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All Journal Reaktor JURNAL KIMIA SAINS DAN APLIKASI Prosiding Seminar Nasional Sains Dan Teknologi Fakultas Teknik Jurnal Bahan Alam Terbarukan Jurnal Riset Kimia Jurnal IPTEK Indonesian Journal of Chemistry Indonesian Journal of Chemical Analysis (IJCA) MOTIVECTION : Journal of Mechanical, Electrical and Industrial Engineering Budapest International Research and Critics Institute-Journal (BIRCI-Journal): Humanities and Social Sciences International Journal of Engineering, Science and Information Technology Relativitas : Jurnal Riset Inovasi Pembelajaran Fisika Mechanical Engineering for Society and Industry Chemical Engineering Journal Storage (CEJS) Jurnal Teknologi Kimia Unimal The International Conference on Education, Social Sciences and Technology (ICESST) Journal Of Carbazon Jurnal Malikussaleh Mengabdi JURNAL PERSEGI BULAT Jurnal Polimesin Jurnal Solusi Masyarakat Dikara Advance Sustainable Science, Engineering and Technology (ASSET) Jurnal Bahan Alam Terbarukan
Rozanna Dewi
Universitas Malikussaleh
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Journal : JURNAL KIMIA SAINS DAN APLIKASI

 1 
Optimization of Methylene Blue Dye Adsorption in Fixed Bed Column Packed with Tea Waste via Response Surface Methodology Novi Sylvia; Rozanna Dewi; Zulnazri Zulnazri; Hendi Setiawan; Dinda Humaira; Mutia Reza
Jurnal Kimia Sains dan Aplikasi Vol 26, No 8 (2023): Volume 26 Issue 8 Year 2023
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jksa.26.8.310-317

Abstract

Tea waste is a low-cost alternative material for making adsorbent to remove methylene blue from synthetic dye wastewater perpetually. Optimization of the adsorbent process utilized Response Surface Methodology (RSM) and a continuously operating system in a fixed bed column. The independent variables in the research are X1 (bed height), X2 (contact time), and X3 (flow rate). The dependent variable is Y1 (removal efficiency) with a matrix design by Box-Behnken. The optimum condition of methylene blue (MB) B removal was found at X1=16 cm, X2=90 min, and X3=4 L/min with an adsorption efficiency of 90.45%. After the activation and adsorption of MB dye, the complete FTIR spectrum shows a distinct peak at 2933.7 cm-1. The results of the EDX analysis performed on tea waste reveal the presence of nitrogen (element N) following the adsorption process. This observation strongly suggests that the tea waste has effectively absorbed MB, as nitrogen is a constituent element found in the molecular structure of MB.
Adsorption of Methyl Red Dye on Fixed-Bed Column Using Bottom Ash Adsorbent from Palm Oil Mill Waste Sylvia, Novi; Dewi, Rozanna; Hasfita, Fikri; Maulinda, Leni; Wusnah, Wusnah; Azhari, Azhari; Sigian, Zikri Husni; Putri, Balqis Eka; Fitriani, Fitriani
Jurnal Kimia Sains dan Aplikasi Vol 28, No 5 (2025): Volume 28 Issue 5 Year 2025
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jksa.28.5.260-266

