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All Journal Reaktor Jurnal Teknik Kimia Jurnal Fisika Unand JURNAL INTEGRASI PROSES Journal of Natural Sciences and Mathematics Research Konversi Jurnal Kimia Riset CHEESA: Chemical Engineering Research Articles Reka Buana : Jurnal Ilmiah Teknik Sipil dan Teknik Kimia International Journal of Economics, Business and Accounting Research (IJEBAR) Jurnal Inovasi Teknik Kimia ASEAN Journal of Community Engagement G-Tech : Jurnal Teknologi Terapan Nusantara Science and Technology Proceedings International Journal of Eco-Innovation in Science and Engineering (IJEISE) Equilibrium Journal of Chemical Engineering Jurnal Altifani Penelitian dan Pengabdian kepada Masyarakat AJARCDE (Asian Journal of Applied Research for Community Development and Empowerment) Jurnal Pengbdian Teknik Mesin Journal Serambi Engineering (JSE) Algoritma: Jurnal Matematika, Ilmu Pengetahuan Alam, Kebumian dan Angkasa JURNAL REKAYASA KIMIA & LINGKUNGAN
SRIE MULJANI
Program Studi Teknik Kimia, Fakultas Teknik & Sains, Universitas Pembangun Nasional “Veteran” Jawa Timur, Surabaya
Religion Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Nursing Physics Public Health Social Sciences Other

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Electrospun PLA/Cellulose/Chitosan/PEG Nanofibers for Wound Dressing: Effects of Composition and Feed Rate Shofiyah; Syis Muhim; Muljani, Srie; Tri Widjaja; Rohmah, Aisyah Alifatul Zahidah; ari, Citra Yulia S
AJARCDE (Asian Journal of Applied Research for Community Development and Empowerment) Vol. 10 No. 1 (2026)
Publisher : Asia Pacific Network for Sustainable Agriculture, Food and Energy (SAFE-Network)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29165/ajarcde.v10i1.959

Abstract

This study presents the development of a biocompatible and biodegradable nanofiber-based wound dressing fabricated via electrospinning using a composite of polylactic acid (PLA), cellulose, chitosan, and polyethylene glycol (PEG). The novelty of this work lies in the systematic control of material composition and processing parameters, particularly the feed rate, to regulate fiber morphology and surface properties. The results demonstrate that the incorporation of PEG, cellulose, and chitosan influences the contact angle through intermolecular hydrogen bonding, without forming new chemical bonds, indicating that physical blending rather than chemical interactions govern the system. Furthermore, increasing the feed rate enhances polymer jet stretching, resulting in finer and more uniform nanofibers. The resulting nanofiber structure exhibits characteristics suitable for wound dressing applications, including improved interaction with aqueous environments and structural uniformity. Overall, this study provides insight into the relationship between material composition, processing conditions, and nanofiber formation mechanisms, contributing to the rational design of advanced biomaterials for biomedical applications. Contribution to Sustainable Development Goals (SDGs):SDG 3: Good Health and Well-beingSDG 9: Industry, Innovation and InfrastructureSDG 12: Responsible Consumption and ProductionSDG 13: Climate Action
Production of Nanocrystalline Cellulose from Cassava Stems Using Hydrochloric Acid Hydrolysis Method Permatasari, Mauludiah; Anggraeni, Shinta Ristiana; Triana, Nurul Widji; Muljani, Srie; Sani, Sani
Reka Buana : Jurnal Ilmiah Teknik Sipil dan Teknik Kimia Vol 11, No 1 (2026): EDISI MARET 2026
Publisher : Universitas Tribhuwana Tunggadewi Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33366/rekabuana.v11i1.8339

Abstract

Nanocrystalline cellulose (NCC) is a fiber-based material with one dimension in the nanometer scale (1–100 nm), featuring high specific surface area, excellent mechanical strength, and biodegradability. It has great potential as an environmentally friendly polymer filler. This study aims to synthesize nanocrystalline cellulose from cassava stem waste via acid hydrolysis with 32% hydrochloric acid (HCl) and to examine the effects of varying sample weight and HCl volume on particle size and morphology. The process involved delignification using sodium sulfite, bleaching with hydrogen peroxide, and acid hydrolysis. Sample weights (5–9 grams) and HCl volumes (50–90 mL) were varied. PSA results showed the smallest particle size was 5,564.2 nm (5 g, 70 mL) and the largest was 23,132.1 nm (9 g, 50 mL). PDI indicated a more homogeneous particle distribution at higher HCl volumes. SEM analysis revealed that the typical NCC structure had not yet been optimally formed. Therefore, further optimization of the synthesis process is necessary, highlighting the importance of refining each step to achieve desired nanomaterial properties.
PENGARUH pH PRESIPITASI DAN SUHU SINTERING TERHADAP KARAKTERISTIK KALSIUM OKSIDA (CaO) DARI LIMBAH Ca(OH)2 PRODUKSI GAS ASETILEN Frida Nadhila Yansa; Diah Ayu Sulistia; Ely Kurniati; Srie Muljani; Nurul Widji Triana
JURNAL INTEGRASI PROSES Vol 15, No 1 (2026)
Publisher : JURNAL INTEGRASI PROSES

