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All Journal VALENSI CHEMPUBLISH JOURNAL JC-T (Journal Cis-Trans): Jurnal Kimia dan Terapannya Chimica et Natura Acta PENDIPA Journal of Science Education CHEDS: Journal of Chemistry, Education, and Science al Kimiya : Jurnal Ilmu Kimia dan Terapan
Anni Anggraeni, Anni
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Education Environmental Science Materials Science & Nanotechnology Mathematics

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Comparative Study of Voltammetric Analysis with UV-Vis Spectrophotometry in Determining the Results of Liquid-Liquid Extraction of Samarium (III) Wyantuti, Santhy; Nurwulanda, Salsha; Mardiah, Najmah; Anggraeni, Anni; Pratomo, Uji; Fauzia, Retna Putri; Bahti, Husein H.
Jurnal Kimia Valensi Jurnal Kimia VALENSI, Volume 10, No. 2, November 2024
Publisher : Syarif Hidayatullah State Islamic University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/jkv.v10i2.38941

Abstract

Rare earth elements (REEs) are garnering significant attention in diverse fields due to their important and fascinating properties. Among these REEs, samarium (Sm) has numerous advantages and benefits. Before using Sm, it must be separated from its natural sources due to the formation of complex compounds with other elements. To achieve this, liquid-liquid extraction emerges as one of the REE separation methods, presenting several advantages, including a streamlined process. Various methods can be used to analyze extraction results, such as ICP-MS and XRF. In comparison, UV-Vis spectrophotometry has significant advantages compared to other methods, it provides a simple approach to determining the level of a substance, and the results given are quite accurate, while differential pulse voltammetry (DPV) is one of the electrochemical analysis methods that is expected to provide faster and accurate analysis results. This study aims to determine the value of analytical parameters, Kd of Sm(III) liquid-liquid extraction results using DPV analysis and UV-Vis spectrophotometry methods. The DPV method yielded LoD 1.24 mg/L,  accuracy 98.39%, and %recovery 106.69%. The extraction data obtained Kd Sm values ranging from 6.0019-7.3860. The UV-Vis spectrophotometry results provided an individual extraction efficiency of Sm(III) of 88.54%. This method obtained LoD 0.71 mg/L, accuracy 96.00%, and %recovery 104.00%.
SELEKTIVITAS LIGAN DI-2-ETILHEKSIL FOSFAT (D2EHPA) UNTUK EKSTRAKSI LOGAM TANAH JARANG DENGAN SIMULASI DINAMIKA MOLEKULER Dewi, Ratna Sari; Nst, Hafni Indriati; Syafei, Minda Syafina; Sembiring, Surya Julius; Br Ginting, Ela Riana; Karmina, Putri; Mutholib, Abdul; Anggraeni, Anni; Bahti, Husein H; Yusuf, Muhammad; Janitra, R S; Hardianto, Ari
CHEDS: Journal of Chemistry, Education, and Science Vol 8, No 2 (2024)
Publisher : Universitas Islam Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30743/cheds.v8i2.10177

Abstract

Logam Tanah Langka (REE) berguna dalam berbagai aplikasi teknologi tinggi. Kebutuhan akan LTJ semakin meningkat seiring berjalannya waktu. Memisahkan dan memurnikan REE sulit dilakukan karena REE memiliki sifat yang mirip satu sama lain. Oleh karena itu, perlu dikembangkan metode untuk memisahkan dan memurnikan REE dari mineralnya. Salah satu metode pemisahannya menggunakan ligan Di-(2-etilheksil)asam fosfat (D2EHPA) yang memiliki banyak keunggulan sebagai ekstraktan dalam ekstraksi. Tujuan dari penelitian ini adalah untuk mengetahui ligan yang memiliki selektivitas tertinggi untuk pemisahan REE menggunakan dinamika molekuler dan untuk mengetahui ligan mana yang dapat terdistribusi lebih baik ke dalam fasa organik. Metodologinya dilakukan dengan menggunakan pemodelan molekuler BIOVIA Discovery Studio 2016 dan optimalisasi energi menggunakan program AMBER18. Studi komputasi dapat dilakukan untuk menemukan titik awal sintesis di laboratorium. Kompleks REE dengan ligan D2EHPA dan tiga perairan dapat digunakan dalam pemisahan REE karena lebih efisien dan stabilitas kompleks lebih besar.Rare Earth Metals (REEs) are useful in a variety of high-tech applications. The need for LTJ is increasing over time. Separating and purifying REEs is difficult because REEs have similar properties to one another. So it is necessary to develop methods for separating and purifying REEs from their minerals. One of the separation methods uses the ligand Di-(2-ethylhexyl)phosphoric acid (D2EHPA) which has many advantages as an extractant in extraction. The aim of this research is to find out the ligand with the highest selectivity for REE separation using molecular dynamics and to find out which ligand can be better distributed into the organic phase. The methodology was carried out using BIOVIA Discovery Studio 2016 molecular modeling and energy optimization using the AMBER18 program. Computational studies can be performed to find starting points for synthesis in the laboratory. The REE complex with the D2EHPA ligand and three waters can be used in REE separation because it is more efficient and the stability of the complex is greater.
Comparative Study of Voltammetric Analysis with UV-Vis Spectrophotometry in Determining the Results of Liquid-Liquid Extraction of Samarium (III) Wyantuti, Santhy; Nurwulanda, Salsha; Mardiah, Najmah; Anggraeni, Anni; Pratomo, Uji; Fauzia, Retna Putri; Bahti, Husein H.
Jurnal Kimia Valensi Jurnal Kimia VALENSI, Volume 10, No. 2, November 2024
Publisher : Department of Chemistry, Faculty of Science and Technology Syarif Hidayatullah Jakarta State Islamic University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/jkv.v10i2.38941

