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All Journal JURNAL KIMIA SAINS DAN APLIKASI ALCHEMY Jurnal Penelitian Kimia SEMAR
Dina Fitriana
Chemistry Department, Faculty Of Mathematics And Natural Sciences, Universitas Sebelas Maret, Jl. Ir. Sutami 36A, Kentingan, Surakarta, 57126|Universitas Sebelas Maret|Indonesia
Humanities Chemical Engineering, Chemistry & Bioengineering Chemistry Education Energy Engineering Environmental Science Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Social Sciences

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Removal of Heavy Metals: Pb(II), Ni(II) And Cd(II) By Fe3O4@SiO2-TMPDT Adsorbent Prepared From Rice Husk Ash Sri Hastuti; Tri Martini; Atmanto Heru Wibowo; Dina Fitriana; Wihda Zuhara; Hesti Mutma'inah; Rima Indriyana Putri
ALCHEMY Jurnal Penelitian Kimia Vol 21, No 1 (2025): March
Publisher : UNIVERSITAS SEBELAS MARET (UNS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/alchemy.21.1.91934.53-63

Abstract

The adsorption of Pb(II), Ni(II), and Cd(II) metal ions onto Fe3O4@SiO2-TMPDT adsorbent was carried out through batch experiments. In this study, Fe3O4@SiO2-TMPDT adsorbent was synthesized through a sol-gel process using sodium silicate extracted from rice husk ash (Na2SiO3)RHA with the addition of magnetite (Fe3O4) and modifier N1-(3-trimethoxysilylpropyl) diethylenetriamine (TMPDT). The synthesized adsorbent was then characterized by FTIR. The Fe3O4@SiO2-TMPDT adsorbent was prepared with suspension Fe3O4:(Na2SiO3)RHA ratios (v/v) of 1:4, 2:3, and 1:1, and varying the amounts of TMPDT of 1; 2.5 and 5 mL. The optimum pH to perform conditions adsorption for Pb(II) metal ions was determined to be 4, while Ni(II) and Cd(II) were 5. In addition, the adsorption process followed a pseudo-second-order kinetic model, and the adsorption isotherm was consistent with the Langmuir isotherm. The adsorption capacities for Pb(II), Ni(II), and Cd(II) were 11.760 mg/g, 1.864 mg/g, and 1.888 mg/g, respectively.
The Modification of Coal Fly Ash Adsorbent Using Dithizone Immobilization for Cd(II) Ions Removal Dina Fitriana; Mudasir Mudasir; Dwi Siswanta
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.
Chitosan-Impregnated Activated Carbon Derived from Sugarcane Bagasse for Alizarin Red S Adsorption Dina Fitriana; Sri Hastuti; Abu Masykur; Atmanto Heru Wibowo; Puput Nursetyani; Miftahul Rohmah; Faiza Dzikra Az-Zahra
Jurnal Kimia Sains dan Aplikasi Vol 28, No 9 (2025): Volume 28 Issue 9 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.28.9.488-501

