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Technopreneurship and Market Feasibility of Modified Carrageenan Hydrogel for Industrial Heavy Metal Remediation Dulanlebit, Yeanchon Henry; Hernani, Hernani; Liliasari, Liliasari; Amran, Muhammad Bachri; Pangilinan, Greian April
Aptisi Transactions On Technopreneurship (ATT) Vol 8 No 1 (2026): March
Publisher : Pandawan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34306/att.v8i1.622

Abstract

Heavy metal pollution in aquatic systems increases the need for sustainable and efficient natural adsorbent materials, and carrageenan extracted from Eucheuma cottonii, which contains O–H, S=O, C–O–S, and 3,6-anhydrogalactose functional groups, offers strong potential for binding metal ions. However, the adsorption efficiency of natural carrageenan for Copper (Cu2+) and Cadmium (Cd2+) ions remains limited, which frames the central problem of this study. In addressing this issue, the method employed involves synthesizing carrageenan hydrogel through alkaline extraction of Eucheuma cottonii and evaluating its adsorption capacity under controlled experimental conditions. The hydrogel was characterized and tested at pH 6–7, with a contact time of 90 minutes, an initial concentration of 200 mg/L, and an adsorbent mass of 6 g, followed by kinetic and isotherm modeling to analyze adsorption behavior. Based on the Findings, ionic exchange interactions between sulfate ester groups of K-carrageenan and metal cations significantly enhance adsorption performance, with the adsorption process following a pseudo-second-order kinetic model and the Freundlich isotherm providing the best fit R2 > 0.90, indicating heterogeneous multilayer adsorption. In the Conclusion, the chemically modified carrageenan hydrogel demonstrates effective adsorption of copper and cadmium ions and presents strong potential as an eco-friendly and efficient biomaterial for heavy metal remediation.
Exploring Learning Obstacle of Pre-Service Chemistry Student Towards Education for Sustainability on the Topic of Biodiesel: A Preliminary Study for Developing Didactic Design Aldini Aulia; Hernani Hernani; Asep Supriatna
Jurnal Penelitian Pendidikan IPA Vol 10 No 12 (2024): December
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v10i12.8940

Abstract

This study aims to identify the learning obstacles experienced by preservice chemistry teachers in studying the biodiesel topic in the energy section. The research method employed is qualitative descriptive, with the instrument is interview guide sheet. Participants in this study were students of the program study of Chemistry Education. The result of the interviews with prospective chemistry teachers reveals that the primary learning obstacle related to the biodiesel topic are epistemological learning obstacle, with many students struggling to understand and apply concepts in depth. While students generally grasp the basic differences between renewable and non-renewable energy and the benefits of biodiesel, they lack detailed knowledge about biodiesel production processes and potential feedstocks. Additionally, there is a reliance on provided materials and insufficient initiative in seeking additional information. To address these challenges, it is essential to design more structured in learning experiences
Co-Authors A. Mudzakir A. Suhandi Abdul Latip, Abdul Abdullah, Norazilawati Abraham Mora Adek Diah Murti Adi Aliyan Agus Kamaludin, Agus Agustini, Nurlaela Ahmad Aminudin Aldini Aulia Alfina Dzabillah Zahira Alfira Julian Pratiwi* Ali Kusrijadi Anak Agung Istri Sri Wiadnyani Anakotta, Raisa Anas Santria Andita Nur Sakinah Lili Budiarti Anggriawan, Robby Ani Karolina Anis Muyassaroh Anita Fibonacci Anita Fibonacci, Anita Anna Permanasari Anwar, Sjaepul Asep Kadarohman Asep Kadarohman Asep Supriatna Asep Supriatna, Asep Asep Suryatna Aswati Asri, Aswati Atep Rian Nurhadi Aulia Rahim Aulia, Aldini Azizah, Naila Buchari Buchari Budiati, Andita Nur Sakinah Lili Budiman Anwar Cece Nurhidayat Cecep Jaenudin Depi, Siska Sintia Devi Pratiwi Sudrajat Devita Marlina Venessa Dewi Sanusi Noor Dewi Sulistyowati, Dewi Dian Mustikasari Diana Rochintaniawati Dieni, Wahyu Eka Fath Dwi Siti Hartinah Eny Ambarawati Eka Cahya Prima Eko Puji Rahayu Elah Nurlaelah Eneng Saidatus Syadiah Eri Ria Budiarty F Hidayat F. M. T. Supriyanti Fadhilah, Anita Fadilawati, Siti Fahmi, Jam'an Fauzi, Billy Oktora Abdillah Fazarwati, Reza Febrian Andi Hidayat Febrizal Ujang Fitri Khoerunnisa Fitri Khoirunnisa Fitria Nurdianti Galuh Yuliani Habiby, Iqbal Hanafi, Ainul Ahmadsyah Hartono, Rudi Haunan, Vito Winata Heli Siti Halimatul Hidayat, Lina Nurlina Husna, Nisyya Syarifatul Ida Kaniawati Ika Nur Fitriani Indah Sari Indah Sari Indra Tri Gunawan Iqbal Musthapa Irmawati Irmawati Iwan Muhamad Ramdan Kadarohman*, Asep Kaniawati*, Ida Lee, Tien Tien Lestari, Ida Ayu Indira Dwika Liliasari , Mahmudah Mahmudah Marfuatun Marfuatun Mellyzar, Mellyzar Mochammad Imron Awalludin Monica Prima Sari Mr Amprasto Mr Buchari Mr Sumar Hendayana Muhammad Bachri Amran Muhammad Nurul Hana Muminah, Qonita Murti*, Adek Diah Murti, Adek Diah Musa'adah, Siti Muslim Muslim Muyassaroh, Anis Nabilatunnisa, Izza Nahadi Nahadi Nahadi*, Nahadi Nais, Miarti Khikmatun Nanang Winarno Nurhadi, Atep Rian Nurpratiwi, Febrianty Nursiwan, Wimbi Apriwanda Omay Sumarna P Siahaan P Sinaga Pangilinan, Greian April Park, Do-Yong Parlindungan Sinaga Perdani, Anggie Siti Permasari, Ninda Pratiwi, Alfira Julian Purba, Ester Yuliati Cristina Purwanti purwanti Ragadhita, Risti Ramadany, Lisa Dewi Razani, Ahmad Nafran Riandi Riandi Rini Solihat Rira Octa Ningsi* Risfaheri Risfaheri Roslan, Roslinawati Mohd S. Mulyanti Salsabila, Syifa Ayugea Santria, Anas Septiyanto, Arifin Siti Aisyah Siti Latifah Nata Siti Sriyati Soja Siti Fatimah Soja Siti Fatimah Solfarina Solfarina Solfarina, Solfarina Sri Agustina, Sri Sri Mulyani Sri Mulyani Sri Wahyuni Sri Wahyuni Suci Rizki NA Suharyadi S.Pd. Susilawati, Aay Sutrasman Sutrasman Suwandi, Tri Syam, Sri Rahmadani Syifa Ayugea Salsabila T. R. Ramalis TATANG HIDAYAT, TATANG Tatit K. Bunasor, Tatit K. Taufik Ramlan amalis Tias, Bachrul Titen Pinasti Triannisa Rahmawati, Triannisa V A Tonjo Wafi, Wulanda Wahyu Eka Fath Dieni Wawan Setiawan Wawan Setiawan Wawan Setiawan Widyaningsih, Mia Wiji Adji Wiwi Siswaningsih Yaya Sonjaya Yeanchon Henry Dulanlebit Yeni Setyowati* Yuliani, Galuh Yulina, Indah Karina Yusmaita, Eka Zackiyah Zackiyah