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All Journal JURNAL KIMIA SAINS DAN APLIKASI Indonesian Physical Review Journal of Coastal and Deep Sea Jurnal Rekayasa Proses
Tri Haryono
Balai Taman Nasional Alas Purwo, Banyuwangi
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Decision Sciences, Operations Research & Management Education Engineering Environmental Science Immunology & microbiology Physics

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Efektivitas Probiotik Lactobacillus rhamnosus untuk Pertumbuhan dan Kualitas Air Budidaya Ikan Badut Premnas epigramma Kartamiharja, Ujang Komarudin A; Yulianti, Yuli; Dharmawati, Verli; Irianti, Valentina Retno; Haryono, Tri; Nazar, Fitrina
Journal of Coastal and Deep Sea Vol 3 No 1 (2025): Journal of Coastal and Deep Sea
Publisher : Pattimura University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/jcds.v3i1.17847

Abstract

Penerapan probiotik cair Lactobacillus rhamnosus dalam pemeliharaan ikan badut (Premnas epigramma) bertujuan untuk menentukan dosis efektif pemberian probiotik terhadap pertumbuhan dan kualitas air media pemeliharaan. Ikan badut dipelihara dalam akuarium 60 L dengan kepadatan 2-3 ekor per liter selama 42 hari pemeliharaan. Perlakuan diferensiasi dengan dosis probiotik cair 0 mL; 5 mL; 10 mL per 50 liter air laut. Hasil penelitian menunjukkan bahwa pertambahan berat ikan pada dosis probiotik 0 mL, 5 mL, dan 10 mL adalah 0,23 g, 0,33 g, dan 0,32 g, secara berturut-turut. Terdapat efek positif pemberian probiotik terhadap perubahan warna kulit ikan yang menjadi lebih cerah. Parameter kualitas air pemeliharaan Premnas epigramma seperti suhu, salinitas, pH, dan DO yang diamati selama percobaan masih sesuai untuk budidaya ikan laut. Konsentrasi nitrit dalam air menurun pada kedua perlakuan dengan penambahan probiotik, tetapi amonia menurun menjadi 0,1 mg/L hanya pada dosis probiotik 5 mL per 50 mL air laut. Pemberian probiotik selama pemeliharaan ikan badut belum terlalu efektif menekan populasi bakteri Vibrio pigmen hijau. Akan tetapi dapat menekan populasi Vibrio pigmen kuning yang cenderung patogen.
Pengaruh variasi suhu dan waktu pemanasan terhadap struktur kristal, komposisi kimia, morfologi dan kadar logam pada sintesis nanopartikel ZnO menggunakan metode hidrotermal Hardiantika, Widya; Suprihatin; Astuti, Widi; Haryono, Tri; Eskani, Istihanah Nurul
Jurnal Rekayasa Proses Vol 17 No 1 (2023): Volume 17, Number 1, 2023
Publisher : Jurnal Rekayasa Proses

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jrekpros.77190

Abstract

Sintesis nanopartikel ZnO dari limbah industri baja telah dilakukan menggunakan metode hidrotermal. Penelitian ini bertujuan untuk mengetahui pengaruh suhu (120, 150 dan 200°C) dan waktu pemanasan (1, 3, dan 6 jam) terhadap komposisi kimia, struktur kristal, ukuran partikel dan morfologi dari produk ZnO yang dihasilkan. Karakterisasi yang digunakan ialah Inductively Coupled Plasma-Optical Emission Spectrometry (ICP-OES), X-Ray Fluoresence (XRF) X-Ray Diffraction (XRD) dan Scanning Electron Microscopy (SEM). Proses hidrotermal menghasilkan produk nanopartikel dengan kemurnian tinggi dan ukuran partikel < 100nm dengan suhu hidrotermal yang optimum adalah 150oC selama waktu penahanan 3 jam. Dari hasil karakterisasi XRF diketahui bahwa kadar Zn adalah yang paling dominan yaitu sebesar 98,434%. Selanjutnya, pada karakterisasi XRD diperoleh fasa murni ZnO yaitu zincite dengan nilai 2θ sebesar 36,23° dan ukuran partikel sebesar 33,36 nm dengan morfologi yang terbentuk batang heksagonal (nanorods) seperti yang diperoleh pada karakterisasi FE-SEM.
ECO FRIENDLY CITRIC ACID-ASSISTED SOL-GEL SYNTHESIS OF HIGH-PURITY NANO SILICA FROM DIENG GEOTHERMAL SLAG: CHARACTERIZATION AND OPTIMIZATION METHOD Birawidha, David C; Manaf, Azwar; Astuti, Widi; Daulay, Amru; Haryono, Tri; Sari, Yuliana; Suprihatin, Suprihatin
Indonesian Physical Review Vol. 8 No. 2 (2025)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ipr.v8i2.486

