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All Journal Jurnal Zarah IJCR (Indonesian Journal of Chemical Research) Jurnal Kimia Unand
Safni
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Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Education Energy Materials Science & Nanotechnology

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THE POTENTIAL OF PALM SHELL ACTIVATED CARBON AS AN ADSORBENT FOR HEAVY METALS IN THE RECYCLING PROCESS OF USED LUBRICATING OIL Zilfa, Zilfa; Safni; Amanda, Selya
INDONESIAN JOURNAL OF CHEMICAL RESEARCH Vol. 9 No. 1 (2024): Volume 9, ISSUE 1,2024
Publisher : Chemistry Department, Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/ijcr.vol9.iss1.art3

Abstract

With the increasing industrial and transportation activities, the demand for lubricating oil is increasing every year. Lubricating oil is used to reduce friction and wear on frictional engine components. Over time, lubricating oil becomes inefficient and needs to be replaced with new oil. To enhance the efficiency of petroleum use and reduce environmental pollution, used lubricants need to be recycled. One method of improving the quality of used lubricants is by absorbing heavy metal contaminants using activated carbon from palm kernel shells. The efficiency of activated carbon adsorption as an adsorbent for heavy metals in used lubricants was observed by varying the adsorption parameters of contact time, adsorbent mass, and sample volume. In this study, the absorption of several heavy metals, including iron (Fe), lead (Pb), and zinc (Zn), was investigated. Analysis of the absorption results was performed using AAS, FTIR, XRD, and XRF. The results showed that the absorption of metals in used lubricants using activated carbon from palm kernel shells with optimum parameters can absorb 90% of Fe, Pb, and Zn metals. The optimum contact time for each metal adsorption was 3 hours, with an adsorbent mass of 0.75 grams and a sample volume of 5 mL. Analysis of used lubricants before and after adsorption using FTIR indicated a shift in wave numbers, indicating an adsorption process.
Degradation of Remazol Yellow FG by Sonolysis and Photolysis with TiO2/Active Carbon Rice Husk (TiO2/AC) Catalyst and Analysis Using Spectrophotometer UV-Vis Safni; Putri, Anggi Nabila; Deswati, Deswati; Zilfa, Zilfa
Jurnal Kimia Unand Vol. 13 No. 2 (2024): November 2024
Publisher : Departemen Kimia Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jku.13.2.34-40.2024

Abstract

Remazol Yellow FG is one of the dyes that are often used in the textile industry because it is accessible and reasonably priced. The non-biodegradable dyes produce waste and inhibit sunlight from passing through the water. In this study, we performed Fourier Transform Infrared (FTIR) to characterise the activated carbon of rice husk and TiO2/activated carbon rice husk (TiO2/AC) using Diffuse Reflectance Spectroscopy UV-Vis (DRS UV-Vis). Remazol Yellow FG was degraded by using sonolysis and photolysis under UV ray (λ = 254 and 365 nm) and visible ray. We performed the experiments using a variety of variables which consist of catalyst dosage (10–50 mg), contact time (1–6 hours), catalyst type (AC, TiO2 and TiO2/AC), lamp type (365 nm, 254 nm and visible lamp) and initial Remazol Yellow FG concentration (10–30 mg/L) to determine the degradation percentage. We found that the addition of TiO2/AC catalyst increased the degradation percentage of Remazol Yellow FG from 6,86% to 52,62% using sonolysis and 8,34% to 95,02% using photolysis. Hence, we concluded that TiO2/AC catalyst from rice husk could be an effective catalyst for the Remazol Yellow FG degradation.
Influence of Calsination Temperature on Zeolite Synthesis from Non-Hazardous Wastes and Its Application as an Adsorbent of Mn Metal Ion Septiani, Upita; Syukri; Mia Yeliandri; Safni; Zilfa
Jurnal Kimia Unand Vol. 14 No. 1 (2025): May 2025
Publisher : Departemen Kimia Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jku.14.1.29-35.2025

