showed the presence of several different functional groups at various wave numbers. Dodol packaged with edible film demonstrated a relatively good shelf life against microbial growth. The most effective edible film in enhancing resistance to bacterial contamination was the one containing 15% citrullin.
Co-Authors Adiningtyas Putri, Alya Azira, Ayu Diah Riski Gusti Djangkung Sumbogo Murti, Sri Farizt Ichsan, Ahmad Indra Lasmana Tarigan Is Heriyanti, Septina Mirda Yanti, Fusia Patricia, Anggun Dwi Reski, Alpi Meitia