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/jip.v15i1.39032

Abstract

Industri gas asetilen menghasilkan limbah padat berupa kalsium hidroksida (Ca(OH)₂) yang termasuk dalam kategori limbah B3 (Bahan Berbahaya dan Beracun). Tingginya kandungan kalsium pada limbah ini dapat dimanfaatkan sebagai sumber kalsium alternatif dalam sintesis kalsium oksida (CaO) yang bernilai tambah. Penelitian ini bertujuan untuk mengkaji pengaruh variasi pH dan suhu sintering terhadap karakteristik CaO dari limbah Ca(OH)₂ produksi gas asetilen. Proses sintesis dilakukan melalui metode presipitasi dengan pengkondisian pH 10, 11, 12, 13, dan 14, dilanjutkan dengan proses sintering pada suhu 550 °C, 650 °C, 750 °C, 850 °C, dan 950 °C. Karakterisasi meliputi analisis yield, penentuan kadar kalsium menggunakan spektrofotometer serapan atom (SSA), serta pengamatan morfologi menggunakan Scanning Electron Microscopy (SEM). Hasil penelitian menunjukkan bahwa peningkatan pH berpengaruh terhadap kenaikan yield CaO, sedangkan peningkatan suhu sintering meningkatkan kadar kalsium akibat dekomposisi Ca(OH)₂ yang lebih optimal. Kondisi terbaik diperoleh pada pH 14 dan suhu 950 °C dengan kadar kalsium 69,22%. Ukuran partikel CaO yang terbentuk adalah 140,5 nm, yang masih berada di atas rentang standar nanopartikel (1–100 nm) berdasarkan ISO 80004-1:2023. Temuan ini menunjukkan limbah Ca(OH)₂ produksi gas asetilen berpotensi dimanfaatkan sebagai bahan baku CaO, meskipun diperlukan optimasi lebih lanjut untuk menghasilkan material berskala nano.
SINTESIS, KARAKTERISASI, DAN UJI APLIKASI PUPUK Ca-N-P-K DARI TULANG SAPI TERKALSINASI DENGAN METODE PELARUTAN DAN PRESIPITASI Tazkia Jaufillail; Azzahra Maritza Putri; Srie Muljani; Atika Nandini
JURNAL INTEGRASI PROSES Vol 15, No 1 (2026)
Publisher : JURNAL INTEGRASI PROSES

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/jip.v15i1.39315

Abstract

Limbah tulang sapi merupakan sumber kalsium fosfat yang melimpah, namun pemanfaatannya di sektor pertanian masih terbatas. Pengolahan tulang sapi menjadi pupuk multinutrien berbasis Ca-N-P-K dapat menjadi solusi berkelanjutan untuk mengurangi limbah organik, meningkatkan nilai tambah, menyediakan sumber hara makro yang ramah lingkungan, serta mendukung ketahanan pangan nasional. Penelitian ini bertujuan untuk mensintesis dan mengarakterisasi pupuk berbasis tulang sapi terkalsinasi melalui metode pelarutan dan presipitasi dengan variasi pH (7-11) dan kecepatan pengadukan (300–400 rpm) serta mengevaluasi keterkaitannya terhadap sifat material dan kinerja awal sebagai pupuk. Hasil penelitian menunjukkan bahwa meskipun pH 9 menghasilkan kristalinitas dan morfologi partikel yang lebih baik, kondisi optimum ditetapkan pada pH 7 pada rpm 350 karena memberikan yield tertinggi serta distribusi fase dan kandungan CaO–P2O5 yang lebih sesuai untuk aplikasi pupuk multinutrien. Analisis X-Ray Fluorescence (XRF) mengonfirmasi kandungan CaO 26,95%, P2O5 32,99%, dan K2O 1,87%, dengan pembentukan fase CaKPO4 sebesar 39,51%. Karakterisasi X-Ray Diffraction (XRD) menunjukkan keberadaan fase utama CaKPO4 39,51%, CaHPO4·2H2O 39,11%, dan CaNH4PO4·7H2O 21,38%, dengan derajat kristalinitas 72,48%. Tingkat kristalinitas ini berperan dalam mengontrol stabilitas struktur dan laju pelepasan nutrisi sehingga memengaruhi ketersediaan hara dalam tanaman. Analisis SEM-EDX menunjukkan morfologi partikel halus berukuran rata-rata 300,99 nm dengan distribusi unsur Ca, P, N, dan K yang merata, yang berpotensi meningkatkan luas permukaan dan efisiensi pelepasan nutrisi. Uji aplikasi awal pada tanaman tomat skala laboratorium menunjukkan peningkatan pertumbuhan dibandingkan dengan kontrol. Hasil ini menegaskan bahwa limbah tulang sapi berpotensi dikembangkan menjadi pupuk multinutrien berbasis fosfat untuk aplikasi agrikultur yang berkelanjutan.
Characteristic of the CaO-MgO Material Derived from Dolomite via Precipitation-Dehydration Method Matovanni, Maudy Pratiwi Novia; Sumada, Ketut; Muljani, Srie; Pertiwi, Beta Cahaya
Equilibrium Journal of Chemical Engineering Vol 9, No 1 (2025): Volume 9, No 1 July 2025
Publisher : Program studi Teknik Kimia UNS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/equilibrium.v9i1.104095

