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Widya FATRIASARI
R&D Unit for Biomaterials LIPI
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Valorization of oil palm empty fruit bunches into activated carbon: A mini-review Agus Pratama, Andhika Putra; Rohma, Novita Ainur; Elviliana, Elviliana; Nafi'ah, Riris Waladatun; Setyawan, Hendrix Yulis; Sabrina Sunyoto, Nimas Mayang; Fatriasari, Widya; Suhartini, Sri; Jung, Young Hoon; Idrus, Syazwani; Melville, Lynsey
Advances in Food Science, Sustainable Agriculture and Agroindustrial Engineering (AFSSAAE) Vol 7, No 1 (2024)
Publisher : Advances in Food Science, Sustainable Agriculture and Agroindustrial Engineering (AFSSAAE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.afssaae.2024.007.01.9

Abstract

This paper aimed to comprehensively review the potential valorization of oil palm empty fruit bunches (OPEFBs) into activated carbon and its potential application. Activated carbon is carbon processed through dual phases, including carbonization and activation. Firstly, this process converts biomass into carbon thermally with zero to little oxygen conditions. Next, the carbon needs to be activated to stimulate the formation of pores and reduce impurities. The activated carbon’s quality is influenced by the activation process, which can be done physically, chemically, or physiochemically. Activated carbon has an amorphous structure and abundant internal pore structure, thus increasing the surface area. In Indonesia, the quality of active carbon is regulated by Indonesian National Standards or SNI 06-370-1995.  The factors influencing the activation step include activator agent type,  activator agent concentration, activation ratio and time, etc. . Generally, activated carbon can be widely applied to various sectors, such as agriculture (i.e., slow-released fertilizer, fertilizer, etc.), waste treatment (i.e., adsorbent, activator in anaerobic digestion/AD, bioremediation, etc.), gas purification, ceramic membrane, etc. However, further in-depth investigation is required to determine potential scaling-up and commercialization.
Sustainable Plant-Assisted Production of Silver Nanoparticle Hybrids for Antimicrobial Use: Insights from Chromolaena odorata and Patchouli Oil Pebriani, Liska Nova; Kemala, Pati; Idroes, Ghazi Mauer; Fatriasari, Widya; Khairan, Khairan; Idroes, Rinaldi
Grimsa Journal of Science Engineering and Technology Vol. 4 No. 1 (2026): April 2026
Publisher : Graha Primera Saintifika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61975/gjset.v4i1.117

Abstract

This study developed a green synthesis approach for silver nanoparticles (AgNPs) using ethanolic extracts of Chromolaena odorata leaves (LCo) collected from geothermal areas, followed by post-synthesis incorporation of patchouli oil (PO) to improve antimicrobial performance. The synthesis was optimized using Response Surface Methodology (RSM) based on AgNO₃ concentration and pH, with surface plasmon resonance (SPR) as the response indicator. Successful formation of AgNPs was confirmed by characteristic SPR absorption in the visible region. Structural and morphological analyses indicated the involvement of plant-derived functional groups in nanoparticle stabilization, with predominantly spherical particles and some aggregation observed. Antimicrobial testing against Staphylococcus aureus, Escherichia coli, and Candida albicans showed that the PO-AgNPs-LCo system exhibited a slightly higher inhibition zone compared to AgNPs-LCo alone, indicating a marginal enhancement in antimicrobial activity. These results suggest that geothermal-derived plant extracts can be effectively utilized for AgNPs synthesis, while post-synthesis incorporation of natural oils may provide additional functional modification. However, the observed enhancement remains limited, indicating the need for further optimization and mechanistic studies. Overall, this work highlights a simple and eco-friendly route for developing plant-based antimicrobial nanomaterials.
Co-Authors Agus Pratama, Andhika Putra Apip Amrullah Apri Heri Iswanto Apriastini, Marsiti Ashrianis, Devi Nury Bambang Prasetya Budiman, Ismail Danang Sudarwoko Adi Dede Heri Yuli YANTO Deni Zulfiana Dewi Selvia Fardhyanti Dewi Sondari Djarwanto Dyah Ayu Agustiningrum, Dyah Ayu Elviliana, Elviliana Euis HERMIATI Fahriya Puspita Sari Faizatul FALAH Fajriutami, Triyani Ghazi Mauer Idroes Gutari, Sesmi H Hadiyanto hamzah, fajar nur Haniif Prasetiawan Himmi, Setiawan Khoirul I Nyoman Jaya Wistara Idrus, Syazwani Ina Winarni, Ina Irshad , Shagufta Ismayati, Maya Jung, Young Hoon Kemala, Pati Khairan Khairan Khaswar Syamsu Khorshidi, Fatemeh Hassani Kurnia Wiji Prasetiyo Laksana, Raden Permana Budi Lana Nafisyah, Ayu Listya Mustika Dewi Lubis, Muhammad Adly Rahandi Mawarni, Rista Siti Meliana, Yenny Melville, Lynsey Muhammad Ghozali Muryanto Nafi'ah, Riris Waladatun Nanang Masruchin Narto Nissa Nurfajrin Solihat Nurhani Aryana, Nurhani Obie Farobie Ogino, Chiaki Pari, Rohmah Pebriani, Liska Nova Pizzi, Antonio Pratomo, Bagas Ikhasan Rahman, Delicia Yunita Rahmanto, Raden Gunawan Hadi Ramadhan, Kharisma Panji Ratih Damayanti Riksfardini Annisa ERMAWAR Rinaldi Idroes Rohma, Novita Ainur Rusumayanti, Felli Saadatabadi, Ahmad Ramazani Sabrina Sunyoto, Nimas Mayang Septiyanti, Melati Setyawan, Hendrix Yulis Shahnaz Sita Heris Anita Sofianto, Imran Arra'd Sohail, Asma Sri Suhartini Suryanegara, Lisman Swastika Praharyawan, Swastika Teguh DARMAWAN Triwibowo, Dimas Wahyu DWIANTO Wahyu Hidayat Wasrin Syafii Witta Kartika Restu Yadav, Sumit Manohar Yusup AMIN Zia, Sobia