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PENGARUH KONSENTRASI CUKA KAYU DARI TEMPURUNG KELAPA TERHADAP KUALITAS IKAN GABUS (Ophiocephalus striatus) Jelita, Rinny
Jurnal Riset Industri Hasil Hutan Vol 4, No 1 (2012)
Publisher : Kementerian Perindustrian

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (127.544 KB)

Vinegar wood is a mixture of solutions and dispersions of wood smoke from the pyrolysis. Pyrolysiswas doneat temperature of300oCfor 8hours and thesnake headfishpreservation processwas done bysoakingat vinegar woodconcentrationof 25%, 50% and 75% for 5minutes. Furthermorethe moisture of snake headfish was decreased before stored insealedjarsfor storage time during 1week, 2 weeksand 3weeks.The results showedthat therelative concentration ofphenol, aceticacid and carboxaldehydein coconut shellvinegar wood respectively by 21,65%; 47,90% and 4,54%. The moisture ofsnake headfish that storedfor 1weekwithvinegar woodconcentrationof 25%, 50%, and 75% respectively by60.7%, 66.67%, 67.8%and the moisture that storedfor 2and 3weeks respectively by67.5%, 69.76%, 72.09%, 72.41%, 73.91%, 72.22%. Protein of snake headfish that storedfor 1weekwithvinegar woodconcentrationof 25%, 50%, and 75% respectively by 10.93%, 70.8%, 9.95% and the protein that storedfor 2and 3weeksrespectively by7.07%, 7.05%, 6.99%, 4.55%, 6.49%, 6.79%. Number ofE.coli in snake head fish that storedfor 1weekwithvinegar woodconcentrationof 25%, 50%, and 75% respectivelyby 15APM/g, < 3APM/g, < 3APM/gand the number of E.coli that storedfor 2and 3weeksrespectively by240APM/g, 39 APM/g, < 3APM/g, >2400APM/g, 210 APM/g, < 3APM/g.Keywords: coconut shell, pyrolysis, vinegar wood, preservation, snake head fish

PENGARUH KONSENTRASI CUKA KAYU DARI TEMPURUNG KELAPA TERHADAP KUALITAS IKAN GABUS (Ophiocephalus striatus) Jelita, Rinny; Hadi, Abdul; Tuhuloula, Abubakar
Jurnal Riset Industri Hasil Hutan Vol 4, No 1 (2012)
Publisher : Kementerian Perindustrian

Vinegar wood is a mixture of solutions and dispersions of wood smoke from the pyrolysis. Pyrolysiswas doneat temperature of300oCfor 8hours and thesnake headfishpreservation processwas done bysoakingat vinegar woodconcentrationof 25%, 50% and 75% for 5minutes. Furthermorethe moisture of snake headfish was decreased before stored insealedjarsfor storage time during 1week, 2 weeksand 3weeks.The results showedthat therelative concentration ofphenol, aceticacid and carboxaldehydein coconut shellvinegar wood respectively by 21,65%; 47,90% and 4,54%. The moisture ofsnake headfish that storedfor 1weekwithvinegar woodconcentrationof 25%, 50%, and 75% respectively by60.7%, 66.67%, 67.8%and the moisture that storedfor 2and 3weeks respectively by67.5%, 69.76%, 72.09%, 72.41%, 73.91%, 72.22%. Protein of snake headfish that storedfor 1weekwithvinegar woodconcentrationof 25%, 50%, and 75% respectively by 10.93%, 70.8%, 9.95% and the protein that storedfor 2and 3weeksrespectively by7.07%, 7.05%, 6.99%, 4.55%, 6.49%, 6.79%. Number ofE.coli in snake head fish that storedfor 1weekwithvinegar woodconcentrationof 25%, 50%, and 75% respectivelyby 15APM/g, < 3APM/g, < 3APM/gand the number of E.coli that storedfor 2and 3weeksrespectively by240APM/g, 39 APM/g, < 3APM/g, >2400APM/g, 210 APM/g, < 3APM/g.Keywords: coconut shell, pyrolysis, vinegar wood, preservation, snake head fish

