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All Journal HAYATI Journal of Biosciences Jurnal Pengolahan Hasil Perikanan Indonesia JURNAL KIMIA SAINS DAN APLIKASI INDONESIAN JOURNAL OF APPLIED PHYSICS ALCHEMY Jurnal Penelitian Kimia Jurnal Kimia Terapan Indonesia Indonesian Journal of Chemistry Jurnal Sains Terapan : Wahana Informasi dan Alih Teknologi Pertanian LEMBARAN PUBLIKASI MINYAK DAN GAS BUMI JURNAL REKAYASA KIMIA & LINGKUNGAN
Komar Sutriah
Department Of Chemistry, FMIPA, IPB University Jalan Tanjung Kampus IPB, Dramaga, Babakan, Dramaga, Bogor, Jawa Barat, 16680, Indonesia
Agriculture, Biological Sciences & Forestry Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Earth & Planetary Sciences Economics, Econometrics & Finance Energy Engineering Environmental Science Materials Science & Nanotechnology Physics Social Sciences Veterinary

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Quantitative Structure-Activity Relationship Study of Fatty Acid Derivatives as Lubricant Additive Sugesti, Rahmawita; Sutriah, Komar; Khotib, Mohammad
Jurnal Rekayasa Kimia & Lingkungan Vol 19, No 1 (2024): Jurnal Rekayasa Kimia & Lingkungan (June 2024 )
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23955/rkl.v19i1.27374

Abstract

Fatty acid compounds and their derivatives have been known in tribology as a source of bio-lubricant raw materials. New compounds were developed computationally to sort out the physical properties of the desired lubricant additive before synthesis in the laboratory. In this study, the correlation between the chemical structure of fatty acid derivative compounds and their physical properties through the quantitative structure-activity relationship (QSAR) using the density functional theory (DFT) was determined. QSAR model resulted in two linear regression equations for the wear rate performance test at (1) the value of the weld load with 5%, 500N variation and (2) the value of the wear scar diameter 5%, 150N variation. Validation of the regression model was conducted using the leave-one-out (LOO) method. The new additive lubricants were designed using the obtained QSAR models of the wear rate performance test with the descriptor of total energy, dipole moment, and softness. Stearoyl diethanolamine compound was proposed as a lubricant additive with the best performance parameter of weld load and wear scar diameter at 298.03 kg and 0.29 mm respectively. The percentage performance of stearoyl diethanolamine for weld load and wear scar diameter was increased by 24.18% and 47.60%, respectively.
Adsorption of Methylene Blue by Graft Copolymer Acrylamide onto Pineapple Peel Cellulose with the Addition of Activated Carbon Microwave-Assisted Permatasari, Putri; Sutriah, Komar; Khotib, Mohammad
Jurnal Rekayasa Kimia & Lingkungan Vol 18, No 1 (2023): Jurnal Rekayasa Kimia & Lingkungan (June, 2023 )
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23955/rkl.v18i1.26894

Abstract

Cationic dyes such as methylene blue are among the most widely used dye in the textile and paper industry. The dye waste produced causes environmental pollution and is harmful to human health. Thus, wastewater treatment becomes an important aspect of reducing this problem. Adsorption is a very effective method for treating various wastewaters due to its high selectivity and capacity. This study aims to prepare an adsorbent from graft copolymer acrylamide onto cellulose with the addition of activated carbon microwave-assisted and to test its performance as an adsorbent for methylene blue. The adsorbent synthesis was carried out using a microwave-assisted graft copolymer technique. The graft of acrylamide onto cellulose with the addition of activated carbon was carried out at various times (3, 4, and 5 minutes). Based on the FTIR spectra characterization of the adsorbent, the functional groups are C=O and N-H, and SEM analysis shows that the surface forms an interconnected network. At 3, 4, and 5 minutes of irradiation, grafting ratios were 329.72, 128.00, and 150.12, with grafting efficiency of 99.74, 72.94, and 78.02%. The maximum adsorption capacity of the adsorbent on methylene blue was 14.00, 6.04, and 9.97 mg/g, respectively, following the Langmuir isotherm model and pseudo second order kinetics. The experimental results show that the adsorbent can effectively remove or eliminate methylene blue in an aqueous solution.
Synthesis and Characterization of HDTMA-Br Modified TiO₂/ZnO/CuO Photocatalyst Composite for Photodegradation of Textile Dye (Methyl Orange) Fatika, Siti; Sutriah, Komar; Khotib, Mohammad
Jurnal Kimia Sains dan Aplikasi Vol 28, No 8 (2025): Volume 28 Issue 8 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.28.8.436-441