Abstract

Abstract. This research utilized dolomite rock (CaMg(CO2)2) to produce CaO-MgO material using precipitation-dehydration. The precipitation-dehydration method was carried out by dissolving dolomite in 10% hydrochloric acid (HCl) solvent and precipitating in 2 N sodium hydroxide (NaOH) solution at a temperature of 80 oC. The resulting products were analyzed using Scanning Electron Microscope-Energy Dispersive X-Ray (SEM-EDX) and Brunauer-Emmett-Teller (BET). The acidity level of the solution was analyzed by using a pH meter. The analysis results using SEM-EDX show that the material has a characteristic chemical composition with a Ca/Mg ratio less than 1. The results of BET show that the average surface area, average pore volume, average pore size and average particle diameter are 71.1213 m2/g, 0.1081 cc/g, 20.5165 nm, and 36 nm, respectively. The solution's acidity (pH level) in precipitation-dehydration is 8-8.5. It is identified that precipitation-dehydration can be used for CaO-MgO recovery and further application in catalyst materials.Keywords:Dolomite rock, Calcium oxide, Magnesium oxide, Precipitation-dehydration
Co-Authors A.R Yelvia Sunarti Abdullah, Affan Zein Adelita Sidabutar Agustina, Meri Aisyah Alifatul Zahidah Rohmah Ajiz, Hendrix Abdul Amalia, Ayu Rizka Amelia Putri Kusherawati Anggelina, Efline Anggoro, Achmad Rahditya Viman Anggraeni, Shinta Ristiana Anhar, Farhan Auladana Putra AR Yelvia Sunarti ari, Citra Yulia S Arianti, Rahma Dea Rerindra Astuti, Dwi Hery Atika Nandini Azzahra Maritza Putri Bambang Wahyudi Bambang Wahyudi Wahyudi Caecilia - Pujiastuti Caecilia Pujiastuti Caecilia Pujiastuti Caecillia Pujiastuti Cahyo, Mei Syella Kurnia Putri Candra, Adi Clareta Rahmawati Maudy Damayanti, Savira Farizqy Darma, Apriandi Putra Diah Ayu Sulistia Diah Nur Fitri Midayoga Dwi Hery Astuti Dwipayanti, Juvita Retno Dyah Suci Perwitasari Ely Kurniati Erliyanti, Nove Kartika Erwan Adi Saputro Faiqoh, Iklimatul Farida Pulansari Frida Nadhila Yansa Heru Setyawan Indah Dwi Wahyuningsih ISNI UTAMI Isni Utami J.E. Sutanto Jawwad, Muhammad Abdus Salam JE Sutanto Kamil, Ihsan Ketut Sumada Kindriari Nurma Wahyusi Kusuma, Kurnia Arifiani L.Urip Widodo, Yohandrik Novel Karaman Luluk Edahwati Maharani, Eka Ferdinda Putri Ayu Matovanni, Maudy Pratiwi Novia Matovanni, Maudy Pratiwi Novia Maulana, Mochamad Titus Mega Rosilina Mega Rosilina Mirwan, Mohammad Moch Iqbal Darmawan Mochamad Titus Maulana Mochamad Titus Maulana Mohammad Falahul Habibaini Nuruddin Mu’tasim Billah Nana Dyah Siswati, Anwar Zain and Mohammad Nicander, Priscillia stevanies Nofitasari, Luluk Novanto, Satria Agung Nove Kartika Noviardyanti, Fara Zabrina Nur Annisa Nur Hapsari Nurul Widji Triana Pamoedji, Yemima Natalia Eka Kristiyanti Pangestu, Titan Obby Permatasari, Mauludiah Pertiwi, Beta Cahaya Pradana, Alfian Rizki Prasetyo Hadi Prasetyo, Muhammad Dewa Pujiastuti, Caecilia Pujiastuti, Caecilia Pujiastuti, Caecilia Pujiastuti, Caecilia Pujiastuti, Caecilia - Putri, Alisyah Ananda Ramadhan, Mochamad Rafli Reva Edra Nugraha Rifaldi, Kornelius Rosilina, Mega S Suprihatin Sani Sani Sari, Amilia Putri Puspita Shofiyah Silviya Nur Ridha Sintha Soraya Santi Sri Redjeki Sukirmayadi Sukirmayadi Sunarti, A.R Yelvia Suprianti, Lilik Suprihatin Suryandari, Ade Sonya Susilowati sutiyono sutiyono Syis Muhim Tazkia Jaufillail Titi Susilowati Tri Widjaja Trianna, Nurul Widji Utami, Noni Esti Verbiawan, Erza Anggara Wahyu Hidayah Widiyastuti Widiyastuti Widyaningrum, Nilam Putri Wiraya, Wira Arta Wisnu Adi Prasojo Yuani Firanita Yulia S, Putri Arysanti