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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 Jurnal Kimia Unand

Zilfa Zilfa

Andalas University

Author-ID : 428593

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 Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Medicine & Pharmacology Social Sciences Other

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Synthesis and Characterization of CaO Limestone from Lintau Buo Supported by TiO2 as a Heterogeneous Catalyst in the Production of Biodiesel Vivi Sisca; Aju Deska; Syukri Syukri; Zilfa Zilfa; Novesar Jamarun
Indonesian Journal of Chemistry Vol 21, No 4 (2021)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.64675

Biodiesel constitutes an alternative to diesel fuel, developing a base catalyst in cost efficiency and reducing the impact on the environment due to toxic waste and excessive chemicals. This study employed a mixture of an oxide catalyst, CaO/TiO2, which was ably synthesized as a heterogeneous catalyst to convert waste frying oil (WFO) into biodiesel. Heterogeneous catalysts have been characterized by XRD, FT-IR, TEM, SEM-EDX, and BET to identify their crystal type, morphology, composition, and surface area. Catalytic activity was affected by the amount, oil/methanol ratio, reaction temperature, and duration. A 94% biodiesel yield was achieved by optimizing the following reaction parameters: 5wt.%, 6:1 methanol: oil, 65 °C, for 4 h. The addition of TiO2 to CaO improves the catalyst stability and transforms the reactants into products. The structure and characteristics of TiO2 maintained stability and supported CaO well. Its repeated biodiesel fuel production demonstrated the catalyst stability from WFO throughout the transesterification reaction.

Aplikasi teknik biosorpsi menggunakan biosorben kulit batang sagu, arang aktif kulit buah kakao dan cangkang langkitang untuk mengolah air limbah CPO Rahmiana Zein; Imran Nazar; Zilfa Zilfa
Jurnal Litbang Industri Vol 10, No 1 (2020)
Publisher : Institution for Industrial Research and Standardization of Industry - Padang

Penelitian ini dilakukan untuk mengetahui kemampuan biosorben kulit batang sagu, arang aktif kulit buah kakao dan cangkang langkitang dalam mengolah air limbah CPO. Penelitian dilakukan pada massa dan laju alir terbaik untuk pengolahan air limbah CPO dengan sistem aliran kontinu dan sistem aliran siklus serta menentukan kapasitas biosorpsi biosorben. Pengujian air limbah dan air olahan adalah pH, TSS, BOD dan COD. Analisis biosorben dilakukan untuk melihat gugus fungsi dengan FTIR, morfologi permukaan dengan SEM dan komposisi kimia biosorben dengan XRF. Massa dan laju alir terbaik masing-masing biosorben yang didapatkan dari percobaan yaitu 100 gram dan 100 mL/menit. Penelitian dengan sistem kontinu didapatkan hasil air olahan dengan nilai pH 6 s.d 7 dan persentase penurunan nilai TSS 99,53%; BOD 57,23% dan COD 90,85%. Penelitian dengan sistem kontinu dan siklus sebanyak 3 siklus didapatkan hasil air olahan dengan pH 6 s.d 7 dan persentase penurunan nilai TSS 99,66%; BOD 81,69% dan COD 95,90%. Hasil penelitian uji kinerja sistem, biosorben mampu mengolah air limbah sebanyak 12,5 L. Analisis biosorben menggunakan SEM, FTIR dan XRF didapatkan hasil yang berbeda antara biosorben sebelum dan sesudah kontak dengan air limbah yang menunjukan biosorben dan air limbah terjadi interaksi (biosorpsi).

Pengembangan Usaha Akuaponik di Kolam Ikan TPQ & RTQ Raudhatul Adzkia Dalam Koto, Kabupaten Agam Refilda Refilda; Rahmiana Zein; Hermansyah Aziz; Yefrida Yefrida; Zilfa Zilfa; Syukri Syukri; Matlal Fajri Alif; Yulizar Yusuf; Admi Admi; Raihan Hanif Aulia; Nurul Afifah
Warta Pengabdian Andalas Vol 29 No 4 (2022)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat (LPPM) Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jwa.29.4.436-442.2022