Abstract

Methyl orange exhibits low biodegradability and is difficult to remove from aqueous solutions. Photodegradation using photocatalysts offers an efficient and practical alternative for treating methyl orange dye waste. Among various semiconductor materials, TiO₂ and ZnO have attracted considerable attention due to their strong photocatalytic activity. However, excessive use of TiO₂ can lead to turbidity in the solution, reducing light penetration and consequently diminishing the efficiency of the photoreduction and photooxidation processes. Numerous studies have been conducted to control the structure, morphology, and porosity of TiO₂ to enhance its photocatalytic performance. One effective approach involves the incorporation of surfactants into composites, which can modify the optical properties, structure, and morphology of the material, thereby improving its ability to degrade methyl orange. In this study, the composite was synthesized using the precipitation method. The highest degradation efficiency of 44% was achieved at 50 minutes for a methyl orange concentration of 30 mg/L, with a composite ratio of 1:1:0.3 and an HDTMA-Br concentration of 2 CMC. The addition of HDTMA-Br enhanced the photocatalytic performance by reducing electron–hole recombination, resulting in a band gap energy of 2.87 eV within the visible light range (1.77–3.1 eV).
Kinetika dan termodinamika komposit HAp-Fe3O4 dari cangkang tutut (Bellamya javanica) sebagai adsorben Pb(II) pada limbah akumulator: Kinetics and thermodynamics of HAp–Fe₃O₄ composite from tutut snail shell (Bellamya javanica) as Pb (II) adsorbent in battery wastewater Iswara, Muhammad Dicky; Sutriah, Komar; Charlena, Charlena
Jurnal Pengolahan Hasil Perikanan Indonesia Vol. 28 No. 11 (2025): Jurnal Pengolahan Hasil Perikanan Indonesia 28(11)
Publisher : Department of Aquatic Product Technology IPB University in collaboration with Masyarakat Pengolahan Hasil Perikanan Indonesia (MPHPI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17844/gczc9396

Abstract

Peningkatan jumlah kendaraan listrik dan perkembangan industri otomotif telah menyebabkan akumulasi limbah akumulator bekas yang mengandung logam berat berbahaya, khususnya Pb(II). Jika tidak ditangani dengan baik, limbah ini dapat mencemari lingkungan dan membahayakan kesehatan manusia dan ekosistem. Adsorpsi menggunakan material berbasis hidroksiapatit (HAp) menjadi salah satu metode penanganan yang efektif. Cangkang tutut (Bellamya javanica), limbah biomineral yang kaya akan kalsium karbonat (CaCO3) berpotensi dimanfaatkan sebagai prekursor kalsium pada sintesis HAp. Penelitian ini bertujuan menentukan kondisi optimum pada pH, waktu, suhu, dan konsentrasi komposit HAp-Fe3O4 sebagai adsorben ion timbal Pb(II), menentukan seberapa efisien adsorben komposit HAp-Fe3O4 dalam mengadsorpsi ion timbal, menentukan parameter kinetika dan termodinamikanya dalam proses adsorpsi, serta memberikan solusi material ramah lingkungan dan berkelanjutan yang dapat diimplementasikan untuk mengurangi kandungan logam berat pada lingkungan yang dihasilkan dari limbah akumulator. Komposit disintesis melalui metode deposisi kimia. Hasil karakterisasi menunjukkan struktur berpori dengan luas permukaan 3002 m2/g, ukuran pori 2,21 nm, dan volume pori 3,32 cc/g. Optimasi menunjukkan kondisi optimum pada pH 6, waktu kontak 50 menit, suhu 25°C, dan konsentrasi awal 10 ppm. Studi kinetika mengikuti model pseudo-order-dua (K2 = 2,23 g/mg·menit), mengindikasikan adsorpsi kimia. Parameter termodinamika ( ΔG°<0, ΔH°<0, ΔS°>0) menunjukkan proses spontan, eksoterm, dan disertai peningkatan entropi. Model isoterm Freundlich menunjukkan kesesuaian terbaik (1/n = 0,82; KF = 467). Aplikasi terhadap limbah akumulator menunjukkan efisiensi adsorpsi 99,23%, menurunkan Pb(II) dari 2,28 ppm menjadi 0,017 ppm, sesuai baku mutu Permen LH No. 5 Tahun 2014. Komposit ini menunjukkan potensi tinggi sebagai adsorben logam berat yang efektif dan berkelanjutan.
Co-Authors . TRIVADILA Charlena Denar Zuliandanu Dodi Irwandi Dyah Iswantini Eko Prasetyo Fatika, Siti Gustini Syahbirin Hestuti Eni Hestuti Eni Iswara, Muhammad Dicky M. Syamsul Maarif Mohammad Khotib Muhammad Khotib Muljani, Sri Muljani, Sri Nina Hartati Obie Farobie Putri Permatasari Putri Permatasari, Putri Rut Novalia Rahmawati Sianipar Shabrina Shabrina Silvia Devi Eka Putri Sri Mulijani Sri Muljani Sugesti, Rahmawita SUMINAR SETIATI ACHMADI Tetty Kemala Tun Tedja Irawadi Tun Tedja Irawadi Zainal Alim Mas&#039;ud Zainal Alim Mas’ud Zainal Alim Mas’ud Zainal Alim Mas’ud