Karbon Aktif dari Limbah Sawi Putih untuk Adsorpsi Ion Mangan (Mn) Jefriadi, Jefriadi; Jelita, Rinny; Nurhaliza; Nailisa, Nur
Jurnal Teknologi Agro-Industri Vol. 12 No. 1 (2025): Jurnal Teknologi Agro-Industri
Publisher : Pusat Penelitian dan Pengabdian Kepada Masyarakat, Politeknik Negeri Tanah Laut

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34128/jtai.v12i1.236

Pencemaran air oleh logam berat mangan (Mn) merupakan masalah serius di berbagai wilayah perairan. Salah satu metode yang efektif untuk menurunkan konsentrasi logam berat ini adalah melalui proses adsorpsi menggunakan karbon aktif. Penelitian ini memanfaatkan limbah sawi putih (Brassica pekinensia L.) sebagai bahan baku karbon aktif yang dihasilkan melalui pirolisis pada suhu 400 °C selama 1 jam, kemudian diaktivasi menggunakan larutan HCl 1N. Pengaruh variasi waktu kontak (0, 30, 60, 90, dan 120 menit) dan massa adsorben (0,2–1,0 gram) terhadap efisiensi dan kapasitas adsorpsi ion Mn dianalisis. Hasil penelitian menunjukkan bahwa karbon aktif memiliki kadar air 11,09%, sesuai standar SNI 06-3730-1995. Waktu kontak optimum untuk adsorpsi ion Mn adalah 90 menit, dengan efisiensi 64,7% dan kapasitas adsorpsi 6,47 mg/g. Variasi massa adsorben optimum 1,0 gram menghasilkan efisiensi tertinggi 68,37% dan kapasitas adsorpsi 5,12 mg/g. Hasil ini menunjukkan bahwa karbon aktif dari limbah sawi putih memiliki potensi yang baik sebagai adsorben untuk penyerapan ion logam Mn.

Insight into Aluminum Leaching with Microwave from Peat Clay: A Comparative Kinetic Study of SC and BIC Models Mirwan, Agus; Hairullah; Jelita, Rinny; Jefriadi; Putra, Meilana Dharma; Ilmanto, Bintang Hambela; Putri, Hexas Sarastiwi Handayani; Ulum, Muhammad Bahrul; Haka, Muhammad Rofi; Darmawan, Muhammad Arif
Communications in Science and Technology Vol 10 No 2 (2025)
Publisher : Komunitas Ilmuwan dan Profesional Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21924/cst.10.2.2025.1850

The depletion of bauxite reserves has prompted the research of various types of soil as alternative sources of aluminum, such as the peat clay used in this study. The complexity of the minerals requires a more efficient leaching methods, while microwave-based leaching offers a potential approach through rapid and uniform heating. This study examines the effect of microwave power, HCl concentration, operating temperature, and particle size on the leaching efficiency of aluminum from peat clay soil. The leaching process was modeled using two approaches, namely the shrinking core (SC) model and the broken-intact cell (BIC) model under pseudo-steady state conditions. The results showed that increasing HCl concentration, microwave power, and temperature accelerated leaching, while increasing particle size decreased leaching efficiency. Optimum conditions were achieved at 4 M HCl concentration, 100 W power, 40 °C temperature, and 0.0074 cm particle size. The shrinking core (SC) model showed better fit under most conditions, while the intact-broken cell (BIC) model was more accurate at lower temperatures and particle sizes. The simulation results showed that the most suitable parameter values in the SC model were De = 0.0049 cm2/s, k = 10.5 cm/s, and kc = 2.49 cm/s, while in the BIC model De = 0.04808 cm2/s and K = 0.02689 g/cm3 were obtained. These results confirm the superiority of the SC model in representing microwave-based leaching mechanisms in general, while the BIC model provides additional insights under diffusion-limited conditions. Process Performance Index (PPI) analysis showed that optimum conditions were achieved at 4 M HCl and 40 °C, but lower acid concentrations also yielded competitive PPI. This confirms that leaching effectiveness is determined by a combination of alumina recovery and reagent consumption efficiency. These findings contribute to the development of leaching kinetics models and the optimization of more efficient and energy-saving aluminum extraction processes.

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