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All Journal JURNAL KIMIA SAINS DAN APLIKASI Alchemy : Journal of Chemistry Tadris: Jurnal keguruan dan Ilmu Tarbiyah Jurnal technoscientia Al Fikra : Jurnal Ilmiah Keislaman Indonesian Journal of Chemistry JURNAL PENDIDIKAN TAMBUSAI Cakrawala : Jurnal Kajian Manajemen Pendidikan Islam dan Studi Sosial Instructional Development Journal JURNAL TEKNOLOGI TECHNOSCIENTIA Jurnal Pusat Studi Pendidikan Rakyat (PUSDIKRA) NUSRA: Jurnal Penelitian dan Ilmu Pendidikan Al-MIKRAJ: Jurnal studi Islam dan Humaniora Makara Journal of Science Molekul: Jurnal Ilmiah Kimia Najah: Journal of Research and Community @-Publik: Jurnal Administrasi Publik Bulletin of Chemical Reaction Engineering & Catalysis Journal Mobile Technologies (JMS) International Journal of Universal Education Jurnal Ilmiah Pendidikan Citra Bakti
Mudasir Mudasir
Department Of Chemistry, Faculty Of Mathematics And Natural Sciences, Universitas Gadjah Mada, Sekip Utara PO BOX BLS 21 Yogyakarta 55281
Religion Arts Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Earth & Planetary Sciences Economics, Econometrics & Finance Education Energy Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Mechanical Engineering Social Sciences Other

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Journal : JURNAL KIMIA SAINS DAN APLIKASI

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The Modification of Coal Fly Ash Adsorbent Using Dithizone Immobilization for Cd(II) Ions Removal Fitriana, Dina; Mudasir, Mudasir; Siswanta, Dwi
Jurnal Kimia Sains dan Aplikasi Vol 28, No 4 (2025): Volume 28 Issue 4 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.28.4.215-224

Abstract

The adsorption of Cd(II) ions onto an adsorbent of dithizone-immobilized coal fly ash (DCFA) was done using batch experiments. In this study, coal fly ash was initially activated using hydrochloric acid, and then its surface was modified by dithizone. The immobilization of activated coal fly ash (ACFA) with dithizone has been carried out to increase the adsorption capacity as the adsorbent of Cd(II) ions. The synthesized adsorbents (DCFA and ACFA) were characterized by FT-IR, XRD, TGA-DTA, adsorption-desorption N2 (BET), and SEM to confirm the successful immobilization of dithizone on the activated coal fly ash. The adsorption parameters, such as pH, adsorbent dosage, contact time, and initial concentration of Cd(II) ions on the adsorption efficiency, were optimized. Optimal adsorption was achieved at pH 7, an adsorbent dosage of 0.1 g, a contact time of 75 minutes, and an initial Cd(II) concentration of 50 mg L-1. The results showed that the adsorption kinetics were found to follow a pseudo-second-order kinetic model, and their adsorption isotherms were best described by the Langmuir model. Kinetics and adsorption isotherm studies suggested that the capacity, equilibrium constant, and energy of the DCFA in adsorbing Cd(II) ions are improved compared to those of non-immobilized ACFA. A sequential desorption study using different solvents of H2O, KNO3, HONH2HCl, and Na2EDTA revealed that binding Cd(II) ions to the adsorbents primarily involves chemisorption. The type of interaction shifts significantly from being predominantly electrostatic or ion-exchange in ACFA to primarily involving chelate complexation in DCFA.
Determination of Kinetic and Thermodynamic Parameters of Pb(II) Ion Adsorption Using Dithizone-Immobilized Coal Fly Ash Rizal B., Muh; Mudasir, Mudasir; Siswanta, Dwi; Muharmi, Melvi; Ardina, Vebria; Setyawan, Teguh; Jaya, Nur; Permatasari, Defia Indah; Tanjung, Revi Maylina
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.29.1.1-9