The Community Service Team of the Chemistry Department has worked closely with the Taman Pendidikan Qur'an (TPQ) and Rumah Tahzhul Qur'an (RTQ) Raudhatul Adzkia Jorong Dalam Koto Nagari Koto Tangah in solving problems faced by partners. The pond catfish farming business supports smooth operational costs and has been running for over a year, but these results still need to be improved for TPQ and RTQ. This activity aims to develop a catfish farming business accompanied by an aquaponic cultivation business to increase income from TPQ and RTQ. The benefit of this activity is that the partners have an Aquaponics business which is cultivating catfish and vegetable plants in the fish pond. The Community Service Team transferred knowledge to partners, especially in cultivating aquaponic plants through entrepreneurship. The activities of the Community Service Team in helping partners are a form of the Andalas University Higher Education Tri Dharma. The method applied to support the realization of this community service program was through supervision, program socialization, and implementation of activities. The result of this activity was that partners could run an aquaponics business to increase income to meet the operational costs of education and teacher salaries.

PEMANFAATAN ZEOLIT ALAM CLINOPTILOLITE-Ca SEBAGAI PENDUKUNG KATALIS ZnO UNTUK MENDEGRADASI ZAT WARNA METHYL ORANGE DENGAN METODA FOTOLISIS Zilfa; Rahmiana Zein; Teti Nurhayatul Rahmi
Journal of Research and Education Chemistry Vol. 5 No. 1 (2023): April
Publisher : UIR Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jrec.2023.vol5(1).12505

Penelitian mengenai degradasi zat warna Methyl Orange dengan metoda fotolisis menggunakan katalis ZnO/zeolit telah dilakukan. Penelitian ini bertujuan untuk mengurangi kadar zat warna Methyl Orange yang diketahui berbahaya bagi lingkungan dan kesehatan. Pada penelitian ini digunakan zat warna Methyl Orange dengan konsentrasi 6 mg/L, selanjutnya didegradasi secara fotokatalisis dengan beberapa variasi waktu dan massa katalis untuk mengetahui kondisi optimum dari degradasi Methyl Orange. Analisis hasil degradasi diukur menggunakan spektrofotomet UV-VIS. Berdasarkan hasil penelitian diperoleh persentase degradasi Methyl Orange dengan beberapa perlakuan, yaitu dengan tanpa katalis, dengan zeolit, dengan ZnO. dan dengan ZnO/zeolit . Hasil analisis menunjukkan degradasi tanpa katalis adalah 5,83%, menggunakan zeolite 32,51%, dan menggunakan ZnO 60,09%, selama waktu irradiasi 90 menit.Selanjutnya degradasi menggunakan katalis ZnO/zeolit persentase degradasi Methyl Orange meningkat menjadi 93,27% (massa katalis 0,8 g dan waktu irradiasi 90 menit). Analisis hasil degradasi metil orange menggunakan FTIR didapatkan behwa terjadi pergeseran bilangan gelombang yang menyatakan terjadinya degradasi. Karakterisadi katalis ZnO/zeolite menggunakan FTIR dan XRD tidak terjadi perubahan struktur dari ZnO/zeolite yang berarti bahwa ZnO/zeolite dapat digunakan sebagai katalis dalam degradasi methyl orange. Berdasarkan data tersebut dapat dikatakan bahwa katalis ZnO/zeolit berhasil meningkatkan persentase degradasi Methyl Orange dibandingkan menggunakan katalis ZnO saja dan zeolit saja.

The Degradation of congo red color substance in ozonolysis way by the addition of ZnO/ zeolite catalyst and its analysist using HPLC Zilfa Zilfa; Ria Elvi Susanti
JURNAL KATALISATOR Vol. 6 No. 1 (2021): jurnal Katalisator Volume 6 No 1, 2021
Publisher : LLDIKTI X Sumbar, Riau, Jambi, Kepri

The research about the degradation of congo red color substance using the ZnO/ zeolite catalyst and ozonolysis has been conducted. This research includes the production of ZnO/ zeolite catalyst and its usage to degrade the congo red color substance. This research studies about the impact of the variation time of degradation, the effect of ZnO/ zeolite catalyst weight, the effect of time variation towards the degradation by the addition of ZnO/ zeolite catalyst, ZnO and Zeolite. After that, the result after degradation in optimum condition with HPLC (High Performance Liquid Chromatography). The result of the research shows HPLC analysist of Congo red which is degraded in ozonolysis way without the addition of catalyst results in degradation percentage of 77.27%, 88. 41 % in the addition of ZnO catalyst, 90.94% in the addition of Zeolite catalyst,and 93% in the addition of Zno/ zeolite .

