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All Journal al-Kimiya Jurnal Riset Kimia CHEMPUBLISH JOURNAL Jurnal Zarah Molekul: Jurnal Ilmiah Kimia Jurnal Farmagazine Warta Pengabdian Andalas: Jurnal Ilmiah Pengembangan Dan Penerapan Ipteks Jurnal Katalisator
Yulizar Yusuf
Universitas Andalas
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Education Health Professions Immunology & microbiology Medicine & Pharmacology Social Sciences Other

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Pengaruh Penggunaan Fly Ash dari Berbagai Sumber terhadap Sifat Kimia dan Sifat Fisika pada Semen Tipe I (OPC) Yulizar Yusuf; Vivin Firman Savitri; Hermansyah Aziz
Jurnal Riset Kimia Vol. 11 No. 2 (2020): September
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v11i2.350

Abstract

The aim of this study is to utilize fly ash from various sources on chemical and physical properties of cement type I (OPC). Utilization of fly ash can improve the strengthness of the cement. It can reduce the waste of fly ash by utilization into cement process. The procedure has been carried out on cement type I (OPC) with the addition of fly ash additives from various sources with concentration variations such as 10% and 20%. Utilization of fly ash as additives substance in cement works to improve the quality of cement. The main parameter in determining the quality of cement is determined by the compressive strength. The results of the compressive strength test showed that the addition of fly ash with a concentration of 10% had a higher effect on the compressive strength than the addition of a concentration of 20%. 5 types fly ash from various sources, fly ash from PT Sinar Mas gives greater compressive strength at 28 days. the addition of fly ash additives to OPC cement mixture has chemical and physical properties which are not much different from properties of PCC cement.
Analisis kadar logam berat (Fe, Zn, Pb, Cd) dan nilai risiko kesehatan dalam buah kemasan kaleng Refilda Suhaili; Yulizar Yusuf
CHEMPUBLISH JOURNAL Vol. 6 No. 1 (2021): Chempublish Journal
Publisher : Department of Chemistry, Faculty of Science and Technology Universitas Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/chp.v6i1.12148

Abstract

Seiring dengan perkembangan teknologi yang semakin pesat, buah-buahan banyak dikemas dalam kaleng. Buah kemasan kaleng merupakan makanan yang sering dikonsumsi oleh manusia pada saat ini. Penyimpanan buah kemasan kaleng dalam waktu yang lama dapat menyebabkan terjadinya migrasi logam berat terhadap buah yang ada di dalam kemasan. Pada penelitian ini sampel yang digunakan yaitu 3 jenis buah-buahan dalam kemasan kaleng masing-masing dengan lama penyimpanan yang berbeda. Preparasi sampel dilakukan menggunakan metode destruksi basah dengan menambahkan campuran HNO3 pekat 65% dan H2O2 15% (3:1). Kandungan logam Fe, Zn, Pb, dan Cd dalam sampel ditentukan menggunakan metode Spektrofotometri Serapan Atom (SSA). Nilai Indeks Risiko Kesehatan (IRK) didapatkan dari hasil perhitungan Asupan Logam Harian (ALH) per dosis yang disarankan oleh WHO. Nilai ALH diperoleh dari perhitungan konsentrasi logam dengan SSA, faktor konversi, dan rata-rata asupan logam per berat badan manusia. Kadar logam berat di dalam ketiga jenis sampel secara umum diperoleh Fe>Zn>Pb>Cd. Konsentrasi logam berat berbanding lurus dengan lama produk disimpan dalam kemasan kaleng. Semakin lama produk disimpan maka konsentrasi logam yang diperoleh semakin tinggi. Nilai IRK yang diperoleh dari pengujian sampel untuk logam Cd yaitu >1 dapat diasumsikan adanya potensi risiko kesehatan, sedangkan untuk logam Pb, Fe, dan Zn <1 yang diasumsikan populasi dinyatakan aman. Nilai TIRK yang diperoleh dari penambahan nilai IRK logam Pb, Cd, Fe, dan Zn, didapatkan hasil dari setiap sampel >1 dapat dinyatakan bahwa sampel yang diuji memiliki potensi risiko kesehatan terhadap manusia. Penelitian lebih lanjut diperlukan untuk memperjelas hubungan antara kontaminasi buah oleh logam berat dari kemasan kaleng.
Degradation of Phenol By Photolysis Using N-doped TiO2 Catalyst Safni Safni; Mechy Rezita Wahyuni; Khoiriah Khoiriah; Yulizar Yusuf
Molekul Vol 14, No 1 (2019)
Publisher : Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (285.977 KB) | DOI: 10.20884/1.jm.2019.14.1.447