Abstract

Rare earth elements (REEs) are garnering significant attention in diverse fields due to their important and fascinating properties. Among these REEs, samarium (Sm) has numerous advantages and benefits. Before using Sm, it must be separated from its natural sources due to the formation of complex compounds with other elements. To achieve this, liquid-liquid extraction emerges as one of the REE separation methods, presenting several advantages, including a streamlined process. Various methods can be used to analyze extraction results, such as ICP-MS and XRF. In comparison, UV-Vis spectrophotometry has significant advantages compared to other methods, it provides a simple approach to determining the level of a substance, and the results given are quite accurate, while differential pulse voltammetry (DPV) is one of the electrochemical analysis methods that is expected to provide faster and accurate analysis results. This study aims to determine the value of analytical parameters, Kd of Sm(III) liquid-liquid extraction results using DPV analysis and UV-Vis spectrophotometry methods. The DPV method yielded LoD 1.24 mg/L,  accuracy 98.39%, and %recovery 106.69%. The extraction data obtained Kd Sm values ranging from 6.0019-7.3860. The UV-Vis spectrophotometry results provided an individual extraction efficiency of Sm(III) of 88.54%. This method obtained LoD 0.71 mg/L, accuracy 96.00%, and %recovery 104.00%.
Understanding The Role of Diffusion in The Separation of Rare Earth Elements in Water-n-hexane Systems: A Molecular Dynamics Simulation Study Hardianto, Ari; Janitra, Regaputra Satria; Fauzi, Muhammad Ryan; Juliandri, Juliandri; Anggraeni, Anni; Soedjanaatmadja, Ukun Mochammad Syukur
al Kimiya: Jurnal Ilmu Kimia dan Terapan Vol. 10 No. 2 (2023): al Kimiya: Jurnal Ilmu Kimia dan Terapan
Publisher : Department of Chemistry, Faculty of Science and Technology, UIN Sunan Gunung Djati Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/ak.v10i2.30680

Abstract

Liquid-liquid extraction is one of the methods for separating rare earth elements (REE) in the presence of an extractant. The separation of REE ions, complex with an extractant, involves interfacial migrations that are influenced by the diffusion of the respective ions. Therefore, we performed molecular dynamics simulations on REE ions (La3+, Sm3+, Eu3+, Gd3+, and Tb3+) in a water-n-hexane system to determine if each ion exhibited a distinct diffusion coefficient. By employing molecular dynamics simulations, we calculated diffusion coefficients for these ions based on the Einstein relation. The diffusion coefficients for La3+, Sm3+, Eu3+, Gd3+, and Tb3+ were found to be 4.21×10–6, and 3.96×10–6, 4.57×10–6, 4.17×10–6, and 5.19×10–6 cm2/s, respectively. However, statistical analysis via the Kruskal-Wallis test revealed no significant variance in the diffusion coefficients (p-value greater than 0.05), indicating that diffusion is not a rate-limiting factor in REE separation. The findings suggest that effective mixing during extraction can eliminate the role of diffusion as a differentiating factor in REE separation. Overall, this study offers critical insights into optimizing REE extraction processes
Co-Authors A. Mutalib Abdul Mutalib Abdul Mutholib Achmad Zainudin, Achmad Ari Hardianto Atiek Rostika Noviyanti Br Ginting, Ela Riana Darwati Darwati Fajriyah, Maulida Fauzi, Muhammad Ryan Hendrati, Diana Husein Hernadi Bahti Janitra, R S Janitra, Regaputra Satria Juliandri Juliandri Karmina, Putri Lubis, Rubianto A. M. Lutfi Firdaus, M. Lutfi Mardhotillah, Yulia Mardiah, Najmah Muhammad Yusuf Nst, Hafni Indriati Nurlina, Nunik Nurwulanda, Salsha Pratomo, Uji Primadhini, Primadhini R. Ukun M.S. Soedjanaatmadja Ratna Sari Dewi Retna Putri Fauzia Rustaman Rustaman Santhy Wyantuti Sembiring, Surya Julius Shabarni Gaffar -, Shabarni Gaffar Sodjanaatmadja, Ukun M. S. Sofyatin, Titin Sri Adi Sumiwi Syafei, Minda Syafina TATI NURHAYATI Yenni Wahyuni Hartati, Yenni Wahyuni