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All Journal Jurnal Preventia Jurnal Rekayasa Bahan Alam dan Energi Berkelanjutan JURNAL INTEGRASI IJCER (International Journal of Chemistry Education Research) Indonesian Journal of Chemical Analysis (IJCA) Eksakta : Berkala Ilmiah Bidang MIPA Jurnal Ilmiah Teknik Kimia PREPOTIF : Jurnal Kesehatan Masyarakat Madaniya Edumedia: Jurnal Keguruan dan Ilmu Pendidikan Jurnal Abdimas Sangkabira Abdi Teknoyasa Molekul: Jurnal Ilmiah Kimia Jurnal Inovasi Daerah Jurnal Teknologi Bahan Alam
Siti Khuzaimah
Universitas Nahdhatul Ulama Al Ghazali Cilacap
Religion Agriculture, Biological Sciences & Forestry Humanities Astronomy 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 Economics, Econometrics & Finance Education Energy Engineering Environmental Science Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Mathematics Mechanical Engineering Public Health Social Sciences Other

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N-Doped and Chemically Activated Carbons Derived from Shrimp Shells Waste as Potential Electrode Materials for Electrochemical Supercapacitors Khuzaimah, Siti; Mujiburohman, Muhammad; Sugiharto, Agung; Widayatno, Tri; Fuadi, Ahmad M.
Molekul Vol 20 No 2 (2025)
Publisher : Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.jm.2025.20.2.11050

Abstract

ABSTRACT. Supercapacitors are widely recognized as energy storage solutions due to their high-power densities and long cycle life. Furthermore, there is growing scientific and technological interest in converting biomass waste into carbon materials for manufacturing supercapacitor electrodes. In addition to their abundance and cost-effectiveness, the appeal of carbons derived from biomass lies in their tuneable porosity, which enables the rational design of carbon materials to achieve the desired performance of supercapacitors. This work presents the synthesis of activated carbons from shrimp shells waste and its application for supercapacitor electrodes, with an activation treatment using phosphoric acid (H3PO4) and nitrogen doping (N-doped). The activator concentration was varied at 3, 6, and 9 M; while the N-doped ratios were 1:3, 1:5, and 1:7. The characteristics of activated carbon and supercapacitor electrodes was analysed with BET, SEM, CV, and GCD. The resulting materials exhibited amorphous and predominant microporous structures. Increasing the activation concentration gave smaller specific surface area, from 17.522 to 9.509 m2 g−1. The electrochemical properties of these activated carbons for supercapacitor applications were investigated by cyclic voltammetry, galvanostatic charge–discharge, with KOH electrolyte. The best activated carbon produced was mesoporous with the highest specific surface of 17.522 m2/g, obtained at 3 M H3PO4 and a nitrogen doping ratio of 1:3. At the same activator concentration and nitrogen doping ratio (3 M; 1:3), the highest capacitance was obtained 16.320 Farad, with current charging and discharging stop at 475 seconds and 1235 seconds, respectively. This work showcases the efficient and sustainable utilization of shrimp shells waste as a carbon source for supercapacitor applications and highlights their value in a circular economy. Keywords: Activated carbon, Activator H3PO4, Nitrogen doping, Shrimp shell, Supercapacitor
Comparison the Effectiveness of Silica Sand and Resin Filter Media on Reducing Phosphate Levels of Wastewater of PKU Muhammadiyah Hospital Surakarta Asharani, Regita; Sugiharto, Agung; Khuzaimah, Siti; Estiyantara, Nurhadi
Jurnal Teknologi Bahan Alam Volume 3, Issue 1, April 2024
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/jtba.v3i1.3710

Abstract

Liquid waste containing phosphates has an effect on human health. Phosphate levels based on the results of preliminary tests carried out at the PKU Muhammadiyah Hospital in Surakarta were 5.7 mg/L; these results exceeded wastewater quality standards. There are many ways to reduce phosphate levels to comply with wastewater quality standards, including adding PAC coagulants, alum, and others. However, this is less effective when applied to hospital wastewater, so the researchers used the filtration method to reduce phosphate levels. The filtration method is a filtering process that separates particles or sediment so that they are not carried away with the treated water ready for discharge. The filter media used include zeolite, activated carbon, resin, silica sand, and many more. In this research, only two filter media were used, comparing the effectiveness of silica sand and resin filter media. Processing used variations in column height of 60 cm, 80 cm, and 100 cm, employing slow filter filtration experimental methods and laboratory tests to reduce phosphate levels in wastewater from PKU Muhammadiyah Hospital Surakarta.
Pemanfaatan Cairan Asam Laktat dari Fermentasi Limbah Kubis (Brassica Oleracea) untuk Pengawetan Buah Tomat dan Anggur Maulinasari, Dhita; Sugiharto, Agung; Khuzaimah, Siti; Estiyantara, Nurhadi
Jurnal Teknologi Bahan Alam Volume 3, Issue 1, April 2024
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/jtba.v3i1.3714

