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Zilfa, Z.
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Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Energy Materials Science & Nanotechnology

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Penggunaan Zeolit sebagai Adsorben untuk Penjernihan Air Sumur terhadap Kandungan Logam Fe, Nilai BOD, COD, dan TSS di Kelurahan Kampuang Jua Nan XX, Kecamatan Lubuk Begalung, Kota Padang Zilfa, Z.; Yusuf, Yulizar; Syahputra, Dian
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.13.2.24-33.2024

Abstract

Nobita Hill is an area that will be used as a tourist destination located in Kampung Jua Nan XX Village, at the foot of Nobita Hill, precisely in RW III, there are many houses with poor well water quality. The purpose of this study is to determine the use of zeolite (adsorbent) to purify well water based on Fe metal content parameters, BOD, COD, TSS values and also to determine the effect of adsorbent mass, sample volume, contact time and stirring time on the adsorption process. Determination of Fe content using atomic absorption spectrophotometry (AAS). Determination of the value of Biological Oxygen Demand (BOD) using the Iodometric titration method, determining the value of Chemical Oxygen Demand (COD) using the visible spectrophotometric method and determining the value of Total Suspended Solids (TSS) using the gravimetric method. Zeolite was characterized by X-Ray Fluorescence (XRF) before and after adsorption. Analysis of the concentration of Fe in well water before adsorption 2.1 mg/L. 40 mL of well water was adsorbed with 0.1 g of zeolite for 45 minutes at a stirring speed of 200 rpm, Fe decreased by 96.1%, from 2.1 mg/L to 0.1 mg/L. COD, BOD and TSS values also decreased 57.1%, 63.9% and 67.5% respectively. Characterization using XRF showed a decrease in Si and Al content and an increase in Fe metal content in the adsorbent after adsorption.
PEMANFAATAN ZnO/ZEOLIT UNTUK DEGRADASI AIR GAMBUT MENGGUNAKAN METODE OZONOLISIS DAN PENGARUH TERHADAP KADAR BESI Zilfa, Z.; Yulizar Yusuf; Joya Patricia Ambri
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.14.1.17-23.2025

Abstract

Peat water is one of the surface water sources that is difficult to utilize because it has poor quality with high Organic content (Humic Acid and Fulvic Acid), and Inorganic such as Iron. The application of the Advanced Oxidation Process (AOP) method using an ozone generator can be used in the degradation of peat water, to obtain effective degradation results, a ZnO/Zeolite catalyst is added. This study aims to determine the effect of ZnO/Zeolite catalyst utilization on peat water degradation by Ozonolysis method on Fe, COD, BOD, Nitrite, and Nitrate levels, and TSS values. The parameters tested included determining the optimum conditions for peat water degradation on Fe. The results obtained from the degradation process with ozone is for 15 minutes using ZnO/Zeolite as much as 0.2 grams, peat water sample volume of 20 mL. After the degradation process was carried out at optimum conditions, the Fe content was found to be 0.11 mg/L. The results of the test parameters were within the limits of the quality standards used. Based on these data, it can be said that the decrease in Fe metal concentration values in peat water by ozonolysis is more effective with the addition of ZnO/zeolite catalyst at optimum conditions.
Modifikasi Keramik Kerajinan Rakyat dengan Penambahan CaSO4, Pasir Besi, Abu Sekam Padi, dan Batu Kapur Zilfa, Z.; Vivi Sisca
Jurnal Kimia Unand Vol. 12 No. 1 (2023): May 2023
Publisher : Departemen Kimia Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jku.12.1.19-25.2023

Abstract

One of the ceramic home industries is ceramic making in Galogadang Batusangkar. This home industry uses the basic ingredients of clay mixed with water and then molded and burned, so the resulting ceramic products are less than perfect, hard, and brittle. According to the matter above, we wish to try to look for methods and modify the ceramics home industry by adding some clay that turns yellow and white, sulfate calcium (CaSO4), limestone, iron sand, and chaff ash. The process of ceramic consists of three phases that are pressing powder, drying, and burning. The analysis carried out is the compressive strength test, and SEM (Scanning Electron Microscopy) aims to observe the uniformity of the mixture of the ceramic. XRD (X-Ray Diffraction) determination was done to determine the crystal structure. The component analysis was measured with XRF (X-Ray fluorescence). From the research result, white clay is nicely made by ceramic materials if mixed with sulfate calcium (CaSO4), limestone, iron sand, and chaff ash.
Penggunaan ZnO/Zeolit dalam Degradasi Fenol Secara Fotolisis dan Aplikasinya Pada Limbah Karet Zilfa, Z.; Wilda Putri Suhada; Rahmiana Zein
Jurnal Kimia Unand Vol. 12 No. 2 (2023): November 2023
Publisher : Departemen Kimia Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jku.12.2.19-26.2023

