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All Journal JURNAL INTEGRASI PROSES Jurnal Penelitian Pendidikan IPA (JPPIPA) YUSTISI Al-Ard: Jurnal Teknik Lingkungan ASEAN Journal of Chemical Engineering G-Tech : Jurnal Teknologi Terapan Nusantara Science and Technology Proceedings Yustisi: Jurnal Hukum dan Hukum Islam ABSYARA: Jurnal Pengabdian Pada Masyarakat International Journal of Eco-Innovation in Science and Engineering (IJEISE) AJARCDE (Asian Journal of Applied Research for Community Development and Empowerment) Jurnal Pengbdian Teknik Mesin Archive: Jurnal Pengabdian Kepada Masyarakat Jurnal Abdimas Le Mujtamak Madani: Jurnal Pengabdian Masyarakat dan Kewirausahaan Environation (Environmental Engineering Journal of Community Dedication) Jurnal Teknik Kimia
Ika Nawang Puspitawati
Universitas Pembangunan Nasional Veteran Jawa Timur
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 Energy Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Physics Public Health Social Sciences Other

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Synthesis of Calcium Phosphate from Snail Shell Waste Using the Hydrothermal Method Ananda Arif Rochman; Nazila Aulya Rahman; Sani Sani; Caecilia Pujiastuti; Ika Nawang Puspitawati
G-Tech: Jurnal Teknologi Terapan Vol 10 No 2 (2026): G-Tech, Vol. 10 No. 2 April 2026
Publisher : Universitas Islam Raden Rahmat, Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70609/g-tech.v10i2.9325

Abstract

The utilization of biowaste as an alternative raw material has attracted increasing attention in biomaterial research. Snail shell waste, which is abundant and underutilized, contains a high calcium carbonate content and offers a unique, low-cost, and sustainable precursor for calcium phosphate synthesis, particularly for bone substitute applications. This study aimed to synthesize calcium phosphate from snail shell waste using the hydrothermal method and to evaluate the effects of pH and hydrothermal time on phase formation, purity, and particle size. The shells were calcined at 800 °C for 4 hours to produce calcium oxide (CaO), then reacted with phosphoric acid at pH 8–12 under hydrothermal conditions for 25–125 minutes. The precipitates were dried and sintered at 1000 °C for 5 hours. X-ray fluorescence analysis showed a CaO content of 99.20%. X-ray diffraction revealed calcium hydrogen phosphate, hydroxyapatite, and calcium carbonate phosphate hydroxide phases. The highest hydroxyapatite content (54%) was obtained at pH 8 and 25 minutes. Higher pH and longer processing time reduced purity. Scanning electron microscopy showed granular morphology, with particle sizes decreasing from 63 nm to 28 nm as pH increased. Although promising, the hydroxyapatite content does not yet meet RSNI3 ISO 13175-3:2012 requirements.
Optimization of Biodiesel Synthesis from Waste Cooking Oil By Transesterification Process in A Microwave Ika Yuliana Wati; Rosavinda Nurfauziah; Susilowati; Ika Nawang Puspitawati; Diyah Suci Perwitasari; Suprihatin; Adityas Agung Ramandani
AJARCDE (Asian Journal of Applied Research for Community Development and Empowerment) Vol. 9 No. 3 (2025)
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.v9i3.867

Abstract

The rising energy demand in Indonesia is driving the development of biodiesel as a sustainable, renewable fuel. Waste cooking oil has the potential as a biodiesel feedstock due to its abundant availability and relatively low cost. Biodiesel is generally produced via transesterification, but conventional heating methods have limitations, such as long reaction times and high energy consumption. Therefore, microwave-based heating is used as an alternative to improve process efficiency through rapid, even heating. This research aims to' optimize biodiesel synthesis from used cooking oil using a microwave-assisted transesterification process with the Response Surface Methodology (RSM) and Analysis of Variance (ANOVA) approaches. The process variables studied include catalyst' concentration (1', 2, 3, 4, and' 5%w/w) and' reaction time (2, 4, 6, 8, and 10 minutes), with biodiesel yield as the main response. A mathematical model was developed using an appropriate experimental design and statistically validated using ANOVA to assess the model's significance and the effects of interactions between variables. The research results showed the highest biodiesel yield at 4% catalyst with a reaction time of 6 minutes. The RSM method, validated by ANOVA, was effective in determining optimum operating conditions and increasing biodiesel yield. This approach has the potential to be applied as a highly effective and sustainable method for biodiesel production from used cooking oil. Contribution to Sustainable Development Goals (SDGs):SDG 7: Affordable and Clean EnergySDG 12: Responsible Consumption and ProductionSDG 13: Climate ActionSDG 15: Life on' Land
PENGENALAN PEMANFAATAN EKSTRAK SERAI WANGI SEBAGAI PESTISIDA ORGANIK DI DESA BOCEK KARANGPLOSO MALANG Ardika Nurmawati; Ika Nawang Puspitawati; Ika Favia Anggraeni; Dendy Wahyu Raditya; Novan Sandhi Pradana; Erwan Adi Saputro
ABSYARA: Jurnal Pengabdian Pada Masayarakat Vol 3 No 1 (2022): ABSYARA: Jurnal Pengabdian Pada Masyarakat
Publisher : Universitas Hamzanwadi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29408/ab.v3i1.5844