Abstract

In this research, zeolite material was synthesized by hydrothermal method using non- hazardou waste of fly ash as the raw material at low crystallization temperatures of 70oC with seawater as solvent. The effect of calsination temperature on synthesis of zeolite was studied, and the ability of synthesized zeolite to adsorb Mn metal ion in aqueous solution was also investigated. The synthesized zeolite was characterized by Fourier Transform Infra-Red (FT-IR), X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM-EDS), and Surface Area Analyzer (SAA). Based on the results of XRD, the type of zeolites produced from the synthesized zeolite are zeolite X and sodalite. The synthesized zeolite was then tested for the adsorption of Mn metal ion, using atomic absorption spectrophotometer (AAS) and it was found that the zeolite material synthesized calcined 550oC had the highest adsorption capacity compared to other synthesized zeolite materials, where the maximum adsorption was 192,31 mg/g.
PENGARUH DEGRADASI PELUMAS BEKAS MENGGUNAKAN TiO2/ZEOLIT TERHADAP KANDUNGAN Mg DAN Na SECARA FOTOLISIS Zilfa; Safni; Desra Welly
Jurnal Zarah Vol. 13 No. 2 (2025): Jurnal Zarah
Publisher : Fakultas Keguruan dan Ilmu Pendidikan, Universitas Maritim Raja Ali Haji

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Used lubricants are one of the wastes included in B3 waste, used lubricants contain heavy metals that can pollute the environment and are harmful to living things. Used lubricants contain metals, namely Pb, Zn, Ca, Ba, Na and Mg which can damage vehicle engines. The application of the photolysis method using TiO2/Zeolite catalysts can degrade Mg and Na metals in used lubricants. This study aims to determine the effect of using TiO2/Zeolite catalysts on the degradation of used lubricants by the photolysis method. Analysis of Mg and Na metal content in used lubricants was measured using an Atomic Absorption Spectrophotometer (AAS). Analysis of used lubricants before and after adsorption with Fourier Transform Infrared (FTIR). Characterization of TiO2/Zeolite before and after degradation using X-Ray Diffraction (XRD). The research obtained the optimum conditions for the degradation of Mg and Na metals in used lubricants, namely the optimum degradation time for Mg and Na metals is 15 minutes, the optimum amount of catalyst for degradation for Mg and Na metals is 0.4 grams, and the optimum volume of used lubricant for the degradation of Mg and Na metals is 10 mL with a large percentage of degradation of 83.37% Mg and 74.98% Na. Characterization of TiO2/Zeolite using XRD showed no change in the structure of TiO2/Zeolite. Based on these data, it can be said that the TiO2 catalyst supported by zeolite can be used to degrade Mg and Na metals in used lubricants. Characterization of used lubricants using FTIR showed a shift in wave numbers before and after degradation which indicated a degradation process.   Pelumas bekas merupakan salah satu limbah yang termasuk dalam limbah B3, pelumas bekas mengandung logam berat yang dapat mencemari lingkungan dan berbahaya bagi makhluk hidup. Pelumas bekas mengandung logam yaitu Pb, Zn, Ca, Ba, Na dan Mg yang dapat merusak mesin kendaraan. Penerapan metode fotolisis dengan menggunakan katalis TiO2/Zeolit dapat mendegradasi logam Mg dan Na pada pelumas bekas. Penelitian ini bertujuan untuk mengetahui pengaruh penggunaan katalis TiO2/Zeolit terhadap degradasi pelumas bekas dengan metode fotolisis. Analisis kandungan logam Mg dan Na pada pelumas bekas diukur dengan menggunakan alat Spektrofotometer Serapan Atom (AAS). Analisis pelumas bekas sebelum dan sesudah adsorpsi dengan Fourier Transform Infrared (FTIR). Karakterisasi TiO2/Zeolit sebelum dan sesudah degradasi menggunakan X-Ray Diffraction (XRD). Dari penelitian ini diperoleh kondisi optimum untuk degradasi logam Mg dan Na pada pelumas bekas, yaitu waktu degradasi optimum untuk logam Mg dan Na adalah 15 menit, jumlah katalis optimum untuk degradasi logam Mg dan Na adalah 0,4 gram, dan volume pelumas bekas yang optimum untuk degradasi logam Mg dan Na adalah 10 mL dengan besar persen degradasi 83,37% Mg dan 74,98% Na. Karakterisasi TiO2/Zeolit dengan menggunakan XRD menunjukkan tidak adanya perubahan struktur TiO2/Zeolit. Berdasarkan data tersebut dapat dikatakan bahwa katalis TiO2 yang didukung oleh zeolit dapat digunakan untuk mendegradasi logam Mg dan Na pada pelumas bekas. Karakterisasi pelumas bekas menggunakan FTIR menunjukkan adanya pergeseran bilangan gelombang sebelum dan sesudah degradasi yang mengindikasikan adanya proses degradasi.
Co-Authors Amanda, Selya Desra Welly Deswati Deswati Mia Yeliandri Putri, Anggi Nabila Syukri Upita Septiani Zilfa Zilfa