THE USE OF TiO2/ZEOLITE TO REDUCE THE CONCENTRATION OF NITRATE, NITRITE, AMMONIAC, PHOSPHATE, BOD, COD AND pH IN AGRICULTURAL WASTE WATER PHOTOLYSIS Zilfa Zilfa; Rahmayeni Rahmayeni; Diana Vanda Wellia; Yulizar Yusuf; Putri Julanda Ardica; Siti Zahara; Muhammad Hafiz Reza
JURNAL KATALISATOR Vol. 7 No. 2 (2022): jurnal Katalisator Volume 7 No 2, Oktober 2022
Publisher : LLDIKTI X Sumbar, Riau, Jambi, Kepri

This study aims to determine the effect of the use of TiO2/Zeolite on reducing concentrations of nitrate, nitrite, ammonia, phosphate, BOD, COD and pH in agricultural wastewater by photolysis. In this study, sample analysis was carried out using UV-Vis spectrophotometer and FTIR and for the characterization of TiO2/Zeolite catalysts using FTIR, XRD and SEM. In agricultural wastewater samples, the initial concentration of nitrate was 11,409 mg/L, nitrite was 0,424 mg/L, ammonia was 5,075 mg/L and phosphate was 5,364 mg/L. The most optimum decrease in concentration for nitrate, nitrite, ammonia and phosphate, respectively, was 4,332 mg/L with an irradiation time of 90 minutes; 0,118 mg/L with an irradiation time of 75 minutes; 0.395 mg/L with an irradiation time of 90 minutes and 1,207 mg/L with an irradiation time of 60 minutes on the addition of TiO2/Zeolite as much as 0.8 grams for the determination of nitrate and phosphate while for nitrite and ammonia as much as 0.6 grams. Prior to the degradation, the BOD value was 62,4 mg/L and the COD value was 107,07 mg/L. Meanwhile, after degradation, the BOD value decreased to 5,92 mg/L and COD to 35 mg/L. The results of the analysis using FTIR on agricultural wastewater show that there is no significant shift in wave number before and after degradation. The characterization of TiO2/Zeolite catalyst using FTIR, XRD and SEM did not show significant changes before and after the degradation process was carried out which indicated that TiO2/zeolite could be applied in degrading agricultural wastewater.

Pelatihan Praktikum Kimia Sederhana di SMAN 16 Padang Imelda Imelda; Refinel Refinel; Refilda Refilda; Yefrida Yefrida; Hermansyah Aziz; Yulizar Yusuf; Suryati Suryati; Zulkarnain Chaidir; Sumaryati Syukur; Rahmiana Zein; Novesar Jamarun; Safni Safni; Zilfa Zilfa; Yetria Rilda; Norman Ferdinal; Tommi Hermansyah; Fivi Mona Bareno
Warta Pengabdian Andalas Vol 30 No 3 (2023)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat (LPPM) Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jwa.30.3.562-568.2023

Chemistry is one of the subjects taught in State Senior High Schools (SMAN), especially in Natural Sciences (IPA). The problem with chemistry subjects is that it is difficult to practice in the laboratory because laboratory facilities such as space, equipment and chemicals are expensive. As a result, chemical laboratory practices were only sometimes carried out. Several lecturers and students from the Department of Chemistry, FMIPA Unand Kimia Unand, carried out service activities at SMAN 16 Padang through laboratory practice using materials and equipment that were cheap and readily available in the surrounding environment. This community service aims to train teachers and students to carry out chemistry practicums using simple materials and equipment available around them. The training was given to chemistry subject teachers and students in the science laboratory at SMAN 16 on 17 and 21 November 2022. The material was practised in oxidation and reduction (redox) and electrolysis reactions. The activity went smoothly; the students enthusiastically carried out the practicum. Through the results of this simple chemistry practicum, students can design and carry out chemical experiments using simple tools and materials, conduct direct observations of chemical processes, practice scientific thinking, attitude and work skills and analyze and solve various scientific processes using scientific methods. SMAN 16 hopes that this activity will continue with different topics.

