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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
Chemical Engineering Department, Engineering Faculty, Universitas Pembangunan Nasional “Veteran” Jawa Timur, Surabaya 60294, Indonesia
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Penurunan Kadar COD dan BOD Pada Limbah Cair PT Candi Jaya Amerta Menggunakan Adsorben dari Abu Layang (Fly Ash) dengan Proses Adsorpsi Secara Kolom Handy, Febry Widiatniko; Juwana, Krishna Rahmad; Sani; Puspitawati, Ika Nawang
Al-Ard: Jurnal Teknik Lingkungan Vol. 10 No. 1 (2024): September
Publisher : Department of Environmental engineering, Faculty of Science and Technology, Islamic State University Sunan Ampel Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29080/alard.v10i1.2113

Abstract

PT. Candi Jaya Amerta is an industry that produces fly ash from coal combustion in boilers and wastewater from its production processes. The utilization of fly ash in this industry has not been well optimized, and the wastewater is characterised by elevated concentrations of organic matter, primarily generated from shrimp cracker production. High organic content in wastewater can lead to environmental pollution. Goal of this research is to determine the effect of sampling time on the reduction of Chemical Oxygen Demand (COD) and Biochemical Oxygen Demand (BOD) levels in the wastewater of PT. Candi Jaya Amerta using fly ash adsorbent through a column adsorption process system, employing the Yoon-Nelson, Adam-Bohart, and Thomas approaches. The variables employed in this study are sampling times of 20, 40, 60, 80, and 100 minutes, and adsorbent heights of 9, 13, 17, 21, and 25 cm. The research findings show that the optimal adsorbent height for reducing COD is 21 cm, with a reduction percentage of 88.2705% and a COD adsorption capacity of 7.2593 mg/g at a sampling time of 60 minutes. Meanwhile, the optimal adsorbent height for reducing BOD is 25 cm, with a reduction percentage of 98.1509% and a BOD adsorption capacity of 87.4255 mg/g at a sampling time of 60 minutes.
Synthesis of Ammonium Silicate Liquid Fertilizer from Rice Husk Ash Santi, Sintha Soraya; Pramuji, Faiq Hawaari Ahmad; Juventino, Syahdhan Adiyah Islami; Puspitawati, Ika Nawang
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.v9i3.822

Abstract

This study aims to synthesise liquid ammonium silicate fertiliser ((NH?)?SiO?) from rice husk ash and to determine the effects of varying ammonium hydroxide (NH?OH) concentration and reaction temperature on the resulting silica (Si) and nitrogen (N) content. Rice husk ash is used as a silica source because it contains high levels of SiO?, up to 82%. The research process includes three main stages: raw material preparation; silica extraction using 10% NaOH at 80°C for 120 minutes; and a synthesis reaction between the extracted silica and an NH?OH solution (5–25%) at 30–110°C for 60 minutes. Silica content analysis was carried out using UV-Vis spectrophotometry, while nitrogen content was analyzed using the Kjeldahl method. The results showed that increasing NH?OH concentration and reaction temperature significantly increased silica content, while increasing temperature tended to decrease nitrogen content due to ammonia volatility. The best conditions were obtained at a NH?OH concentration of 25%, a reaction temperature of 70°C, a silica content of 5.2701%, and a nitrogen content of 17.1637%. The results meet the SNI 02-6681-2002 standard for liquid macro compound fertilizers, which requires a minimum content of 4% for silica and nitrogen. Thus, rice husk ash has great potential as an alternative raw material for the manufacture of environmentally friendly ammonium silicate liquid fertilizers. Contribution to Sustainable Development Goals (SDGs):SDG 2: Zero HungerSDG 9: Industry, Innovation, and InfrastructureSDG 12: Responsible Consumption and ProductionSDG 13: Climate Action
Optimization of Biodiesel Synthesis from Waste Cooking Oil By Transesterification Process in A Microwave Wati, Ika Yuliana; Nurfauziah, Rosavinda; Susilowati; Puspitawati, Ika Nawang; Perwitasari, Diyah Suci; Suprihatin; Ramandani, Adityas Agung
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
Sosialisasi Digitalisasi Marketing UMKM Desa Karangkuten Kecamatan Gondang Kabupaten Mojokerto: Socialization of Marketing Strategies for MSMEs in Karangkuten Village Gondang District Mojokerto Regency Sulaiman, Yusri Risyad; Prakoso, Satryo Arya; Sani, Sani; Puspitawati, Ika Nawang
Jurnal Abdimas Le Mujtamak Vol. 5 No. 2 (2025): Le MUJTAMAK 2025: Juli - Desember
Publisher : Universitas Islam Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46257/jal.v5i2.1259

