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All Journal Jurnal Crystal : Publikasi Penelitian Kimia dan Terapannya Jurnal Jejaring Matematika dan Sains Journal Evaluation in Education (JEE)
Mahirullah
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Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Education Mathematics Physics Social Sciences Other

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Pengaruh Ukuran Partikel Serbuk Kalsium Oksida (CaO) Sebagai Adsorben Untuk Meningkatkan Kadar Etanol Teknis: Pengaruh Ukuran Partikel Serbuk Kalsium Oksida (CaO) Sebagai Adsorben Untuk Meningkatkan Kadar Etanol Teknis Lamuru, Afrianti S; Mahirullah; Juita , Sri
Jurnal Jejaring Matematika dan Sains Vol. 5 No. 1 (2023): Jurnal Jejaring Matematika dan Sains
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Palangka Raya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36873/jjms.2023.v5.i1.801

Abstract

The research studied method of increasing technical alcohol levels by using Calcium Oxide (CaO) adsorbent in adsorption distillation. Alcohol can be used as an alternative fuel or fuel additive to increase the octane number of the fuel so as to produce low carbon emissions. So, it is very important alcohol purification. One method for purifying alcohol is adsorption distillation. The purpose of this study was to determine the effect of the particle size of CaO adsorbent powder in the adsorption distillation method. The ethanol used as feed is ethanol of 70% and 96%. The results showed the increase in ethanol content with a particle size of 100 mesh, 150 mesh and 200 mesh, the highest final ethanol content was obtained at a particle size of 200 mesh, where at an initial concentration of 70% ethanol after the adsorption process increased to 88.50%, while the ethanol content the lowest was obtained at 100 mesh with a final content of 87%. Likewise, the initial concentration of 96% ethanol after the adsorption process increased to 98.25% at a particle size of 200 mesh, while the lowest concentration was obtained at a particle size of 100 mesh with a final grade of 97.90%. From the results of the study showed that particle size greatly influences the increase in ethanol content. The smaller the particle size used, the greater the adsorption speed. The smaller the particle size, the greater the surface area, so that more water is absorbed and the resulting ethanol concentration is greater.
PEMBUATAN KARBON AKTIF DARI CANGKANG BUAH KARET MELALUI KARBONASI SUHU 600ºC DENGAN AKTIVATOR KOH Diana Novitasari; S. Lamuru, Afrianti; Mahirullah
Jurnal Crystal : Publikasi Penelitian Kimia dan Terapannya Vol. 6 No. 1 (2024): Publikasi Penelitian Kimia
Publisher : Program Studi Kimia, Fakultas MIPA, Universitas PGRI Banyuwangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36526/jc.v6i1.3085

Abstract

Penelitian ini bertujuan untuk mengetahui kondisi optimum konsentrasi aktivator KOH dari karbon aktif cangkang buah karet dan kualitasnya. Proses karbonisasi karbon aktif dilakukan dengan menggunakan alat furnace dengan suhu 600ºC. Sampel yang digunakan dalam penelitian adalah cangkang buah karet klon PB 260 yang terdapat di perkebunan Indralaya Palembang. Penelitian ini terdiri beberapa tahap yaitu tahap persiapan sampel, karbonisasi, aktivasi, dan karakterisasi karbon aktif. Aktivator yang digunakan adalah larutan KOH dengan variasi konsentrasi 5, 10, 15, dan 20%. Hasil penelitian menunjukkan bahwa kondisi optimum konsentrasi aktivator KOH yang diperoleh sebesar 15%. Rendemen karbon aktif kondisi optimum yang dihasilkan 68,4600%. Karakterisasi karbon aktif pada kondisi optimum diperoleh kadar air 1,5876%, kadar zat menguap 38,5436%, kadar abu 3,3800%, dan kadar karbon terikat 58,0774%. Hasil karakterisasi karbon aktif kondisi optimum juga menunjukan daya serap terhadap iodin 243,3406 mg/g, daya serap terhadap metilen biru 19,0822 mg/g, dan daya serap terhadap benzen 10,0300%. Karbon aktif yang memenuhi kualitas ialah uji kadar air dan kadar abu, sedangkan daya serap karbon aktif tidak memenuhi kualitas dalam penyerapan iodin, metilen biru dan benzene sehingga perlu untuk menggunakan aktivator lain dalam pembuatan karbon aktif dengan cangkang buah karet.
Analisis Penerapan dan Korelasi Model Pembelajaran Kolaboratif Tipe Pembunuhan Terhadap Hasil Belajar Siswa SMA Jambi Sri Muslimatul Husna; Mahirullah; Farida Adriani
Journal Evaluation in Education (JEE) Vol 4 No 1 (2023): Januari
Publisher : Cahaya Ilmu Cendekia Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37251/jee.v4i1.293

Abstract

Purpose of the study: This study aims to determine the applicability of the MURDER type collaborative learning model and the relationship between the implementation of this model on student learning outcomes. Methodology: The design used in this study is the Mix Method. Sampling was carried out by purposive sampling in senior high school 4 Jambi City. The instrument used is the observation sheet and questions. Before the test was carried out, the questions were tried to determine the validity, difficulty level, discriminating power, and reliability of the questions. The prerequisite test used normality and homogeneity tests, while the analysis used Bivariate and Pearson correlation. Main Findings: The results of this study indicate that the implementation of the model by teachers and students through qualitative results is exemplary, with an average quantitative result each for teachers is 78.125% and for students is 70.29%, followed by an average student learning outcomes that reach 75,26. The result of the correlation test is R = 0.717 with a significance value of 0.000 <0.05, which means that there is a significant correlation, while the contribution of the R Square value is 0.514, which means that the implementation of the MURDER type collaborative learning model, contributes to Learning Outcomes of 51.4 %. Novelty/Originality of this study: The novelty of this study is the focus on analyzing the application of the MURDER type collaborative learning model and determining its correlation to student learning outcomes at senior high school 4 Jambi City on the subject of reaction rates.
Co-Authors Diana Novitasari Farida Adriani Juita , Sri Lamuru, Afrianti S S. Lamuru, Afrianti Sri Muslimatul Husna