Abstract

Phenol (C6H5OH) is a common contaminant in wastewater. In certain concentrations, phenol can inhibit the activity of microorganisms and give adverse effects tohumanhealth, such as liver and kidney damage, perfect heart rate, and lower blood pressure. In this study, phenol was degraded with andwithoutN-doped TiO2under photolysis UV-light (10 Watts, λ = 365 nm) and visible-light (13 watt Philips, lux= 1400, λ = 465-640 nm)irradiation. The reductionof phenol concentrationwas measured by a UV-Vis spectrophotometer at a wavelength 200-400 nm. Some parameters such as catalyst dose, irradiation timesand type of light sources were studied. The XRD and DRS UV-Vis characterization confirmthat the nitrogen modified of titania catalyst potentially actives in visible-light. The N-doped TiO2is able to catalyze and improve the efficiency of phenol degradation in photocatalysissystem. Phenol with initialconcentration 8 mg/L was degraded by 33.89% and 30.51% without catalyst and increased to be 90.8% and 67.80%by additionof 15 mg N-doped TiO2catalyst under UV-light and visible-lightfor 210 minutes photolysis, respectively. From the results,irradiation using UV-light achieveshigherefficiency than visible-lightonphenol degradation.
Penerapan Teknologi Paper Filigree 3-Dimensi Berbasis Limbah Menjadi Produk Bernilai Ekonomi Tinggi dalam Meningkatkan Pendapatan Rumah Tangga di Talawi Mudik Olly Norita Tetra; Bustanul Arifin; Hermansyah Aziz; Zulhadjri Zulhadjri; Indrawati Indrawati; Yulizar Yusuf
Warta Pengabdian Andalas Vol 26 No 4.a (2019)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat (LPPM) Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jwa.26.4.a.271-277.2019

Abstract

The activity of utilizing waste paper into high economic value products had been carried out in Talawi Mudik. The activity was carried out through the transfer of Paper Filigree 3-Dimensional technology, namely processing waste paper into a classy business based on zero waste. That it can contribute in empowering the community, especially increasing family income, contributing to women who did not work and activated of PKK and dasawisma. The purpose of this activity was to make this technology business opportunity. It can be done by anyone due to the processing in short time, low invest, used tools and materials surrounding. The community service activity started with counseling the dangerous of paper waste in health and environment, followed by training on waste paper processing with simple waste-based techniques. In the training, the participants immediately practiced producing products, assisted until they do themself. The participants were equipped with entrepreneurial concepts and marketing techniques to motivated them to form a home industry. It could impact on new job opportunities, increased family income and the formation of new business groups that provided the program to be sustainable.
Pelatihan Pembuatan Desinfektan dan Hand Sanitizer Non-Alkohol di Kelurahan Seberang Padang, Kota Padang Yulizar Yusuf; Hermansyah Aziz; Adlis Santoni; Syukri Syukri; Novesar Jamarun; Bustanul Arifin; Olly Norita Tetra; Norman Ferdinal; Matlal Fajri Alif
Warta Pengabdian Andalas Vol 27 No 3 (2020)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat (LPPM) Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jwa.27.3.213-218.2020

Abstract

Seberang Padang Village, South Padang District, is next to Padang City, which has approximately 200 families. This location is a crossing area between Padang-Painan, in West Sumatra. The community consists of two existing traditional markets that sell daily necessities. Besides that, there is also one elementary school, two junior high schools, and one high school. The global Covid-19 pandemic certainly affects the community's daily activities and learning activities, including children, elementary school students, middle and high school students, and the village community to fulfil their basic needs. Furthermore, the main problem of Covid-19 is not only about the effects caused by the virus on sufferers but also about its high-speed transmission. Therefore, to educate the community around the Seberang Padang village, several Chemistry Lecturers and students at the Faculty of Mathematics and Natural Sciences at Andalas University did a community engagement. They taught the community about making disinfectants and hand sanitizers without alcohol that can overcome the occurrence of Covid-19 transmission. In addition, face masks were provided for the community, and the alms of food for underprivileged residents to push down the negative impact of Covid-19.
PENENTUAN KUALITAS AIR MINUM TERHADAP PARAMETER pH, TDS, COD, BESI, KESADAHAN TOTAL, KANDUNGAN BAKTERI E. COLI DAN COLIFORM PADA BEBERAPA RUMAH MAKAN DI SEKITAR AIR TAWAR KOTA PADANG Diana Sylvia; Yulizar Yusuf; Bustanul Arifin
Jurnal Farmagazine Vol 1, No 2 (2014): Jurnal Farmagazine
Publisher : STF Muhammadiyah Tangerang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47653/farm.v1i2.53