Abstract

Permasalahan utama yang dihadapi oleh pelaku UMKM di Desa Karangkuten, Kecamatan Gondang, Kabupaten Mojokerto adalah kurangnya pemahaman dalam menerapkan strategi pemasaran digital yang efektif. Tujuan kegiatan ini adalah memberikan sosialisasi dan pelatihan kepada pelaku UMKM terkait pemanfaatan media sosial dan teknologi kecerdasan buatan (AI) dalam menunjang pemasaran produk. Metode yang digunakan adalah penyuluhan langsung disertai dengan penyebaran kuisioner untuk mengetahui kondisi aktual dan kebutuhan peserta. Hasil kegiatan menunjukkan bahwa mayoritas pelaku usaha masih menggunakan metode pemasaran konvensional dan belum mengoptimalkan platform digital, meskipun sebagian telah memanfaatkan WhatsApp dan Facebook. Sosialisasi ini berhasil meningkatkan kesadaran peserta tentang pentingnya digital marketing serta mendorong ketertarikan terhadap pelatihan lebih lanjut, khususnya dalam hal fotografi produk dan penggunaan AI seperti ChatGPT. Kegiatan ini menjadi langkah awal dalam mendorong transformasi digital bagi UMKM agar mampu bersaing di era industri 4.0. 
PEMBATASAN KONSTITUSIONAL TERHADAP HAK PREROGATIF PRESIDEN DALAM PENYUSUNAN KABINET DI INDONESIA Nurizki, Nawang Ika; Achmad, Achmad; Isharyanto, Isharyanto
YUSTISI Vol 13 No 1 (2026)
Publisher : Universitas Ibn Khaldun Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32832/yustisi.v13i1.22144

Abstract

Penelitian ini bertujuan untuk menganalisis Pembatasan Konstitusional terhadap Hak Prerogatif Presiden dalam Penyusunan kabinet di Indonesia. Penelitian dilakukan dengan metode penelitian hukum normatif melalui pendekatan perudang-undangan dan konseptual dengan menggunakan teknik analisis deskriptif untuk menganalisis bahan hukum primer dan sekunder. Hasil penelitian menunjukkan bahwa kewenangan Presiden untuk membentuk memilih menteri dan menentukan jumlah kementerian tidak mutlak. Presiden harus tetap tunduk pada batasan konstitusional, mekanisme checks and balances dan ketentuan undang-undang, seperti UU No. 39 Tahun 2008 dan UU No. 61 Tahun 2024. Adanya pembatasan ini untuk mencegah terjadinya kesewenang-wenangan serta menjaga efisiensi birokrasi pemerintahan. Penelitian ini menegaskan bahwa pelaksanaan hak prerogatif Presiden harus tetap dalam koridor hukum tata negara sehingga tidak menjadi kekuasaan yang absolut. Penelitian ini memberikan pemahaman mengenai keseimbangan antara diskresi eksekutif dan pembatasan hukum dan implikasinya dalam penyelenggaraan negara. Dengan demikian, Pembatasan Konstitusional terhadap hak prerogatif dalam penyusunan kabinet di Indonesia sangat diperlukan untuk menjamin penyelenggaraan pemerintahan yang akuntabel dan berorientasi pada kepentingan publik.
PEMBATASAN KONSTITUSIONAL TERHADAP HAK PREROGATIF PRESIDEN DALAM PENYUSUNAN KABINET DI INDONESIA Nurizki, Nawang Ika; Achmad, Achmad; Isharyanto, Isharyanto
YUSTISI Vol 13 No 1 (2026)
Publisher : Universitas Ibn Khaldun Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32832/yustisi.v13i1.22144

Abstract

Penelitian ini bertujuan untuk menganalisis Pembatasan Konstitusional terhadap Hak Prerogatif Presiden dalam Penyusunan kabinet di Indonesia. Penelitian dilakukan dengan metode penelitian hukum normatif melalui pendekatan perudang-undangan dan konseptual dengan menggunakan teknik analisis deskriptif untuk menganalisis bahan hukum primer dan sekunder. Hasil penelitian menunjukkan bahwa kewenangan Presiden untuk membentuk memilih menteri dan menentukan jumlah kementerian tidak mutlak. Presiden harus tetap tunduk pada batasan konstitusional, mekanisme checks and balances dan ketentuan undang-undang, seperti UU No. 39 Tahun 2008 dan UU No. 61 Tahun 2024. Adanya pembatasan ini untuk mencegah terjadinya kesewenang-wenangan serta menjaga efisiensi birokrasi pemerintahan. Penelitian ini menegaskan bahwa pelaksanaan hak prerogatif Presiden harus tetap dalam koridor hukum tata negara sehingga tidak menjadi kekuasaan yang absolut. Penelitian ini memberikan pemahaman mengenai keseimbangan antara diskresi eksekutif dan pembatasan hukum dan implikasinya dalam penyelenggaraan negara. Dengan demikian, Pembatasan Konstitusional terhadap hak prerogatif dalam penyusunan kabinet di Indonesia sangat diperlukan untuk menjamin penyelenggaraan pemerintahan yang akuntabel dan berorientasi pada kepentingan publik.
PENGENALAN PEMANFAATAN EKSTRAK SERAI WANGI SEBAGAI PESTISIDA ORGANIK DI DESA BOCEK KARANGPLOSO MALANG Nurmawati, Ardika; Puspitawati, Ika Nawang; Anggraeni, Ika Favia; Raditya, Dendy Wahyu; Pradana, Novan Sandhi; Saputro, Erwan Adi
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
Synthesis of Calcium Phosphate from Snail Shell Waste Using the Hydrothermal Method Rochman, Ananda Arif; Rahman, Nazila Aulya; Sani, Sani; Pujiastuti, Caecilia; Puspitawati, Ika Nawang
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.
Characterization of Activated Carbon from Palm Oil Solid Waste Using HCl Activation and Carbonization Technique Sani Sani; Nurul Widji Triana; Ika Nawang Puspitawati; Nur Mila Eka Zaliyanty; Mochammad Arip Pancar Agung
Jurnal Teknik Kimia Vol. 20 No. 2 (2025): JURNAL TEKNIK KIMIA
Publisher : Program Studi Teknik Kimia, Universitas Pembangunan Nasional Veteran Jawa Timur

