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All Journal Prosiding Semnastek IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) ALCHEMY Jurnal Penelitian Kimia Jurnal Distilasi WIDYA LAKSANA Sainmatika: Jurnal Ilmiah Matematika dan Ilmu Pengetahuan Alam Jurnal Inovator Barometer Jurnal Abdimas Mandiri Best Journal (Biology Education, Sains and Technology) Jurnal Abdi Insani AJARCDE (Asian Journal of Applied Research for Community Development and Empowerment) Aptekmas : Jurnal Pengabdian Kepada Masyarakat PROSIDING SEMINAR NASIONAL PENELITIAN DAN PENGABDIAN KEPADA MASYARAKAT (SNPPM) UNIVERSITAS MUHAMMADIYAH METRO Integrasi : Jurnal Ilmiah Teknik Industri Bulletin of Chemical Reaction Engineering & Catalysis International Journal of Information Engineering and Science
Eka Sri Yusmartini
Universitas Muhammadiyah Palembang
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Pengaruh Berat Karbon Aktif Dari Ampas Tebu dan Lama Perendaman Terhadap Kualitas Minyak Goreng Bekas Mardwita; Eka Sri Yusmartini; Nindia Selviana
Jurnal INOVATOR Vol. 5 No. 1 (2022): Jurnal INOVATOR
Publisher : LPPM Politeknik Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37338/inovator.v5i1.148

Abstract

The amount of used cooking oil is increasing along with human activities. Used cooking oil that is disposed directly into the environment will give a negative impact on health and the quality of the environment, therefore it is necessary to purify the used cooking oil so that the used cooking oil can be reused. In this study, used cooking oil that has been used with heating time of 3 hrs, 5 hrs, and 7 hrs was used. The used cooking oil was purified using activated carbon made from 100 mesh bagasse with variations in weight of 2.5 g, 5 g, and 7 g, soaking time of activated carbon in used cooking oil were 24 hrs, 48 ​​hrs, and 72 hrs. The analysis used is the analysis of water content, free fatty acid content, and the amount of saponification. The results showed that the water content and saponification rate decreased with the length of contact time and the weight of activated carbon. The lowest free fatty acid content was produced when using activated carbon 7.5 g and contact time for 24 hrs.
Synthesis and Characterization of an Adsorbent from Chicken Eggshell and Its Application for Methyl Orange Eka Sri Yusmartini; Mardwita Mardwita; Eko Ariyanto; Wahyu Triaji Rahadianto; Ikbal Oktaviansyah; Muhammad Dzaky Muzhaffar
ALCHEMY Jurnal Penelitian Kimia Vol 22, No 1 (2026): March
Publisher : UNIVERSITAS SEBELAS MARET (UNS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/alchemy.22.1.96880.170-178

Abstract

Eggshell is a part that protects egg components from various external threats, including chemical, physical, and biological factors. This study aimed to obtain an adsorbent from chicken eggshells using physical and chemical activation techniques. The quality of the eggshell-derived adsorbent was assessed and compared with the Indonesian National Standard (SNI) 1995, with a focus on parameters such as ash content, moisture content, and iodine absorption. The adsorbent obtained was applied to a solution of methyl orange, and Fourier transform infrared spectroscopy (FTIR) analysis was conducted before and after the adsorption process. Furthermore, the study stages include adsorbent preparation, activation, and adsorption. The adsorbent weight for this process was 17 grams, with time intervals of 15, 30, 45, 60, and 75 minutes. The results showed that both physically activated as well as physical and chemical activated adsorbents met the SNI 1995 standard, based on the parameters of water content (1.73% and 2.86%), ash content (8.18% and 6.745), and iodine absorption (761.40 mg/g and 774.09 mg/g). FTIR analysis confirmed the presence of a hydrocarbon and an OH group in the structure before and after adsorption. The optimum methyl orange adsorption capacity was achieved at an adsorbent mass of 17 grams and a contact time of 60 minutes, resulting in removal efficiencies of 20.38% for physical activation and 24.11% for physical and chemical activation.
Simulation Study of Propylene Glycol Formation from Propylene Oxide and Water: Effect of Reactor Type, Reactant Ratio, Temperature, and Reactor Configuration Eko Ariyanto; Eka Sri Yusmartini; Robiah Robiah; Feby Ardianto
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Vol 9, No 1 (2024): February 2024
Publisher : IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24845/ijfac.v9.i1.26

