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All Journal Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Jurnal Ilmu Lingkungan Indonesian Journal of Pharmaceutical Science and Technology EduChemia: Jurnal Kimia dan Pendidikan Jurnal Kelautan Tropis Journal Of Chemical Process Engineering (JCPE) Indonesian Journal of Pure and Applied Chemistry Komunita: Jurnal Pengabdian dan Pemberdayaan Masyarakat
Thamrin Usman
Jurusan Kimia Fakultas Matematika Dan Ilmu Pengetahuan Alam Universitas Tanjungpura
Aerospace Engineering Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Earth & Planetary Sciences Economics, Econometrics & Finance Education Engineering Environmental Science Materials Science & Nanotechnology Medicine & Pharmacology Public Health Social Sciences

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Biodiesel Synthesis of Crude Palm Oil By Using Bifunctional Catalyst Sn/Kaolinite and K2CO3 Noor, Abdullah Yamani; Usman, Thamrin; Wahyuni, Nelly
EduChemia: Jurnal Kimia dan Pendidikan Vol 9, No 2 (2024)
Publisher : Department of Chemistr Education Faculty of Teacher Training and Education Universitas Su

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/educhemia.v9i2.25035

Abstract

The relatively high content of free fatty acids in crude palm oil inhibits the direct synthesis of biodiesel. The use of a bifunctional solid heterogeneous catalyst allows for simultaneous transesterification-esterification reactions and facilitates the purification of the final product from the reaction mixture. This study aimed to synthesize biodiesel from crude palm oil via the use of a Sn-K/metakaolinite catalyst in a simultaneous transesterification-esterification reaction. Biodiesel synthesis was carried out using crude palm oil before and after pretreatment. The optimum conditions were determined by the reaction time (1–5 hours), reactant molar ratio (1:2, 1:4, 1:6, 1:8, 1:10, 1:12), and catalyst concentration (1,3, 5,7 and 9%), and the resulting methyl esters were measured for density, viscosity, and free fatty acids and analyzed via GC‒MS. The results obtained indicate that biodiesel synthesis was successfully carried out with completely converted methyl esters via treated crude palm oil. The optimum conditions for the reaction included a reaction time of 3 hours, a catalyst concentration of 5% and a reactant molar ratio of 1:10. The resulting methyl ester product has a density of 0.86 g/mL, a viscosity of 3.02 cSt and a free fatty acid content of 0.059%. The results of the GC‒MS analysis revealed that the dominant methyl ester components were methyl oleate and methyl palmitate. The synthesis of biodiesel from crude palm oil with a Sn-K/metakaolinite catalyst has been proven to be carried out in simultaneous transesterification-esterification reactions with good catalytic activity.
Adsorpsi Warna Air PDAM secara Kontinu Menggunakan Metakaolin Thamrin Usman; Nelly Wahyuni; M. Ilham Ramadani; Devina Dwi Julianty Nainggolan; Ismail Astar
Jurnal Ilmu Lingkungan Vol 22, No 6 (2024): November 2024
Publisher : School of Postgraduate Studies, Diponegoro Univer