Abstract

Phenol is one of the organic compounds that are toxic and carcinogenic. In this study ZnO/zeolite was used to degrade phenol by photolysis and its application to rubber waste. Phenol analysis was performed using a UV-Vis spectrophotometer and Fourier Transform Infrared (FTIR), while the ZnO/zeolite characterization used FTIR and X-Ray Diffraction (XRD). The results showed that the percentage of phenol degradation without a catalyst was 15.79% with UV irradiation for 75 minutes and increased to 79.63% with the addition of 0.4 g ZnO/zeolite. Phenol degradation in rubber wastewater samples using ZnO/zeolite obtained a degradation percentage of 58.28%. Phenol analysis before and after degradation showed a shift in wave number which indicated the occurrence of degradation. Characterization of ZnO/zeolite before and after degradation using FTIR and XRD showed that there was no change in the structure of ZnO/zeolite
Penanggulangan Limbah Ubi Kayu dengan Menggunakan Katalis TiO2/Zeolit Alam Clinoptilolit-Ca secara Sinergi Fotokatalis dan Adsorpsi Zilfa, Z.; Yusuf, Yulizar; Putri, Alsa Sepia
Jurnal Kimia Unand Vol. 13 No. 1 (2024): May 2024
Publisher : Departemen Kimia Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jku.13.1.14-21.2024

Abstract

Cassava waste containing cyanogenic glycosides is very dangerous for the environment because there is cyanide bound to organic compounds. Cyanide bound to organic compounds is degraded by photolysis using TiO2 catalyst/Clinoptilolite-Ca natural zeolite to break the bond between HCN and organic compounds so that it is no longer harmful to the environment, besides that cassava waste also contains suspended solids and organic compounds that affect water quality, resulting in high COD, BOD, TOC, and TSS values in waters. Therefore, the values of COD, BOD, TOC, and TSS were determined before and after degradation. In addition, the effect of time, mass, and type of catalyst (TiO2, Zeolite, and TiO2/Zeolite) on the percentage of cassava waste degradation was also determined. CN- analysis was performed with a UV-VIS spectrophotometer, where maximum absorption occurred at a wavelength of 573 nm. The optimum time of degradation without catalyst is 75 minutes with a degradation percentage of 20.52%, the optimum mass of TiO2/Zeolite catalyst is 0.8 grams with a degradation percentage of 79.97% at 60 minutes, the percentage of degradation using 0.03 grams of TiO2 is 58.65% at 75 minutes, the percentage of degradation using 0.77 zeolite is 35.43% at 75 minutes. COD value before degradation 1406 mg/L and after degradation 465 mg/L. BOD value before degradation 226 mg/L and after degradation 95.4 mg/L. TSS value before degradation 400 mg/L and after degradation 220 mg/L. While the TOC value before degradation was 546 mg/L and after degradation was 670 mg/L. FTIR analysis of cassava waste shows a peak shift indicating degradation, the 750-1000 cm-1 and 1250-1500 cm-1. While the characterization of the TiO2/zeolite catalyst in FTIR and XRD showed no change in the structure of the TiO2/zeolite catalyst before and after degradation.    
Pengaruh Degradasi Pelumas Bekas Menggunakan Katalis Zno/Zeolit terhadap Kandungan Mg dan Na secara Fotolisis Zilfa, Z.; Yusuf, Yulizar; Hanifah Adhisa
Jurnal Kimia Unand Vol. 14 No. 2 (2025): November 2025
Publisher : Departemen Kimia Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jku.14.2.15-24.2025

Abstract

Every year the number of car users has increased significantly, leading to an increase in used lubricant waste. Used lubricants are the result of oil that has been subjected to engine friction, combustion residue and dust. As a result, the effectiveness of the lubricant decreases, and if left for a long time, these contaminants can turn into harmful abrasive particles. The purpose of this study is to see the effect of using ZnO/Zeolite catalysts in degrading used lubricants on the reduction of Mg and Na content by photolysis. Analysis of Mg and Na metal content in used lubricants was carried out using Atomic Absorption Spectrophotometry (AAS). The results of this study showed that the degradation process through photolysis lasted for 15 minutes with the utilization of 0.4 grams of ZnO/Zeolite, and the volume of used lubricant samples was 10 mL for Mg and Na metals. After the degradation process was carried out under optimal conditions, the percentage of metal degradation of Mg reached 84.407% and Na 78.155%. Analysis of used lubricants before and after the degradation process was carried out using FTIR and UV-Vis Spectrophotometer, which showed a change in the spectrum, characterized by a shift in wave numbers, which indicated that the degradation had been successfully carried out. The results of catalyst characterization using FTIR and XRD showed that there was no change in the structure of ZnO/zeolite.
Co-Authors Hanifah Adhisa Joya Patricia Ambri Putri, Alsa Sepia Rahmiana Zein Syahputra, Dian Vivi Sisca Wilda Putri Suhada Yulizar Yusuf Yulizar Yusuf