Abstract

Methyl red is an azo compound widely applied in the textile industry as a fabric dye. Methyl red is very difficult to decompose because it is stable to light, temperature, and oxidation. One of the simplest and low-cost methods is adsorption. This study aims to determine the characteristics of bottom ash as an adsorbent and analyze the adsorption process with a fixed-bed column system. The research was conducted by varying the flow rate of 5, 10, and 15 L/min, adsorbent bed height of 4, 8, and 12 cm, and contact time of 60, 120, and 180 minutes. The highest removal efficiency, 93%, was achieved at a contact time of 180 minutes, a flow rate of 5 L/min, and a bed height of 12 cm. The physical properties of the bottom ash adsorbent include a pore volume of 0.0032 cm3/g, a specific surface area of 89.801 m2/g, and an average pore size of 58.523 nm. The maximum adsorption capacity was found to be 0.850 mg/g. The adsorption process of methyl red onto bottom ash follows the Langmuir isotherm model.
Effect of Polylactic Acid on Mechanical, Chemical, Thermal, Morphology, Water Absorption, and Biodegradability Characteristics of Degradable Plastic from Durian Peel Waste Retnowulan, Sri Rahayu; Dewi, Rozanna; Yosi, Andre; Ananda, Aldila; Riza, Medyan; Nurlaila, Rizka
Jurnal Kimia Sains dan Aplikasi Vol 29, No 1 (2026): Volume 29 Issue 1 Year 2026
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jksa.29.1.46-57