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jil.22.6.1554-1561

Abstract

Pasokan air gambut ke Sungai Kapuas dan Sungai Landak dapat berimplikasi signifikan terhadap kualitas air baku seperti kekeruhan, warna dan pH air yang tidak memenuhi standar. PDAM Khatulistiwa Pontianak memanfaatkan air Sungai Kapuas dan Sungai Landak sebagai air baku sehingga menyebabkan kualitas air yang dihasilkan seperti nilai warna sebesar 315-790 TCU, kekeruhan 34-86 NTU dan pH 6,09 -6,45 tidak memenuhi standar PERMENKES No.492/MENKES/X/2010. Penelitian ini bertujuan untuk menurunkan nilai kekeruhan, warna dan pH dari air baku PDAM Pontianak menggunakan metakaolin. Metakaolin tersusun oleh silika sebesar 56,405% dan alumina sebesar 31,569%. Hasil analisis GSA menunjukkan bahwa metakaolin memiliki luas permukaan sebesar 22,38 m2/g; total volume pori sebesar 0,079 cm3/g dan ukuran rata-rata pori sebesar 7,12 nm, dan ketika telah jenuh digunakan luas permukaan kaolin akan berubah menjadi 34,56 m2/g; total volume pori sebesar 0,090 cm3/g dan ukuran rata-rata pori sebesar 5,24 nm. Metakaolin dapat menghilangkan warna air gambut dengan penggunaan metakaolin sebesar 0,090g dan hasil warna air 1 TCU, turbidity 0,6 NTU dan pH 4-5, serta penggunaan metakaolin pada sistem kontinu dengan debit air 1 liter/90 detik dengan waktu kontak 1 menit efektif digunakan hingga 24 jam dalam meningkatkan kualitas air PDAM hingga memenuhi baku mutu.
Pelatihan Penggunaan Aplikasi Pendukung Publikasi Karya Tulis Ilmiah untuk Peningkatan Kompetensi Guru Kimia Sekolah Menengah Umum di Kabupaten Kubu Raya Andi Hairil Alimuddin; Endah Sayekti; Gusrizal Gusrizal; Ajuk Sapar; Rudiyansyah Rudiyansyah; Titin Anita Zahara; anis shofiyani; Nelly Wahyuni; Thamrin Usman; Risa Nofiani; Ari Widiyantoro; Agus Wibowo; Warsi Kurnia Rahayu; Yoga Pratama; Titik Lestari; Tria Susanti; Tariz Zharfan ME; Aderiya Munika
KOMUNITA: Jurnal Pengabdian dan Pemberdayaan Masyarakat Vol 5 No 2 (2026): Mei
Publisher : PELITA NUSA TENGGARA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.60004/komunita.v5i2.595

Abstract

A workshop on the use of supporting applications for the publication of scientific papers has been carried out for Chemistry subject teachers. This activity is in collaboration with the Chemistry Subject Teachers' Conference (MGMP) of Kubu Raya Senior High Schools. This activity aims to utilize the application for compiling bibliographies and checking the similarity of scientific papers to facilitate the writing and publication of scientific papers. The method of implementing the Community Service (PKM) program is through: structural, participatory and instructional approaches; demonstration; practice and mentoring, and evaluation. The results obtained in the form of implementing a one-day workshop activity by presenting research method materials, library search tips and utilization of the Mendeley application, plagiarism checking applications and tips for avoiding plagiarism.The workshop was conducted in the form of a presentation and direct practice of using the application. In addition to being accompanied by the presenters, participants are also accompanied by instructors who have been prepared by the committee so that the activity can run smoothly. In order to increase the interest and attention of participants to participate in the activity, the organizing committee provides door prizes for participants who ask and answer quizzes from the presenters. This method can also be used as an evaluation of the level of understanding of participants in addition to the evaluation in the form of questionnaires distributed after the activity to measure the success of this PKM activity. Based on the questionnaires distributed, participants thought that this activity was very helpful in compiling scientific papers so that it was very useful for participants. Most participants considered that the facilities and training time were in accordance with those conveyed by the presenters who were in accordance with their fields. Overall, it can be concluded that the objectives of implementing this PKM have been achieved.
Co-Authors Aderiya Munika Agus Wibowo Ajuk Sapar Andi Hairil Alimuddin Ari Widiyantoro Devina Dwi Julianty Nainggolan Dwi I. Prayitno Endah Sayekti Esi Amelyanti Fajar Nugraha Fajriaty, Inarah Gusrizal Gusrizal Hadi Kurniawan Hamdil Mukhlishin Imelda Hotmarisi Silalahi Ismail Astar M Syahwandi M. Ilham Ramadani Mauludia Mauludia Nelly Wahyuni Nelly Wahyuni Nia Dahlia Nimas Ade Kusdayanti Noor, Abdullah Yamani Norvi Fatmawati Prayitno, Dwi Imam Risa Nofiani Rudiyansyah Rudiyansyah Septiani Septiani Shofiyani, Anis Siti Nani Nurbaeti Tariz Zharfan ME Titik Lestari Titin Anita Zahara Titin Anita Zahara Titin Anita Zahara Tria Susanti Uray Amira Naselia Utin Widiatannur Wahyuni, Nelly Warsi Kurnia Rahayu Winda Rahmalia Yoga Pratama