Abstract

Bocek Village, located in Karangploso District, Malang Regency, is one of the villages known for its chili production. However, the production of chili plants in this village is often affected by diseases caused by pests such as the fungus Colletotrichum spp., which will cause anthracnose (Patek) disease. This disease can cause defects in chili, reducing the quality of chili production. The farmers have handled the handling by using chemical pesticides, which are considered less effective and harm the environment. One solution that can be used is to use extracts from the citronella to be used as organic pesticides. This community service activity aims to introduce organic pesticides with citronella oil as raw material to the Tri Rejeki farmers group in Bocek Village. The socialization activity was carried out using the lecture method with the material covering the introduction of pesticides, the difference between chemical and organic pesticides, extraction of essential oils with a simple method, and the production process of organic pesticides with citronella oil. An evaluation of the participants was also carried out through a questionnaire given before and after the socialization. After the socialization was conducted, participants understood more about organic pesticides and how to produce them
Co-Authors Abdul Rachman Wirayudha Abdullah Tsani M.N.K Achmad Achmad Achmad Rahditya Viman Anggoro Adityas Agung Ramandani Ahmad Thobroni Akbar Akhmad Syafiq Hasbi Alif Julian Putra Rahmandika Ananda Arif Rochman Anita Ristikawati Annisa Mutiara Salma Haque Anwar, Rangga Febry AR Yelvia AR Yelvia Sunarti AR Yelvia Sunarti Ardika Nurmawati, Ardika Aristio, Rivaldi Arke, Nadya Ramadhani Aziz Hafizh Tauhid Caecilia Pujiastuti Caecillia P udjiastuti Delia Shelamita Prasetya Dendy Wahyu Raditya Dimas Nur Arifianto Diyah Suci Perwitasari Dyah Suci Perwitasari Ely Kurniati Erwan Adi Saputro Erwan Adi Saputro Erwan Adi Saputro Febry Widiatniko Handy Handy, Febry Widiatniko Hasanah, Rofidatul Ika Favia Anggraeni Ika Yuliana Wati Isharyanto Isharyanto Juventino, Syahdhan Adiyah Islami Juwana, Krishna Rahmad Kindriari Nurma Wahyusi Laili Mabrur Rohma Lintang Sekar Wulandari Setyabudi Lucky Indrati Utami Lucky Indrati Utami Luluk Edahwati M. Fikri M.N.K, Abdullah Tsani Moch Akbar Munin Putra Mochammad Arip Pancar Agung Moh Nur Fuadzi Mohamad Nabhan Putra Redian Muljani, Sri Mutasim Billah Nazila Aulya Rahman Ni Ketut Sari Novan Sandhi Pradana Novel Karaman Nungki Mela Sari Nur Mila Eka Zaliyanty Nurul Widji Triana Padmasari, Rahmita Perwitasari Prakoso, Satryo Arya Pramuji, Faiq Hawaari Ahmad Putri Sinta Dewi Sinaga Rahmita Padmasari Raihan Navil Junizal Ramandani, Adityas Agung Rasendriya Putra Reswara Rosavinda Nurfauziah S Suprihatin Sagala, Maria Tania Agustia Sani Sani Sani Sani Sani Sani Sani Sari, Dewa Ayu Made Dearwita Sherina Tri Syopianti SINTA SORAYA SANTI Sintha Soraya Santi Sintha Soraya Santi Sintha Soraya Santi Sirait, Esterly Septiana Srie Mulnani Sulaiman, Yusri Risyad Suprihatin Suprihatin Susilowati Syahwaliza Chaniatul Chabibbah Tauhid, Aziz Hafizh Teodora Merry Meriba Vica Juliana Br Lumbanraja Tiffanie Dewi Arifilla Tim Pasang Wahyu Dwi Lestari Yudhistira, Nashrulfatih Yusratus Sakinah