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All Journal Urania Jurnal Ilmiah Daur Bahan Bakar Nuklir EduChemia: Jurnal Kimia dan Pendidikan Unesa Journal of Chemistry
Wijayanto, Herry
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Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Education Energy Materials Science & Nanotechnology

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EFEKTIVITAS DESORPSI CESIUM OLEH SURFAKTAN KATIONIK BERDASARKAN STRUKTUR HIDROFILIKNYA PADA MONTMORILLONIT K10 Wijayanto, Herry; Nakashima, Satoru
Urania : Jurnal Ilmiah Daur Bahan Bakar Nuklir Vol 29, No 1 (2023): APRIL, 2023
Publisher : website

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17146/urania.2023.29.1.6962

Abstract

Penelitian ini membahas efisiensi desorpsi cesium (Cs) dari sampel montmorillonit K10 (MMTK10) yang telah dikontaminasi oleh Cs sebelumnya (MMTK10/Cs) menggunakan desorben surfaktan kationik benzyldodecyldimethylammonium bromida (BDAB) dan dodecyltrimethylammonium bromida (DTAB), serta HCl sebagai kontrol desorben. Hasil menunjukkan bahwa surfaktan kationik, terutama pada konsentrasi tinggi 20-50 mM, memiliki efisiensi desorpsi yang lebih tinggi dibandingkan HCl, dengan efisiensi mencapai 80-90%. Mekanisme ini dikaitkan dengan kemampuan surfaktan kationik untuk membentuk misel ketika konsentrasinya melebihi nilai konsentrasi kritis misel (KKM) atau pada konsentrasi tinggi, yang memfasilitasi pertukaran ion dengan Cs pada permukaan MMTK10/Cs. Namun, tidak ada perbedaan signifikan dalam efisiensi desorpsi Cs antara BDAB dan DTAB, meskipun struktur hidrofilik BDAB lebih besar. Hal ini berbeda dengan penelitian sebelumnya pada montmorillonit lainnya dimana semakin besar struktur hidrofilik surfaktan yang digunakan, semakin besar interlayer montmorillonit terbuka akibat masuknya surfaktan besar itu pada interlayer sehingga mendorong desorpsi Cs dengan jumlah yang lebih besar. Akan tetapi pada penelitian ini tidak adanya perbedaan efisiensi desorpsi Cs dari kedua surfaktan lebih disebabkan karena struktur clay MMTK10 itu sendiri yang tidak memiliki kemampuan pengembangan atau pembesaran interlayer, akibat perlakuan suhu saat produksinya sebelum dijual kepasaran. Selain itu, kesamaan panjang rantai ekor hidrofobik antara BDAB dan DTAB berkontribusi pada kesamaan hasil desorpsi Cs dari kedua surfaktan tersebut. Kesimpulannya, sifat dan struktur surfaktan kationik mempengaruhi proses desorpsi Cs, tetapi karakteristik spesifik dari montmorillonit atau clay yang digunakan juga berperan penting dalam mekanisme desorpsi ini.Kata kunci: Desorpsi Cs, surfaktan kationik, interlayer montmorillonit.
ANALISIS PENAMBAHAN ETANOL PADA PEMBENTUKKAN MISEL DARI SURFAKTAN KATIONIK DAN IMPLIKASINYA TERHADAP DESORPSI CESIUM DARI KAOLINIT Wijayanto, Herry
Unesa Journal of Chemistry Vol. 12 No. 3 (2023): Vol 12 No 3 (2023)
Publisher : Department of Chemistry, Faculty of Mathematics and Natural Sciences, Surabaya State University, located at Jl Ketintang, Surabaya, East Java, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/ujc.v12n3.p83-88

Abstract

This research investigates the impact of adding ethanol to the preparation of cationic surfactant tetradecyltrimethylammonium bromide (TDAB) solutions on the formation of micelles and the efficiency of cesium ions (Cs) desorption from kaolinite surface. The results of the study demonstrate that an increase in TDAB concentration enhances Cs desorption efficiency, reaching a maximum desorption of approximately 84%, attributed to the significant positive charge of the formed micelles. However, the addition of ethanol results in smaller micelles with lower positive charges, consequently reducing the efficiency of Cs ion desorption. Furthermore, the addition of ethanol also raises the critical micelle concentration (CMC), indicating the potential for micelle formation at higher concentrations. The findings of this study offer crucial insights into understanding the complex interactions among surfactants, ethanol, and mineral surfaces, and their relevance in mineral ion recovery applications.
Smart-Coating Corrosion Inhibitor for Carbon Steel Using LDH Modified with Laundry Detergent Waste Irmayanti, Dwi; Jamilah, Badrotul; Agustin, Ardianti Dwi; Fitria, Maulida Rizki; Wijayanto, Herry
EduChemia: Jurnal Kimia dan Pendidikan Vol 10, No 1 (2025)
Publisher : Department of Chemistr Education Faculty of Teacher Training and Education Universitas Su

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/educhemia.v10i1.29560

Abstract

This research was conducted with the aim of reducing environmentally harmful detergent waste while utilizing its anionic surfactant content for the development of Zn-Al LDH composites with benzimidazole as a smart corrosion inhibitor for low-carbon steel, providing dual protection. The samples used in this research included detergent waste collected from commercial laundry services in the Ketintang area of Surabaya, commercial detergent, dodecylbenzenesulfonate, and pure Zn-Al LDH. The methodology involves the synthesis of Zn-Al LDH followed by characterization using FTIR, XRD, and TGA. The results indicate that the thermal decomposition profiles of Zn-Al LDH intercalated with commercial detergent, detergent waste, and dodecylbenzenesulfonate confirm that Zn-Al LDH can be modified with laundry waste. Additionally, interactions between Zn-Al LDH and benzimidazole enhance the crystalline structure of Zn-Al LDH, improving its quality as an anticorrosion material. Quantitative corrosion rate analysis using the weight loss method revealed that the Zn-Al LDH–dodecylbenzenesulfonate–benzimidazole sample exhibited the highest corrosion resistance, followed by the Zn-Al LDH–commercial detergent–benzimidazole, Zn-Al LDH–pure–benzimidazole, and Zn-Al LDH–detergent waste–benzimidazole samples. Overall, these findings support the feasibility of repurposing detergent waste as a functional additive for Zn-Al LDH-based corrosion inhibitors. Although not as effective as pure commercial surfactants, detergent waste provides environmental and functional benefits, reducing environmentally harmful and sustainable smart coatings for corrosion protection.
Co-Authors Agustin, Ardianti Dwi Fitria, Maulida Rizki Irmayanti, Dwi Jamilah, Badrotul Nakashima, Satoru