Abstract

This study investigates the influence of reactor type, reactor configuration, reactor temperature, and reactant ratio on the formation of propylene glycol from propylene oxide and water using HYSYS simulation software. The examined reactor types include Continuous Stirred Tank Reactors (CSTR) and Plug Flow Reactors (PFR). The impact of reactant ratio is explored by varying the mole ratio of propylene oxide to water. The effect of temperature is studied by altering the reaction temperature from 24 to 40 °C. HYSYS simulation results reveal that PFR yields the highest conversion compared to CSTR. Furthermore, consecutive CSTR configuration produces higher conversion than parallel CSTR configuration. Additionally, an increase in reaction temperature from 24 to 40 °C enhances the conversion of propylene oxide to propylene glycol. The reactant ratio 1:1 (propylene oxide to water) yields the highest conversion compared to other reactant ratios. The implications of these findings are to provide insights into more efficient and economical propylene glycol processes. The study suggests that PFR configuration, consecutive CSTR configuration, elevated reactor temperatures, and optimal reactant ratios can significantly improve the efficiency of propylene glycol formation.Keywords: Propylene Glycol, CSTR, PFR, Conversion, HYSYS Simulation
Optimization of Coal Fly Ash Heating Temperature as an Adsorbent to Improve Acid Mine Water Quality Thoufiq Ridhowan; Eka Sri Yusmartini; Dian Kharismadewi
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Vol 9, No 3 (2024): October 2024
Publisher : IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24845/ijfac.v9.i3.139

Abstract

Fly ash, a fine dust from coal combustion in steam power plants, is an unused waste material that can be repurposed as a low-cost adsorbent. One type of adsorbent that can be synthesized from fly ash is zeolite-like material (ZLM), which has a porous structure capable of absorbing molecules smaller than or equal to its cavity size. In this study, untreated and heat-activated fly ash at 100, 200, and 300°C was used as an adsorbent for acid mine water. Adsorbent mass varied between 6, 8, 10, 12, and 14 g, mixed with 130 mL of mine water and stirred at 150 rpm for 60 minutes. The results showed that heat activation increased the surface area of the fly ash adsorbent, reaching 22.658 m²/g at 300°C. Heat-treated fly ash at 200 and 300°C showed a more significant reduction in Fe and Mn levels, especially with 8 g of adsorbent. Additionally, all adsorbents, whether heated or not, raised the pH of the acid mine water. The total suspended solids (TSS) were reduced to meet quality standards using 14 g of adsorbent heated to 300°C. These results indicate that coal fly ash adsorbent can be effectively applied for treating acid mine water
Harnessing Electrochemical Processes for Enhanced Struvite Crystallization: A Comprehensive Review Eko Ariyanto; Eka Sri Yusmartini; Gusmiatun Gusmiatun; Fatimah Fatimah; Mitayani Purwoko
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Vol 10, No 1 (2025): February 2025
Publisher : IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The recovery of nutrients from contaminated water and wastewater can effectively mitigate both the nutrient burden on water resources and the associated environmental issues affecting aquatic ecosystems. This approach presents a valuable solution towards achieving environmental and societal sustainability. Consequently, struvite crystallization technology has emerged as a promising method for nutrient recovery, as the resulting precipitate can be recycled as a natural fertilizer. This review aims to elucidate the characteristics of struvite and provide insight into the fundamental process of crystallization. Furthermore, it comprehensively discusses the various variables that influence struvite crystallization, with a special focus on its application in urine-contaminated water using electrochemical methods. The review also highlights the advantageous on environmental and economic aspects. In addition, the limitations of struvite crystallization technology are examined, and future research prospects are explored, particularly in the context of electrochemical techniques which offer innovative solutions for controlled nutrient extraction. Ultimately, this work serves as a foundational resource for the future utilization of struvite crystallization technology in nutrient recovery, in response to the escalating environmental challenges and depletion of natural resources.Keywords: Struvite formation, electrochemical process, magnesium anode, struvite crystallization, natural fertilizer
Model Penilaian Kinerja Green Supply Chain Management dengan Pendekatan Green Supply Chain Operation Reference Untuk Mengurangi Pencemaran Lingkungan Rurry Patradhiani; Bima Anugrah; Nidya Wisudawati; Yasmin Yasmin; Eka Sri Yusmartini
Integrasi : Jurnal Ilmiah Teknik Industri Vol 8, No 1 (2023): Integrasi : Jurnal Ilmiah Teknik Industri
Publisher : Universitas Muhammadiyah Palembang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32502/js.v8i1.5996

