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All Journal VALENSI EKSAKTA: Journal of Sciences and Data Analysis Reaktor JURNAL KIMIA SAINS DAN APLIKASI Prosiding Seminar Nasional MIPA Wahana Matematika dan Sains Alchemy : Journal of Chemistry JURNAL PIJAR Prosiding Pendidikan Sains Journal of Mathematical and Fundamental Sciences Elkawnie PROSIDING SEMINAR KIMIA Jurnal Litbang Industri INDONESIAN JOURNAL OF PHARMACY Al-Kimia Sains Natural: Journal of Biology and Chemistry Chemistry Indonesian Journal of Chemical Research ALKIMIA : Jurnal Ilmu Kimia dan Terapan Jurnal Ilmiah Teknik Kimia Jurnal Inovasi Teknik Kimia Molluca Journal of Chemistry Education (MJoCE) Jurnal Riset Teknologi Pencegahan Pencemaran Industri Jurnal Pijar MIPA Jurnal Farmasi Etam Jurnal Ilmiah Berkala: Sains dan Terapan Kimia Jurnal Litbang Industri Jurnal Natural Molekul: Jurnal Ilmiah Kimia Bulletin of Chemical Reaction Engineering & Catalysis JURNAL REKAYASA KIMIA & LINGKUNGAN
Dwi Siswanta
Chemistry Department , Faculty Of Mathematics And Natural Science, Gajah Mada University, Sekip Utara, Yogyakarta, Indonesia
Agriculture, Biological Sciences & Forestry Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Control & Systems Engineering Earth & Planetary Sciences Education Energy Engineering Environmental Science Immunology & microbiology Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Medicine & Pharmacology Neuroscience Physics Social Sciences

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Journal : JURNAL KIMIA SAINS DAN APLIKASI

 1 
Sintesis Oktileugeniloksi Etanoat dari Eugenol Lusiana, Retno Ariadi; Siswanta, Dwi
Jurnal Kimia Sains dan Aplikasi Vol 6, No 1 (2003): Volume 6 Issue 1 Year 2003
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2604.95 KB) | DOI: 10.14710/jksa.6.1.6-10

Abstract

Telah disintesis senyawa ester oktil eugeniloksi etanoat dari bahan dasar eugenol dengan metode Furnish. Analisisstruktur dilakukan secarafisiko-kimia, seperti kromatografi gas, 1H-NMR, infra merah dan GC-MS. Hasilyang diperolehmenunjukkan bahwa senyawa oktil eugeniloksi etanoat berhasil didapatkan melalui reaksi esterifikasi
Pemanfaatan Oktil Eugeniloksi Etanoat Hasil Sintesis sebagai Plasticizer Membran Polimer Cair Elektroda Selektif Ion Lusiana, Retno Ariadi; Siswanta, Dwi
Jurnal Kimia Sains dan Aplikasi Vol 5, No 3 (2002): Volume 5 Issue 3 Year 2002
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (5042.085 KB) | DOI: 10.14710/jksa.5.3.11-14

Abstract

Dua plasticizer, dibenzil eter  (DBE) dan oktil eugeniloksi etanoat (OEE) dipelajari untuk mengetahui kemampuannya dalam membran polimer ESI (Elektroda Selektif Ion) perklorat dengan senyawa aktif  TOMA-Cl (tetra oktil metil amonium klorida). Hasil penelitian menunjukkan dari hasil pengukuran terhadap karakteristik ESI perklorat didapatkan bahwa penggunaan DBE memberikan hasil yang lebih baik dibandingkan dengan OEE sebagai plasticizer.  Secara umum, interaksi yang terjadi antara fasa membran dengan anion mengikuti kaedah seri Hofmeister.
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 ., Jumina Abdul Karim Zulkarnain Abner Tonu Lema Adhitasari Suratman Adhitasari Suratman Adhitasari Suratman Adhitasari Suratman Agnes Dyah Novitasari Lestari Agung Abadi Kiswandono Ahmad Nasir Pulungan Akhmad Damsyik Aloisius M. Kopon Aloisius Masan Kopon Anjar Purba Asmara Anselmus Boy Baunsele Ardina, Vebria Bambang Kuswandi Bambang Kuswandi Bambang Rusdiarso Bambang Rusdiarso Bastiana, Adinda Putri Defia Indah Permatasari Desi Suci Handayani Dhony Hermanto Eko Sugiharto Eko Sugiharto Eni Kartika Sari Erly Grizca Boelan Faderina Komisia Febi Indah Fajarwati Febriasari, Arifina Febriasari, Arifina Fidelis Nitti Fitriana, Dina Fitrilia Silvianti Girsang, Ermi Herdiansyah Herdiansyah Herdiansyah Herdiansyah Hidetaka Kawakita Hildegardis Missa JAYA, NUR Johnson N Naat Jumina Jumina Jumina Jumina Jumina Jumina Juniva Laila Sihombing, Juniva Laila Karelius Karelius Keisuke Ohto Kopon, Aloisius Masan Leba, Maria A. U. M. Cholid Djunaidi Maria A. U. Leba Maria Aloisia Uron Leba Maria Benedikta Tukan Melvi Muharmi Merpiseldin Nitsae Mudasir Mudasir Mudasir Mudasir Mudasir Mudasir Mudasir Mudasir Mustofa Mustofa Neolaka, Yantus A B Ni Putu Sri Ayuni Nindita Clourisa Amaris Susanto Nugraha, Gerry Nurillahi Febria Leswana Nurul Hidayat Aprilita Nurul Ismillayli Pratama J. Wibawa Rahayu Rahayu Rahayu Rahayu Rahayu Rahmat Basuki Rahmat Basuki Retno Ariadi Lusiana Rika Wulandari Rika Wulandari Rizal B., Muh Romelos Untailawan Sehol, Muhamad Setyawan, Teguh Soerja Koesnarpadi Sri Juari Santosa Sri Juari Santosa Sri Juari Santosa Suherman, Suherman Suyanta Suyanta Taek, Maximus M. Takashi Hayashita Tanjung, Revi Maylina Triana Kusumaningsih Tukan, Gerardus D. Uripto Trisno Santoso Widya Krestina, Luqman Hakim, Dyah Ayu Pramoda Wardani,