Abstract

The immobilization of dithizone on the surface of coal fly ash was successfully achieved, as evidenced by Fourier-transform infrared (FT-IR) and X-ray diffraction (XRD) characterization. The dithizone-immobilized coal fly ash (CFA-Dzt) was then used for Pb(II) ion adsorption. The parameters studied included the effects of pH, kinetics, and thermodynamics on Pb(II) ion adsorption using a batch experimental system. The results showed that the optimum pH for Pb(II) adsorption using CFA-Dzt was 5. The adsorption kinetics of Pb(II) ions followed the pseudo-second-order kinetic model, with an adsorption activation energy of 27.280 kJ mol−1. The Langmuir isotherm model best described the adsorption behavior, with a maximum adsorption capacity of 34.13 mg g−1. Thermodynamic analysis revealed Gibbs free energy changes (ΔG°) of 24.630, 25.850, 26.810, and 28.550 kJ mol−1 at 293, 303, 313, and 323 K, respectively. The enthalpy change (ΔH°) of the adsorption at this temperature range was +12.770 kJ mol−1, indicating that Pb(II) ion adsorption on the adsorbent is an endothermic process, and its entropy change (ΔS°) was +127.290 J mol−1, suggesting that the adsorption of Pb(II) ion on CFA-Dzt is dominantly driven by the entropic factor.
Co-Authors Adelin, Muhammad Ady Ferdian Noor Aflizah, Nur Agustiar agustiar ALGUSYAIRI, PARISYI Amyus, Randi Saputra Angglina, Novita Anjar Purba Asmara Ardina, Vebria Astari, Siti Alysha Asteriniah, Femi As’ari, As’ari Bambang Rusdiarso BUDI SETIADI DARYONO Busra, Aminudin Dahrani, Dahrani Dalillah, Aupi Dari, Sri Wulan Darto Darto Defia Indah Permatasari Desi Arisandi Dinata, Yuriyan Dwi Siswanta Edi Suharyadi Fadel, Moh. Fani, Tedy Dwi Fitriana, Dina Fitriyadi, Muhammad Habib Abdullah, Habib Hafis, Gustianto Nur Hamami, Abdul Rasyid Hartono Hartono Heryanto, Edi Hidayat, Rizki Icuk Muhammad Sakir Indrawan, Tiwa Junio Iriani, Atrika Itasaiyah, Itasaiyah JAYA, NUR Khairunnisa, Aulia Liyadi, Muslim Lubis, Nasib Samsuri Madaniyah, Madaniyah Mardhiyah, Mardhiyah Mardiah Mardiah Mardianto Mardianto Mat Syuroh Mawar Mawar, Mawar Melvi Muharmi Muharriyadi, Muharriyadi Muhtady, Dedi Musdiani Musdiani Muti'ah, Siti Nangim, Ngainun Nuniek Herdyastuti Nurhafizah Nurhafizah Nurhasanah Nurhasanah Nurul Hidayat Aprilita Nurwijayanti Rahmawan, Arsuwandika Ramadhan, Muhammad Rizki Rizadiliyawati, Rizadiliyawati Rizal B., Muh Rohadi Rohadi Rohaini, Yespi Romadhona, Miftakhul Romodhon, M Iqbal Roto Roto RR. Ella Evrita Hestiandari S, Rayani V Sabirin Matsjeh Sahrizal, M. Rinaldi Saifuddin Saifuddin Saputra, Aliyus Saputra, Ramli Saputri, Eki Nining Sari, Dwi Nofika Saswita, Saswita Septiani, Iga Setyawan, Teguh Shihabuddin, Ahmad Sibarani, Yetti Erika Sri Juari Santosa SRI RAHAYU Sri Sunarsih Suherman, Suherman Susiana, Carissa Ayu Sutinah Sutinah Syuhada Syuhada Tanjung, Revi Maylina Thahir, Musa Titin Aryani Tjoa, Stanley Evander Emeltan Tri Gunawan, Tri Tri Joko Raharjo Utomo, Edi Yovianti, Ice Veronika Zainuddin, Abdul wahid Zaitun Zaitun Zofir, Tasrif Zuanda, Sary