Abstract

Durian peels consist of cellulose, a potential base material for producing sustainable products, particularly degradable plastics. This study examines the impact of polylactic acid (PLA) blends on the degradable plastics derived from durian peel (Durio zibethinus). The mechanical characteristics of the degradable plastics: tensile strength of 2.5671–9.3498 MPa, elongation of 31–96%, and Young’s modulus of 161.32–219.95 MPa. The analysis of the compound revealed the presence of the alcohol monomer (O-H), alkanes and aromatic rings (C-H), carbonyl (C=O), and alkenes (C-O) groups. The potential for soil microbes to decompose these groups is also a consideration, given their hydrophilic nature, which enables them to bind to water. X-ray fluorescence (XRF) analysis of the degradable plastic sample revealed the presence of 13 elements: Mg, Ca, Al, P, Fe, Cl, K, Sr, Zn, Sc, Rh, S, and Si. In this study, no harmful metal contaminants (Pb, Hg, or Cd) were identified. Thermal analysis, encompassing a temperature range from 357.67°C to 443.67°C, has been instrumental in identifying the phase transition that marks the onset of extreme weight loss during crystallization. Morphological analysis revealed incomplete dissolution, leading to a nonuniform shape. Solubility is directly proportional to the duration of the stirring process. The degradable plastic with the least swelling is composed of 3.5 g of cellulose and 3 g of PLA, exhibiting a degree of swelling of 4.89%. The degradable plastic is predicted to decompose most rapidly after 56 days with a PLA content of 3 g. This experimental result aligns with the provisions outlined in ASTM D2096, a standard that establishes a maximum time limit of 180 days for the degradation of plastics.
Co-Authors Abrar Muslim Adha, Muhammad Ikhwanul Adi Saputra Ismy Adi Setiawan Adrin, Prista Agam Muarif Agustinus Purna Irawan Ahmad Fikri Ahmad Fikri Ahmadi Ahmadi Aida Safitri Ainun, Sarifah Almia Permata Putri Amalia, Nabuia Amiratul Husna Amri Amri Ananda Monarita Ananda, Aldila Angga Tri Agusna PA Anggi Dwi Safitri Anggraini, Dea Riski Annisa Ramadina Anugrah Yunika Tambunan Ardiansyah, Zul Fadly Ari Irawan Ari Salahudin Arif Maulana Aulia, Rauzatul Authar, Mhammad Azhari Azhari Azhari Azhari Chairina Chairina Chatarina Umbul Wahyuni Cionita, Tezara Cut Milya Dahliana Abdullah Deasy Siska Desriani, Chintiara Devi, Sri Marlia Dewi Lestari Dinda Humaira Eddy Kurniawan Effendy, Ahmad Hidayat Eni Suryani Etanto Heiliano Wijayanto Fachry Abda El Rahman Fadhli Syamsudin Fahirul Muhar Faisal . Faisal Faisal Faisal Faisal Faisal Faisal Faisal Faisal Farah Irda Farid Yoanda Fatnia, Fatnia Faturrahman, Muhammad Feni Lestari Berutu Fibarzi, Wiza Ulfa Firda, Hanisyah Fitriani Fitriani Fitriani Fitriani Fitriyana, Deni Fajar Gunawati Gunawati Hadi, Agung Efriyo Halimatus Sakdiah Hanif, Hanif Harahap, Nurul Aulia Hendi Setiawan Holila, Manna Husni Husin Ibrahim, Ishak Ilhami, Gita Ayu Imran, Al Ichlas Indra Nofriadi Iqbal Kamar Ishak Ishak Ishak Ishak Jalaluddin Jalaluddin Jalaluddin Jalaluddin Jalalul Akbar, Said Jamiluddin, Jamiluddin Jannah, Rouzatul Janni, Miftahul Jasmani Jasmani Jullimursyida Junaedi, Thomas Kalatharan, Sujentheran Nair Kamar, Iqbal Khalsiah Khalsiah Kuniawan, Eddy Leni Maulinda, Leni Lidia Manik Lukman Hakim Lukman Hakim M Ali Anto M Riza Mahdayani Sinaga, Citra Puspita Maizuar Maizuar Masrullita Masrullita Masrullita Masrullita Masrullita, Masrullita Mat Rejab, Mohd Ruzaimi Mat Rejab, Mohd. Ruzaimi Mawardati Mawardati Medyan Riza Medyan Riza Melan Amanah, Ananda Meriatna Meriatna Milarahma Yulianti Mohd Ruzaimi Mat Rejab Muammar Khadafi Muhammad Abrar Muhammad Daud Muhammad Farhan Muhammad Ikhwanul Adha Muhammad Muhammad Muhammad Muhammad Muhammad Muhammad Muhammad nur Ichsan Tamiogy Muhammad Subhan Muhammad, Muhammad Muji Setiyo Muliadi Mulyawan, Rizka Muthawali, Dede Ibrahim Muthia Septiana Muthia Septiana, Muthia Mutia Reza Nabila Adhani Nainggolan, Yuni O Nasrul ZA Nasrul ZA, Nasrul Nasrun, Mahdalena Novi Sylvia Nur Annisa Nur rizqi Fattah Lubis Nurdiah, Ika Nurlaila, Rizka Nurmazaya, Vini Nurul Khumaida Oktaviani oktaviani Pane, Nurul Anisa Prayogo, Wisnu Putri, Balqis Eka putri, intan nanda Putri, Melani Annisa Rafika Rafika Rahayu Retnowulan, Sri Rahmi Rahmi Rahmi, Delfi Ramadhan, Cindia Ramdhani, Nevia Arbi Ratna Sari Raudhatul Ulfa Reci Anggraini Retnowulan, Sri Rahayu Ridwandi Rizka Mulyawan Rizka Mulyawan Rizka Mulyawan Rizka Mulyawan Rizka Nurlaila Rizkya Faradaiza Rizqon Hasibuan Rouzatul Jannah Samsudin Anis Shintia Clarita Sigian, Zikri Husni Silitonga, Hanna Amaliah Siregar, Januar Parlaungan Siti Maulidya Salsabila Sry Rahmadani Sulhatun Sulhatun Suryati Suryati Syamsul Bahri Syamsul Bahri Syamsul Bahri Syarifah Yulisa Syurvani Else Putri Tarigan, Jhodi Okta Albiqho Tasya Maidayanti Teuku Rihayat Tezara Cionita Vania, Sherryl Veithzal Rivai Zainal Wijayanto, Etanto Heiliano Wisnu Prayogo Wiyani, Sri Wiza Ulfa Fibarzi Wusnah Wusnah, Wusnah Yani, Firda Tirta yanti, eva Yopi Aji Akbar Yosi, Andre Yulia Yulia Yunardi, Y Yuris Setyoadi Zahratun Mauliza Zainuddin Ginting Zikri Amarullah Surbakti Zulnazri Zulnazri, Z Zurrahmi, Zurrahmi