Abstract

Geothermal slag is a by-product of the geothermal power generation process, but its added value is minimal. With a silica content of up to 70%, geothermal slag has potential as a secondary silicon source for battery silicon anode precursors. Usually, the synthesis of nano-silica was carried out through the sol-gel method, in which HCl is usually used as a modifier to regulate the physical and chemical properties of the material. But in this study chose citric acid for modifier agent because it is more environmentally friendly. The challenge of using citric acid is the formation of carbon-based salts that can cause silica blackening if not washed well. Therefore, optimization was done by adjusting the pH to produce high-purity nano-silica. The sol-gel process was carried out by adding 10% NaOH and 5N Citric Acid, with varying pH base conditions from 8 to 11. XRF analysis results showed the highest purity at pH 8. Impurities were still visible based on XRD data, and the formation of nanoparticles was confirmed through morphological analysis using FESEM and TEM where the average particle size formed is between 55 nm.
Enhanced Bio-Oil Production from Agricultural Waste via NiCl₂-Assisted Pyrolysis: A Comparative Study of Candlenut and Coffee Shells Wulandari, Yeni Ria; Firmansyah, Muhammad Arif; Variyana, Yeni; Haryono, Tri; Sukma, Vinda Avri; Sudibyo, Sudibyo; Purwanto, Nurjan Didik
Jurnal Kimia Sains dan Aplikasi Vol 29, No 2 (2026): Volume 29 Issue 2 Year 2026 (In Press)
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jksa.29.2.119-131

Abstract

Indonesia’s limited fossil fuel reserves, coupled with increasing national energy demand, highlight the need for alternative and renewable fuel sources. Biomass-derived bio-oil produced through pyrolysis represents a promising solution that can both reduce dependence on petroleum-based fuels and mitigate environmental pollution from underutilized biomass waste. This study investigates the production of bio-oil from candlenut shells and coffee shells through pyrolysis at varying temperatures (250, 350, and 450°C), conducted with and without a NiCl2 catalyst. The bio-oil was characterized for yield, density, and viscosity. The highest bio-oil yields from non-catalytic pyrolysis were achieved at 450°C, amounting to 39.14% for candlenut shells and 41.80% for coffee shells. Catalytic pyrolysis using NiCl2 enhanced the bio-oil yield, producing up to 55.78% (candlenut shells at 450°C) and 58.05% (coffee shells at 350°C). Density measurements showed the highest values in catalytic pyrolysis at 250°C, while the lowest densities were observed in non-catalytic pyrolysis at 450°C. Viscosity followed a similar trend, decreasing with increasing temperature and the presence of the catalyst. FTIR analysis confirmed the presence of functional groups including C–O, C=O, C=C, C≡C, C–H, and O–H. Overall, this study demonstrates the potential of candlenut and coffee shell waste as feasible feedstocks for bio-oil production, offering alternative renewable energy sources for future applications.
Co-Authors Azwar Manaf Birawidha, David C Daulay, Amru Dharmawati, Verli DIDIK PURWANTO Firmansyah, Muhammad Arif Hardiantika, Widya Irianti, Valentina Retno Istihanah Nurul Eskani, Istihanah Nurul Kartamiharja, Ujang Komarudin A Nazar, Fitrina Ria Wulandari Sudibyo Sudibyo Sukma, Vinda Avri Suprihatin Suprihatin Suprihatin Variyana, Yeni Widi Astuti Yuliana Sari Yulianti, Yuli