DEGRADASI FENOL MENGGUNAKAN TiO2/ZEOLIT SECARA FOTOLISIS DAN APLIKASINYA PADA AIR LIMBAH KARET Zilfa; Yulizar Yusuf; Salsa Nurul Fadhilah; Rahmiana Zein
Journal of Research and Education Chemistry Vol. 6 No. 1 (2024): April
Publisher : UIR Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jrec.2024.vol6(1).17258

Fenol merupakan salah satu polutan umum pada berbagai industri. Fenol berbahaya dalam air limbah karena bersifat toksik walaupun pada konsentrasi yang rendah. Keberadaan fenol dalam air limbah dapat mengganggu organisme di sekitarnya. Penelitian tentang degradasi fenol menggunakan TiO2/zeolit secara fotolisis dan aplikasinya pada air limbah karet dan CPO telah dilakukan. Metoda analisis sampel air limbah karet dan CPO menggunakan spektrofotometer UV-Vis dan FTIR sedangkan karakterisasi katalis dengan FTIR dan XRD. Kondisi optimum dari degradasi fenol tanpa katalis didapatkan persen degradasi sebesar 15,79% dengan waktu penyinaran selama 75 menit, sedangkan degradasi fenol menggunakan TiO2/zeolit sebanyak 0,8 gram didapatkan persen degradasi sebesar 75,28%. Degradasi fenol dengan katalis TiO2 saja dengan waktu penyinaran selama 60 menit didapatkan persen degradasi sebesar 52,86%. Degradasi fenol dengan zeolit saja diperoleh persen degradasi sebesar 38,90% dengan waktu penyinaran 75 menit. Degradasi fenol dengan menggunakan TiO2/zeolit sebanyak 0,8 gram dengan penyinaran selama 75 menit didapatkan persen degradasi sebesar 76,43%, tetapi tanpa disinari UV didapatkan persen degradasi sebesar 35,69%. Degradasi fenol yang ada dalam air limbah karet dan CPO dilakukan dengan penambahan TiO2/zeolit sebanyak 0,8 gram dengan lama penyinaran 75 menit didapatkan persen degradasi sebesar 51,53% pada air limbah karet dan 59,56% pada air limbah CPO. Karakterisasi air limbah sebelum dan sesudah degradasi dengan FTIR terjadi pergeseran bilangan gelombang yang menunjukkan bahwa telah terjadi degradasi. Karakterisasi katalis sebelum dan setelah degradasi dengan menggunakan FTIR dan XRD menunjukkan tidak terjadinya perubahan struktur, oleh karena itu TiO2/Zeolit dapat digunakan untuk degradasi fenol.

The Contributions of Principals Leadership and Climate's School to Performance of Teachers Elementary School at Lubuk Basung District, Agam Regency Zilfa Zilfa; Syahril, Syahril
International Journal Of Humanities Education and Social Sciences (IJHESS) Vol 3 No 3 (2023): IJHESS DECEMBER 2023
Publisher : CV. AFDIFAL MAJU BERKAH

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55227/ijhess.v3i3.793

This research was based on a case where the result of observation by researcher in Elementary School at Kecamatan Lubuk Basung Kabupaten Agam that showed the low level of teacher performance. Many factors affected the teacher performances which are principal’s leadership and climate school. The purpose of this research are to know about: (1) contribution of principals leadership to teacher performance, (2) contribution of climate school to teachers performance, and (3) contribution of principals leadership and climate school are jointly to teachers performance. The method of this study is quantitative research with sample are 76 teachers at Elementary School in Kecamatan Lubuk Basung Kabupaten Agam. Sample in this research has taken by stratified proportional random sampling method. Instrument in this research using questionnaire. The results of the analysis data show that (1) principals leadership contributes significantly to teachers of 15.8%, (2) climate school contributes significantly to teachers of 50.9 %, and (3) principal’s leadership and climate school make a significant contribution to teachers performance of 54%, so the conclusion of this research are that hypothesis acceptable empirically and principal’s leadership and climate school variable are two factors that contribute to the teacher performance and 46% of the remaining influence by another factors

PENENTUAN KADAR RESIDU PESTISIDA KLORPIRIFOS DAN PENGARUH PENCUCIAN PADA CABAI, BUNCIS DAN SAWI PUTIH SERTA NILAI RISIKO KESEHATAN PADA MANUSIA Zilfa; Yusuf, Yulizar; Anggreini Putri, Mitha; Heysha, Fheiza
Jurnal Zarah Vol. 12 No. 1 (2024): Jurnal Zarah
Publisher : Fakultas Keguruan dan Ilmu Pendidikan, Universitas Maritim Raja Ali Haji