Abstract

Larutan limbah kubis (Brassica oleracea) merupakan hasil akhir dari fermentasi limbah kubis. Solusi ini dapat digunakan sebagai pengawet alami untuk buah-buahan. Limbah kubis menghasilkan asam laktat. Asam laktat bersifat asam dan digunakan untuk menurunkan pH dan menekan pertumbuhan bakteri lain, termasuk yang mudah rusak. Asam laktat ini dapat dibentuk melalui proses fermentasi yang berlangsung dengan adanya aktivitas spontan Lactobacillus. Tujuan dari penelitian ini adalah untuk mengetahui efektifitas limbah kubis (Brassica Oleracea) dalam mengawetkan buah anggur dan tomat melalui uji organoleptik. Penggunaan larutan limbah kubis (Brassica Oleracea) sebagai pengawet alami yang sederhana dan efektif, serta memberikan fakta kepada masyarakat tentang limbah kubis yang dapat digunakan sebagai pengawet alami yang tidak berbahaya. Penelitian ini dilakukan dengan enam perlakuan yaitu buah anggur dan tomat tanpa perendaman (kontrol), buah anggur dan tomat direndam selama 1 hari, 2 hari hingga 5 hari. Variasi perendaman buah anggur dan tomat ini berpengaruh nyata terhadap rasa, warna, aroma, dan tekstur yang dibuktikan dengan melakukan uji organoleptik. Berdasarkan hasil uji organoleptik, untuk buah anggur tanpa perendaman mengalami penyusutan yang cukup signifikan di hari ke-5 yaitu dengan berat 4,623 gr, sedangkan untuk buah anggur dengan perendaman mengalami penyusutan pada hari ke-6 dengan berat 1.675 gr. Untuk buah tomat tanpa perendaman, mengalami penyusutan yang cukup signifikan di hari ke-5 yaitu dengan berat 4.239 gr, sedangkan untuk buah tomat dengan perendaman mengalami penyusutan pada hari ke-6 dengan berat 0.881 gr
Pengaruh Aktivator HCL dalam Arang Tempurung Kelapa Guna Menurunkan Kadar COD, BOD, dan TSS pada Limbah Cair Tahu Khuzaimah, Siti; Nafa, Kharismatun
JURNAL INTEGRASI Vol. 16 No. 1 (2024): Jurnal Integrasi - April 2024
Publisher : Pusat Penelitian dan Pengabdian Masyarakat Politeknik Negeri Batam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30871/ji.v16i1.7197

Abstract

Indonesia is an agricultural country where most of the population has a livelihood as farmers, especially in the Cilacap region of Central Java. Coconut plant (Cocus nucifera .L) is a tropical plant that thrives in Indonesia and is known by the public and has various uses. However, the utilization of coconut plants is generally only limited to the flesh of the fruit to be processed into coconut milk, so that other parts of the coconut plant, such as coconut shells tend to be potentially as waste and underutilized optimally[1]. Coconut shell can be used as activated charcoal using HCL activator with a simple and economical method. The number of activator concentrations used is 1N and 3N. By using the method of adsorption and filtration to treat wastewater tofu obtained a decrease in the levels of COD, BOD, and TSS are different. In the use of HCL activator 1N obtained results of reduction of COD, BOD, and TSS sequentially by 20%, 23%, and 73%. The results were obtained after the sample was adsorbed and filtration for 2 hours. While the effectiveness of the use of HCL 3N activator resulted in a decrease in COD, BOD, and TSS levels by 28%, 31%, and 76%.
Co-Authors Agung Kurniawan Agung Sugiharto Al Dina Khoerunisa Nur Masudah Alimah, Gustin Nur Anisa Afifatul Aziizah Anisha Dian Iswahyuni Arina Manasikana Arnesya Ramadhani Asharani, Regita Ayu Pramita Azzizzah, Frida Amriyati Dini Novi Rohmah Dini Novi Rokhmah Elliza, Sri Estiyantara, Nurhadi Fitriyati Fuadi, Ahmad M. Hafizhah, Melisa Happy Ayu Puspa Sari Hidayat, Fajri Wan Istiqomah, Tri Julianti, Rosiana Kartini Megasari Kodrat Pramudho Mar’ah, Lutfiatun Nurul Maulinasari, Dhita Mujiburohman, Muhammad Nafa, Kharismatun Nani Kurniasih Norma E Norma Eralita Nur Alimah, Gustin Nuril Millati Nuryati Nuryati Paramita, Farah Rohmah, Dini Rokhmah, Dini Novi Romadlon, Fauzan Basyar Rosita Dwityaningsih Saipul Bahri Septa Katmawanti, Septa Setianingsih, Andika Adhi Tri Widayatno Verry Verry Wahyuni, Oktavia Sri Zaharudin, Zaharudin