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33005/jurnaltekkim.v20i2.41

Abstract

The increasing volume of palm oil solid waste in Indonesia offers an opportunity for valorization into high-value materials. This study explores the potential of converting palm oil waste—comprising empty fruit bunches, shells, and fibers—into activated carbon through hydrochloric acid activation. The carbonization process was varied across five temperature levels (250–450 °C) and durations (60–120 minutes) to determine optimal conditions that meet the criteria of SNI 06-3730-2021. Post-carbonization, chemical activation was conducted using a 20% HCl solution. The most favorable result was obtained at 450 °C for 105 minutes, yielding activated carbon with 81.68% fixed carbon, 3.85% moisture, 10.29% volatile matter, and 4.18% ash content. Furthermore, adsorption capacities reached 763.98 mg/g for iodine and 178.82 mg/g for methylene blue. These findings suggest that palm oil waste can be effectively transformed into activated carbon that satisfies national quality standards.
Characterization Bio-Based Edible Film from Mango Seed Starch and Semi-Refined Carrageenan (Euchema cottonii) Using Sorbitol Plasticizer for Potential Food Contact Materials Sintha Soraya Santi; Ika Nawang Puspitawati; Tim Pasang
Jurnal Penelitian Pendidikan IPA Vol 10 No 10 (2024): October
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v10i10.8601

Abstract

Meanwhile, Semi-Refined Carrageenan (SRC) could be combined with starch as the base material for edible film fabrication to increase its tensile strength. This study aimed to identify edible film by synthesizing SRC and mango seed starch with plasticizer sorbitol, which could be safe for consumption in food packaging. The process of making edible film consists of three steps: extracting Eucheuma cottonii seaweed, making starch from mango seeds, and making edible film. The method used was the solution casting method, with a ratio of SRC: starch of mango seeds, namely 1: 0; 0.7: 0.3; and 0: 1 (w / w) and sorbitol concentrations of 20, 30, 40, 50, and 60% (w/w). This research shows that increasing sorbitol could decrease the tensile strength but increase the elongation and solubility of the edible film. As well as the combination of SRC and mango seed starch can produce edible films with higher characteristics than edible films based only on SRC or mango seed starch. The results of selecting the best conditions for an edible film based on the Japanese Industrial Standard (JIS) are the concentration ratio of SRC: mango seed starch (0.7: 0.3) and 30% sorbitol concentration with a thickness value of 0.22 mm, tensile strength 4.81 MPa, 28.50% elongation and 68.44% solubility
Co-Authors Abdul Rachman Wirayudha Abdullah Tsani M.N.K Achmad Achmad Achmad Rahditya Viman Anggoro Ahmad Thobroni Akbar Alif Julian Putra Rahmandika Anggraeni, Ika Favia 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 Caecillia P udjiastuti Dimas Nur Arifianto Dyah Suci Perwitasari Erwan Adi Saputro Erwan Adi Saputro Erwan Adi Saputro Febry Widiatniko Handy Handy, Febry Widiatniko Hasanah, Rofidatul 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 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 Novel Karaman Nungki Mela Sari Nur Mila Eka Zaliyanty Nurfauziah, Rosavinda Nurul Widji Triana Padmasari, Rahmita Perwitasari, Diyah Suci Pradana, Novan Sandhi Prakoso, Satryo Arya Pramuji, Faiq Hawaari Ahmad Pujiastuti, Caecilia Putri Sinta Dewi Sinaga Raditya, Dendy Wahyu Rahman, Nazila Aulya Rahmita Padmasari Ramandani, Adityas Agung Rasendriya Putra Reswara Rochman, Ananda Arif S Suprihatin Sagala, Maria Tania Agustia Sani Sani Sani Sani Sari, Dewa Ayu Made Dearwita Sintha Soraya Santi Sintha Soraya Santi Sirait, Esterly Septiana Sulaiman, Yusri Risyad Suprihatin Susilowati Tauhid, Aziz Hafizh Tiffanie Dewi Arifilla Tim Pasang Wahyu Dwi Lestari Wati, Ika Yuliana Yudhistira, Nashrulfatih Yusratus Sakinah