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

Sayuran merupakan bahan pangan yang digemari masyarakat untuk dikonsumsi karena banyak mengandung nutrisi. Cabai (Capsicum annuum L.), buncis (Phaseolus vulgaris L), sawi putih (Brassica pekinensia L) termasuk sayuran yang dapat diolah menjadi berbagai olahan sayuran yang lezat maupun dimakan sebagai lalapan. Untuk memperoleh tanaman sayuran yang subur diperlukan pestisida untuk membasmi hama yang dapat merusak sayuran. Salah satu pestisida yang banyak digunakan yaitu klorpirifos yang dapat meninggalkan residu sehingga menyebabkan risiko akut dan kronis pada kesehatan, oleh sebab itu perlu dilakukan analisis mengenai kadar residu pestisida klorpirifos pada sayuran. Kadar residu pestisida klorpirifos ditentukan menggunakan spektrofotometer UV-Vis dengan panjang gelombang 230 nm menggunakan pelarut diklorometana dan analisis kualitatif menggunakan HPLC dengan membandingkan waktu retensi larutan standar dan sampel sayuran. Pada penelitian ini dilakukan pencucian pada sayuran menggunakan diklorometana, akuades, air sumur dan air PDAM untuk melihat pengaruh pencucian terhadap kadar residu pestisida yang terkandung. Konsentrasi residu pestisida pada sayuran yang tidak dicuci yaitu cabai (2,6680±0,0214 mg/kg), buncis (2,4658±0,0193 mg/kg), dan sawi putih (2,7950±0,0379 mg/kg). Proses pencucian pada sayuran dilakukan tiga kali untuk masing-masing pelarut. Pencucian tiga kali menggunakan diklorometana dan akuades, didapatkan bahwa residu pestisida sudah tidak terdeteksi, sedangkan pencucian menggunakan air PDAM dan air sumur masih menyisakan residu pada sayuran tetapi kadarnya sangat kecil dibandingkan nilai Batas Maksimum Residu (BMR). Pada perhitungan nilai resiko kesehatan diperoleh nilai aHQ dan cHQ <1 yang menunjukkan bahwa konsumsi batas yang dianjurkan dari sampel penelitian ini tidak menimbulkan risiko kesehatan baik jangka pendek maupun jangka panjang.. Penelitian ini memberikan informasi bahwa perlu pencucian berulang kali untuk menghilangkan kadar residu pestisida pada sayuran sebelum dikonsumsi.

Co-Authors - Hariyanti - Zulfarman Adlis Santoni Admi Admi Afrizal Afrizal Aju Deska Aldini, Tasya Alsa Sepia Putri Amanda, Selya Anggreini Putri, Mitha Aufa Zakiyuda Bustanul Arifin BUSTANUL ARIFIN Deliza , Deliza Deliza, Deliza Desra Welly Deswati Deswati Dwi Syukur Phameswari Dwitami, Aisyah Rahma Elida Mardiah Emil Salim Emriadi - Febi Rahmi Fiska Julian Tasari Fivi Mona Bareno Gumilang, Yuza Ahmad Hamzar Suyani Hariyanti, - Hermansyah Aziz Hermansyah Aziz Hevira, Linda Heysha, Fheiza Ilahi, Fitratul Imelda Imelda Imran Nazar Izzah, Annisaul Mai Efdi Mai Efdi Matlal Fajri Alif Megita Febiola Mia Yeliandri Mirawati Mirawati Mirawati Mirawati Muhammad Hafiz Reza Neneng Swesty Norman Ferdinal Novesar Jamarun Novesar Jamarun Novesar Jamarun Nurhasni Nurhasni Nurul Afifah Nurul Annisyah Olly Norita Tetra Putri Julanda Ardica Putri Ramadhani Putri Ramadhani, Putri Putri, Anggi Nabila 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 Arief Syukri Arief Syukri Syukri Syukri Syukri Tasari, Fiska Julian Teti Nurhayatul Rahmi Tommi Hermansyah Upita Septiani Upita Septiani Vivi Sisca Vivi Sisca Wellia, Diana Vanda Wilda Putri Suhada Yefrida - Yefrida Yefrida Yetria Rilda Yulizar Yusuf Yulizar Yusuf Zulfarman, - Zulkarnain Chaidir

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