Abstract

Telah dilakukan penelitian mengenai kualitas air minum di beberapa rumah makan sekitar Air Tawar Kota Padang. Penelitian ini bertujuan untuk mengetahui kualitas air minum yang disediakan rumah makan tersebut terhadap parameter pH, TDS, COD, besi, kesadahan total, kandungan bakteri E.Coli dan Coliform. Pengambilan sampel dilakukan secara periode setiap minggu analisis selama empat minggu. Pengukuran pH dilakukan dengan menggunakan pHmeter dengan nilai pH yang didapatkan berkisar antara 6,58-8,33. Total padatan terlarut (TDS) dianalisis dengan metode gravimetri, nilai yang diperoleh berkisar 70-680 mg/L. Untuk kebutuhan oksigen kimia (COD) dilakukan dengan metode titrasi permanganometri diperoleh nilai berkisar antara 0,2-0,9 mg/L. Kandungan logam besi dilakukan dengan menggunakan spektrofotometri visible dengan panjang gelombang 520 nm, nilai Fe yang didapat berkisar 0,0996-0,1980 mg/L. Tingkat kesadahan total dianalisis dengan metode titrasi kompleksometri nilai yang dihasilkan berkisar 39,8358-302,1114 mg/L. Sementara untuk parameter bakteriologis yaitu bakteri E.Coli dan Coliform dilakukan dengan metode Most Probable Number (MPN) atau angka paling mungkin. Nilai MPN pada E.Coli diperoleh antara 21-240 per 100 mL sampel, sedangkan untuk bakteri Coliform diperoleh nilai berkisar antara 27-240 per 100 mL sampel. Nilai tersebut menunjukkan bahwa kualitas air minum dikategorikan kurang bagus. Berdasarkan hasill pengujian secara total terhadap parameter di atas, dapat diketahui bahwa kualitas air minum di beberapa rumah makan tersebut belum memenuhi kualitas standar yang ditetapkan oleh Menteri Kesehatan Republik Indonesia Nomor 907/MENKES/SK/VII/2002. Kata Kunci : air minum rumah makan, pH, TDS, COD, besi, kesadahan total
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

Abstract

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.
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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (787.28 KB) | DOI: 10.22216/katalisator.v7i2.1705

Abstract

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.
Degradation of Phenol Using Sonolysis and Photolysis by TiO2/RHAC Catalyst and Analysis with Spectrophotometer UV-VIS and HPLC Safni - Safni; Eno Okta Patricia; Trisna Ollinovela; Yulizar Yusuf
al Kimiya: Jurnal Ilmu Kimia dan Terapan Vol 10, No 1 (2023): al Kimiya: Jurnal Ilmu Kimia dan Terapan
Publisher : Department of Chemistry, Faculty of Science and Technology, UIN Sunan Gunung Djati Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/ak.v10i1.24775

Abstract

This study focuses on the degradation of phenol in aqueous solutions using photolysis and sonolysis methods. It investigates the impact of catalyst mass, types of light (UV-A, UV-C, and visible light), types of catalyst (RHAC, TiO2, and TiO2/RHAC), and processing time on phenol degradation. The phenol solutions are analyzed before and after degradation using Spectrophotometer UV-Vis and HPLC. The research aims to understand the factors influencing phenol degradation and provide a basis for further studies to enhance the efficiency of phenol removal. Results show significant improvements in degradation percentages of phenol by using TiO2/RHAC as the catalyst. Sonolysis achieves a degradation of 20.82% with a catalyst, which increases to 50.57% with the catalyst. Photolysis achieves a degradation of 29.06%, which rises to 91.99% with the catalyst. The highest degradation percentage is achieved using UV-A light for 5 hours with a catalyst mass of 30 mg of TiO2/RHAC catalyst. HPLC analysis confirms a decreased phenol concentration and the presence of intermediate compounds. The TiO2/RHAC catalyst demonstrates the promising potential for efficient phenol degradation in aqueous solutions.
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

Abstract

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.
Co-Authors Adlis Santoni Admi Admi Amanda, Ruci Riski Amelia, Fitrah BUSTANUL ARIFIN Diana Sylvia Eno Okta Patricia Fitra Rahmi Fitrah Amelia Fivi Mona Bareno Hamzar Suyani Hermansyah Aziz Hermansyah Aziz Imelda Imelda Indrawati Indrawati Jaslia, Pepi Rahmi Sari Khoiriah Khoiriah Liansari, Oktanora Luh Putu Ratna Sundari Lukman, Umiati Matlal Fajri Alif Mechy Rezita Wahyuni Muhammad Hafiz Reza Norman Ferdinal Novesar Jamarun Novesar Jamarun Nurul Afifah Oktanora Liansari Olly Norita Tetra Putri Julanda Ardica Putri, Ayu Deliana Rahmayeni Rahmayeni Rahmi, Fitra Rahmiana Zein Raihan Hanif Aulia Refilda Refilda Refinel - Ruci Riski Amanda Safni - Safni Safni Safni Safni Safni Savitri, Vivin Firman Siti Zahara Sumaryati Syukur Suryati Suryati Syukri Syukri Tommi Hermansyah Trisna Ollinovela Umiati Lukman Vivin Firman Savitri Wellia, Diana Vanda Yefrida Yefrida Yetria Rilda Zamzibar Zuki Zamzibar Zuki Zilfa Zilfa Zulhadjri Zulhadjri Zulkarnain Chaidir