Abstract

In the present study, a chitosan-impregnated activated carbon derived from sugarcane bagasse (Cs-Act SB) has been synthesized for the removal of Alizarin Red S (ARS) dye from an aqueous solution. The dried sugarcane bagasse sample was rinsed with 0.5% HCl to eliminate impurities and subsequently dried overnight at 110°C. Thereafter, it was subjected to carbonization in a furnace at 600°C for 2 h to produce sugarcane bagasse biochar (SB). The SB was then chemically activated using NaOH and physically activated in a muffle furnace at 750°C for 2 h to produce activated carbon (Act-SB). The obtained Act-SB was then modified using chitosan to yield Cs-Act SB biocomposite. The Act-SB and Cs-Act SB were characterized based on moisture content and ash content, pH points of zero charge (pHPZC), FT-IR, SEM-EDX, and TGA-DTA analysis. The Cs-Act SB has a moisture content of 4.0% and an ash content of 3.40%, respectively. The results show that the adsorbent process is desirable at low pH under acidic conditions (pH 2) with a pHPZC of 4.58. Based on the FT-IR spectra, the characteristic peaks of the chitosan were shown for Cs-Act SB at 3440 cm−1 due to the stretching vibration of the hydroxyl and amino functional group. The surface of Cs-Act SB has an irregular and heterogeneous surface and has high carbon content (84.42%). The TGA-DTA results showed the stability of Cs-Act SB with respect to temperature. Moreover, the adsorption kinetics were found to follow a pseudo-second-order kinetic model, and the adsorption isotherms are best described by the Langmuir model for both Act-SB and Cs-Act SB. The determined Langmuir maximum adsorption capacity of Cs-Act SB and Act-SB for the ARS dye adsorption were 78.13 mg g−1 and 30.03 mg g−1, respectively. Kinetics and adsorption isotherm studies suggest that the capacity, equilibrium constant, and energy of the Cs-Act SB in adsorbing ARS dye are improved compared to Act-SB.
Pemberdayaan Masyarakat melalui Pembuatan Detergen Cair Alami Berbasis Buah Lerak untuk Mengurangi Penggunaan Bahan Kimia Berbahaya Abu Masykur; Dina Fitriana; Sri Hastuti; Atmanto Heru Wibowo; Candra Purnawan; Denna Artika Cinta; Khairunnisa Nabilla
SEMAR (Jurnal Ilmu Pengetahuan, Teknologi, dan Seni bagi Masyarakat) Vol 14, No 2 (2025): November
Publisher : LPPM UNS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/semar.v14i2.109413

Abstract

Aktivasi peran masyarakat dalam menjaga lingkungan perairan penting dilakukan untuk menumbuhkan kesadaran masyarakat. Salah satu caranya adalah melalui edukasi tentang pentingnya menggunakan bahan rumah tangga yang ramah lingkungan. Kegiatan pengabdian dilakukan dengan melakukan sosialisasi kepada kelompok PKK di Perumahan Pondok Baru Permai IV, Kelurahan Ngesrep, Kecamatan Ngemplak, Kabupaten Boyolali mengenai dampak penggunaan detergen kimia yang berlebihan terhadap lingkungan. Pada sosialisasi ini, dikenalkan detergen ramah lingkungan yang berbahan dasar buah lerak yang kemudian diikuti dengan demonstrasi dan pelatihan. Keberhasilan kegiatan diukur dengan menganalisis hasil pretest dan posttest. Hasil menunjukkan adanya peningkatan pemahaman yang ditunjukkan oleh hasil posttest yang meliputi (1) anggota kelompok PKK telah mengetahui kandungan dalam detergen dan isu pencemaran lingkungan karena detergen komersial yang dievaluasi melalui peningkatan nilai rata-rata yang semula 87 pada pretest menjadi 99 pada postest. (2) Anggota kelompok PKK memahami cara membuat detergen cair berbasis lerak. Dengan demikian, kegiatan pengabdian ini memberikan implikasi mampu meningkatkan pengetahuan anggota kelompok PKK mengenai dampak penggunaan detergen konvensional, bahan alam yang potensial untuk digunakan sebagai bahan dasar detergen alami ramah lingkungan, dan keterampilan dalam membuat detergen cair dari bahan alam.
Co-Authors Abu Masykur Abu Masykur Ashadi, Ashadi Atmanto Heru Wibowo Atmanto Heru Wibowo Candra Purnawan Denna Artika Cinta Dwi Siswanta Faiza Dzikra Az-Zahra Hesti Mutma'inah Khairunnisa Nabilla Miftahul Rohmah Mudasir Mudasir Puput Nursetyani Rima Indriyana Putri Saputro, Agung Nugroho Catur Sri Hastuti Sri Hastuti Sri Hastuti Tri Martini Wihda Zuhara