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All Journal VALENSI JURNAL KIMIA SAINS DAN APLIKASI Jurnal Natur Indonesia Jurnal Riset Kimia Jurnal Litbang Industri Jurnal Zarah Chimica et Natura Acta Indonesian Journal of Chemistry Akta Kimia Indonesia Jurnal Ecolab Warta Pengabdian Andalas: Jurnal Ilmiah Pengembangan Dan Penerapan Ipteks REACTOR : Journal of Research On Chemistry And Engineering IJCR (Indonesian Journal of Chemical Research) International Journal of Humanities Education and Social Sciences Jurnal Litbang Industri Journal Of Research and Education Chemistry (JREC) Jurnal Katalisator Vitalitas Medis : Jurnal Kesehatan Dan Kedokteran Inovasi Kesehatan Global Jurnal Kimia Unand
Zilfa Zilfa
Andalas University
Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Economics, Econometrics & Finance Education Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Medicine & Pharmacology Nursing Public Health Social Sciences Other

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Penentuan Kadar Residu Pestisida Klorpirifos dan Pengaruh Pencucian pada Cabai, Buncis dan Sawi Putih serta Nilai Risiko Kesehatan pada Manusia Zilfa Zilfa; Yulizar Yusuf; Mitha Anggreini Putri; Fheiza Heysha
Inovasi Kesehatan Global Vol. 3 No. 2 (2026): Mei : Inovasi Kesehatan Global
Publisher : Lembaga Pengembangan Kinerja Dosen

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62383/ikg.v3i2.3015

Abstract

Vegetables are food commodities widely consumed by the public due to their high nutritional content. Chili (Capsicum annuum L.), green beans (Phaseolus vulgaris L.), and Chinese cabbage (Brassica pekinensia L.) are among the vegetables that can be processed into various delicious dishes or consumed fresh as raw vegetables. To obtain healthy and high-quality vegetable crops, pesticides are commonly used to control pests that may damage the plants. One of the widely used pesticides is chlorpyrifos, which can leave residues that may pose both acute and chronic health risks. Therefore, it is necessary to analyze the levels of chlorpyrifos pesticide residues in vegetables. The residue levels were determined using a UV-Vis spectrophotometer at a wavelength of 230 nm with dichloromethane as the solvent, while qualitative analysis was performed using HPLC by comparing the retention times of standard solutions and vegetable samples. In this study, washing treatments were applied to the vegetables using dichloromethane, distilled water, well water, and tap water (PDAM) to evaluate the effect of washing on pesticide residue levels. The concentrations of pesticide residues in unwashed vegetables were chili (2.6680 ± 0.0214 mg/kg), green beans (2.4658 ± 0.0193 mg/kg), and Chinese cabbage (2.7950 ± 0.0379 mg/kg). The washing process was carried out three times for each solvent. After three washings using dichloromethane and distilled water, pesticide residues were no longer detected, whereas washing with tap water (PDAM) and well water still left residues, although at levels much lower than the Maximum Residue Limit (MRL). The health risk assessment showed that the aHQ and cHQ values were < 1, indicating that consumption within the recommended limits of these samples does not pose health risks, either in the short term or long term. This study provides important information that repeated washing is necessary to effectively reduce pesticide residue levels in vegetables before consumption.
Degradasi Residu Pestisida Klorpirifos pada Buncis Menggunakan Katalis TiO2/Zeolit secara Fotolisis Z. Zilfa; Tio Putra Wendari; Rahmadhani Khairul Baryah
Jurnal Kimia Unand Vol. 15 No. 1 (2026): Mei 2026
Publisher : Departemen Kimia Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jku.15.1.14-25.2026

Abstract

Pesticide residues such as chlorpyrifos in agricultural products are toxic to both human health and the environment. Titanium dioxide (TiO2) is a widely used photocatalyst for pollutant removal; however, its efficiency is limited due to its relatively low surface a-rea. To enhance its photocatalytic performance, natural zeolit was employed to improve the effectiveness of TiO2. Zeolit has a high surface area and strong adsorption capacity, and when combined with a photocatalyst, it can improve pollutant degradation efficiency through simultaneous adsorption and photocatalysis. This study aims to degrade chlorpyrifos pesticide residue on green beans using TiO2 supported by zeolit through a photolysis process. The TiO2/zeolit catalyst was synthesized through activation and saturation of zeolit, followed by combination with TiO2. Chlorpyrifos residues on green bean samples were analyzed using a UV-Vis spectrophotometer, while catalyst characterization was conducted using FTIR and XRD. The study also looked at the effects of photolysis time and catalyst dosage on degradation efficiency. The results showed that the degradation percentage of chlorpyrifos under UV light reached 72.88% with TiO2 and 30.17% with zeolit. The TiO2/zeolit composite exhibited a significant improvement in degradation efficiency, reaching 98.82%, indicating an effective synergy between photolysis and adsorption. In the absence of UV irradiation, degradation was only 44.45%, confirming the essential role of UV light in activating TiO2 as a photocatalyst and enhancing the degradation of chlorpyrifos. The degradation of chlorpyrifos using TiO2/zeolit followed first-order kinetics, where the reaction rate is directly proportional to the remaining chlorpyrifos concentration. FTIR analysis of the samples indicated successful degradation through the reduction of characteristic peak intensities. Furthermore, FTIR and XRD characterizations of the catalyst showed that the TiO2/zeolit catalyst maintained its structural stability after the degradation process, allowing for potential reuse. This study shows that TiO2/zeolit is effective for photocatalytic pesticide removal and may be applied in agricultural waste treatment.
Utilization of Shrimp Shell Waste as Nitrogen Source in N-Doped TiO₂ for Degradation of Polyethylene Microplastics Nurhasni Nurhasni; Annisaul Izzah; Aisyah Rahma Dwitami; Yuza Ahmad Gumilang; Zilfa Zilfa; Diana Vanda Wellia
Jurnal Kimia Sains dan Aplikasi Vol 28, No 3 (2025): Volume 28 Issue 3 Year 2025
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jksa.28.3.115-121