Abstract

Green Supply Chain Management didefenisikan sebagai aktifitas manufaktur yang ramah lingkungan (Green Manufacturing), kegiatan pendistribusian yang juga ramah lingkungan (Green Distribution) serta reserve logistic. UKM Kain Jumputan merupakan salah satu UKM yang ada di Kota Palembang. Penelitian ini mengenai penilaian kinerja Green Supply Chain Management di UKM Kain Jumputan agar UKM ini dapat terus mengembangkan usahanya dengan baik serta memberikan rekomendasi perbaikan berdasarkan hasil pengukuran kinerja yang telah dilakukan. Penelitian ini menggunakan metode Green SCOR Untuk mengukur kinerja Green Supply Chain Management kemudian didukung dengan metode pembobotan AHP. Dari hasil perhitungan diperoleh nilai kinerja sebesar 79,4. Hal ini berarti UKM tersebut dalam kategori Good. Namun terdapat 6 KPI dari 24 KPI yang membutuhkan perbaikan. Perbaikan yang disarankan pada UKM diantaranya Percentage supplier with an EMS, Recycleable waste, Sewege treatment plant cost, Defective product recycleable, Percentage of solid waste recycling, Percentage of waterwaste recycling Green Supply Chain Management is defined as environmentally friendly manufacturing activities (Green Manufacturing), distribution activities that are also environmentally friendly (Green Distribution) and reserve logistics. JUmputan Cloth UKM is one of the UKM in Palembang City. This research is about evaluating the performance of Green Supply Chain Management in the Jumputan Fabric UKM so that these UKM can continue to develop their business well and provide recommendations for improvements based on the results of performance measurements that have been carried out. This study uses the Green SCOR method to measure the performance of Green Supply Chain Management and is supported by the AHP weighting method. From the calculation results obtained a performance value of 79.4. This means that the UKM is in the Good category. However, there are 6 out of 24 KPIs that need improvement. Suggested improvements for SMEs include Percentage supplier with an EMS, Recycleable waste, Sewege treatment plant costs, Recycleable Defective products, Percentage of solid waste recycling, Percentage of waterwaste recycling
Penyuluhan Mengenai Desain, Logo, dan Slogan untuk Meningkatkan Pemasaran Produk Bank Sampah Kenanga Palembang sri martini; Erna Yuliwati; Eka Sri Yusmartini; Elfidiah Martini; Dian Kharismadewi; Mardwita Martini; Eko Ariyanto
Jurnal Abdimas Mandiri Vol. 10 No. 2 (2026)
Publisher : UNIVERSITAS INDO GLOBAL MANDIRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36982/jam.v10i2.7560

Abstract

Permasalahan umum yang dihadapi oleh sebagian besar UMKM saat ini adalah ketatnya persaingan untuk memasarkan produk yang dapat bersaing dengan berbagai produk sejenis yang diproduksi oleh industri skala besar yang telah lebih dulu dikenal masyarakat. Salah satu hal yang menjadi tantangan bagi produk UMKM dalam persaingan di pangsa pasar umum dan komersial adalah masih relatif terbatasnya kemampuan untuk membentuk citra atau branding produk. Dengan demikian, Produk UMKM tidak hanya dituntut untuk dapat memperbaiki kualitas produk itu sendiri, tetapi yang tidak kalah pentingnya adalah meningkatkan citra produk dengan cara memberikan desain kemasan, logo, dan slogan yang menarik dan spesifik terhadap produknya.  Identifikasi visual tersebut diharapkan dapat membuat produk lebih mudah dikenali saat bersanding dengan produk sejenis di pangsa pasar komersial.  Penyuluhan dan pelatihan yang diberikan kepada masyarakat pelaku UMKM di Bank Sampah Kenanga di Kawasan 19 Ilir Kotamadya Palembang menunjukan peningkatan yang signifikan. Perbandingan hasil pra-test dan post-test pada sesi evaluasi terhadap wawasan dan keterampilan peserta terkait citra produk mereka yang berbentuk sabun padat, eco enzim, dan anyaman dekorasi ruangan berbahan dasar limbah organik menunjukan peningkatan sebesar 45%
Co-Authors Abdullah Abdullah Ario Oktora Aseptianova Aseptianova Aseptianova Aseptianova Aseptianova Aseptianova Aseptianova Atikah Atikah Atikah Atikah Atikah Bima Anugrah Eko Ariyanto Elfidiah Elfidiah Martini Elvidiah Elvidiah Fatimah Feby Ardianto Gusmiatun Gusmiatun Hery Gunawan Ikbal Oktaviansyah Innike Abdillah Fahmi Junanda Marza Kaswari, Suli Cahaya Kharismadewi, Dian Komaini, M Ali Mardwita Mardwita Martini Meylinda Rahayu Mitayani Purwoko Muhammad Dzaky Muzhaffar Muhammad Faizal Mujiharti, Mujiharti - Nidya Wisudawati Nindia Selviana Noka, Isara Abda Oktaviansyah, Ikbal Parwanti, Sri Rahadianto Wahyu Triaji Rifdah, Rifdah Rifdah, Rifdah Rinjani, Retno - Rivaldo, M. Chobind Robiah Robiah Rurry Patradhiani Septiaranisi, Eci Dwi Sri Martini Sri Martini Suli Cahaya Kaswari Sulton Nawawi Thoufiq Ridhowan Wahyu Triaji Rahadianto Yasmin Yuliwati, Erna Zuber Angkasa