Abstract

Microplastic pollution presents a significant challenge globally, posing serious threats to aquatic ecosystems. This study explores the photocatalytic degradation of microplastics in aqueous solutions by applying nitrogen-doped TiO2 (N-TiO2) nanoparticles under visible light. The N-TiO2 nanoparticles were synthesized via the solvothermal method, utilizing chitosan derived from shrimp shell waste as a nitrogen source. The photocatalytic efficacy of the N-TiO2 nanoparticles was assessed for degrading model polyethylene microplastics, illuminated by a 50-watt LED lamp. Characteristic peak shifts in the FTIR absorption spectrum, notably at 3429 cm-1 to lower wavenumbers, and diminished amide I absorption at 1621 cm-1, confirmed the successful extraction of chitosan from shrimp shell waste. The synthesized N-TiO2 nanoparticles were in the pure anatase phase, exhibited a reduced bandgap of 2.97 eV, and showed enhanced absorption in the visible light spectrum (λ=400 – 800 nm) compared to undoped TiO2. The incorporation of nitrogen into the TiO2 matrix was validated by vibration bands at approximately 1035 cm-1 and 535 cm-1, corresponding to the Ti—N and Ti—O—Ti bonds, respectively. Optimal results were attained with TiO2 nanoparticles doped with 50% nitrogen, achieving a degradation rate of approximately 30.45% of a 250 mg/L microplastic solution over 50 hours of visible light exposure—nearly six times more effective than undoped TiO2. This study highlights the sustainable use of shrimp shell waste as a nitrogen source for enhancing TiO2 nanoparticles, showcasing their potential for environmental remediation applications.
PEMANFAATAN LIMBAH PADAT PERTANIAN DAN PERIKANAN SEBAGAI BIOSORBEN UNTUK PENYERAP BERBAGAI ZAT WARNA: SUATU TINJAUAN Putri Ramadhani; Rahmiana Zein; Zulkarnain Chaidir; Zilfa; Linda Hevira
Jurnal Zarah Vol. 7 No. 2 (2019): October, 2019
Publisher : Fakultas Keguruan dan Ilmu Pendidikan, Universitas Maritim Raja Ali Haji

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31629/zarah.v7i2.1396

Abstract

Artikel ulasan ini memaparkan perkembangan terkini pada aplikasi metode adsorpsi dalam menghilangkan zat warna dalam air limbah. Artikel ulasan ini memberikan informasi mengenai aplikasi zat warna serta penanganan limbah dari aktivitas industri yang menggunakan zat warna dan informasi mengenai penggunaan limbah padat pertanian dan perikanan sebagai penyerap berbagai jenis zat warna. Pengolahan limbah yang mengandung zat warna melalui adsorpsi menggunakan adsorben alternatif berbiaya rendah merupakan bidang yang saat ini berkembang dan banyak diminati karena memiliki manfaat yaitu untuk pengelolaan limbah cair dan pemanfaatan limbah padat organik.
Co-Authors - Hariyanti - Zulfarman Adlis Santoni Admi Admi Afrizal Afrizal Aisyah Rahma Dwitami Aju Deska Aldini, Tasya Alsa Sepia Putri Amanda, Selya Annisaul Izzah Benny Damas Putra Bustanul Arifin BUSTANUL ARIFIN Deliza Deliza Deliza, Deliza Deswati Deswati Dwi Syukur Phameswari Elida Mardiah Emil Salim Emriadi - Febi Rahmi Fheiza Heysha Fiska Julian Tasari Fivi Mona Bareno Hamzar Suyani Hariyanti, - Hermansyah Aziz Hermansyah Aziz Hevira, Linda Heysha, Fheiza Ilahi, Fitratul Imelda Imelda Imran Nazar Linda Hevira Mai Efdi Mai Efdi Matlal Fajri Alif Megita Febiola Mia Yeliandri Mirawati Mirawati Mirawati Mirawati Mitha Anggreini Putri Muhammad Hafiz Reza Neneng Swesty Norman Ferdinal Novesar Jamarun Novesar Jamarun Nurhasni Nurhasni Nurul Afifah Nurul Annisyah Olly Norita Tetra Putri Julanda Ardica Putri Ramadhani Putri Ramadhani Putri Ramadhani, Putri Putri, Anggi Nabila Putri, Mitha Anggreini Rahmadhani Khairul Baryah Rahmayeni Rahmayeni Rahmi, Febi Rahmiana Zein Raihan Hanif Aulia Refilda Refilda Refinel - Ria Elvi Susanti Risa Oktaviani Safni Safni Safni Salim, Emil Salsa Nurul Fadhilah Siti Zahara Sumaryati Syukur Suryati Suryati Suryati Swesty, Neneng Syafrizayanti Syafrizayanti Syahril Syahril Syiffa Fauzia Syukri Syukri - Syukri Arief Syukri Arief Syukri Syukri Tasari, Fiska Julian Tasya Aldini Teti Nurhayatul Rahmi Tio Putra Wendari Tommi Hermansyah Upita Septiani Upita Septiani Vivi Sisca Vivi Sisca Wellia, Diana Vanda Welly, Desra Wilda Putri Suhada Yefrida - Yetria Rilda Yulizar Yusuf Yulizar Yusuf Yuza Ahmad Gumilang Zakiyuda, Aufa Zulfarman, - Zulkarnain Chaidir