Garuda - Garba Rujukan Digital

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

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%.

Studi Pendahuluan Pengendapan Bertingkat pada Pemisahan Lantanum dari Logam Tanah Jarang Hidroksida Hasil Mineral Monasit Purba, Anita Zefanya M.; Bahti, Husein H.; Fauzia, Retna P.; Pratomo, Uji
Kimia Padjadjaran Vol 2, No 1 (2023)
Publisher : Kimia Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar

Logam tanah jarang memiliki sifat yang unik serta mempunyai peran penting untuk kemajuan teknologi dan industri. Karakteristik khusus dari logam ini menyebabkan belum ditemukannya bahan lain yang mampu menggantikan hingga saat ini. Pemisahan dan pemurnian logam tanah jarang dari campuranya tidak mudah, karena miripnya sifat fisiko-kimia yang dimiliki unsur-unsur tersebut. Monasit adalah senyawa fosfat yang mengandung logam tanah jarang dengan kadar oksida logam tanah jarang sekitar 50-70%. Dibutuhkan teknik pemisahan yang akurat dan efisien untuk memperoleh LTJ individu maupun campuran dalam bentuk yang murni dari monasit. Sejauh ini, proses pemisahan menggunakan metode pengendapan tetap menjadi pilihan utama dan dilakukan karena kemudahan, kecepatan, dan biaya yang rendah. Metode pengendapan merupakan suatu proses di mana zat-zat yang akan dipisahkan, seperti campuran ion-ion tanah jarang dalam larutan, diubah menjadi fase baru berupa padatan sebagai endapan. Lantanum adalah unsur tanah jarang golongan ringan memiliki nomor atom 57 memiliki sifat fisik berwarna putih keperakan, cukup lunak dan bersifat reaktif. Lantanum memiliki banyak manfaat terutama dalam industri elektronik, diaplikasikan dalam berbagai sektor seperti elektronika, magnetisme, metalurgi, fosfor, katalisis, pembuatan kaca dan teknologi keramik laser. Sehingga tujuan dari penelitian ini adalah melakukan pendekatan menentukan berapa persen kemurnian dan recovery dari logam lantanum yang dihasilkan pada pemisahan dengan metode pengendapan bertingkat optimum pada pH 8.5-10 Hasil pemisahan dianalisis menggunakan ICP-OES. Diperoleh persen kemurnian lantanum sebesar 88,60% dan persen recovery sebesar 92,92%.

Studi Pendahuluan Pemisahan Cerium dari Logam Tanah Jarang Hidroksida Hasil Olah Monasit dengan Metode Pengendapan Rahmanillah, Kharitas I.; Pratomo, Uji; Fauzia, Retna Putri; Bahti, Husein H.
Kimia Padjadjaran Vol 2, No 1 (2023)
Publisher : Kimia Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar

Keberadaan monasit yang mengandung logam tanah jarang (LTJ) cukup melimpah yang tersebar di Indonesia. Banyaknya monasit di Indonesia berpeluang dalam memproduksi LTJ sebagai bentuk kemandirian bangsa yang sampai saat ini masih memperoleh LTJ dari negara luar. Pada monasit terdapat cerium yang menyumbang sekitar 50-60% dari total kandungan unsur tanah jarang. Cerium memiliki berbagai manfaat sehingga cerium perlu dipisahkan dari campurannya. Pemisahan LTJ merupakan pemisahan yang cukup sulit, karena sifat kimia dan sifat fisika yang mirip. Upaya untuk pemisahan dan pemurnian cerium dilakukan melalui metode pengendapan. Tujuan dari penelitian ini adalah memperoleh unsur cerium dengan konsentrasi tinggi dan menentukan persen kemurnian cerium dengan metode pengendapan. Metode yang digunakan pada penelitian ini adalah metode pengendapan berdasarkan perbedaan nilai pH LTJ hidroksida dengan menggunakan amonium hidroksida sebagai agen pengendap. Pada tahap awal dilakukan pencarian pH dari unsur cerium dengan pengendapan bertingkat. Kemudian dilakukan dianalisis dengan ICP-OES. Unsur cerium diperoleh pada pH 0-4 dengan kadar tertinggi sebesar 32,78% dan kemurnian sebesar 90 %.

Artikel Review : Polimer Tercetak Ion untuk Pemisahan Logam Tanah Jarang (Sintesis dan Karakterisasi): Review Article: Ion Imprinted Polymers for Separation of Rare Earth Metals (Synthesis and Characterization) Putri, Syelena Prima; Pratomo, Uji; Fauziah, Retna Putri; Bahti, Husein Hernadi; Wyantuti, Santhy
Jurnal Sains dan Kesehatan Vol. 6 No. 5 (2024): J. Sains Kes.
Publisher : Fakultas Farmasi, Universitas Mulawarman, Samarinda, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25026/jsk.v6i5.2324

Rare earth metals (LTJ) are potential prospects that are widely applied in high technology such as cellphones, computer hard disks, solar cells, electric cars, musical instrument components, spacecraft manufacturing, defense industry. The use of REEs relies on their chemical, catalytic, electrical, magnetic and optical properties. In addition, the similar chemical and physical properties of rare earth metals make their separation very difficult and complicated, so appropriate and selective alternative separation methods are needed to obtain pure rare earth metals. One of the separation methods used is solid phase extraction using ion-imprinted polymer (IIP) adsorbents. IIP has the ability to adsorb with high selectivity because it stores the memory effect of the washed template ions. In this review article, an overview of various IIP syntheses for REE separation will be presented. It is hoped that this article can be a reference for research on IIP synthesis, especially for REEs. Keywords: Ion Imprinted Polymer, Rare Earth Metals (REEs), and IIP Synthesis Abstrak Logam tanah jarang (LTJ) merupakan prospek potensial yang banyak diaplikasikan pada teknologi tinggi seperti handphone, hard disk komputer, sel surya, mobil listrik, komponen perangkat alat musik, pembuatan pesawat luar angkasa industri pertahan. Penggunaan LTJ mengandalkan sifat kimia, katalitik, listrik, magnet, dan optiknya. Selain itu, sifat kimia dan fisika yang mirip pada logam tanah jarang membuat pemisahannya sangat sulit dan rumit, maka diperlukan metode pemisahan alternatif yang tepat serta selektif untuk mendapatkan logam tanah jarang yang murni. Salah satu metode pemisahan yang digunakan adalah ekstraksi fase padat menggunakan adsorben polimer tercetak ion (IIP). IIP memiliki kemampuan mengadsorpsi dengan selektivitas tinggi karena menyimpan memory effect dari ion template yang dicuci. Dalam artikel review ini, akan dipaparkan gambaran umum mengenai berbagai sintesis IIP untuk pemisahan LTJ. Artikel ini diharapkan dapat menjadi referensi untuk penelitian mengenai sintesis IIP terutama untuk LTJ. Kata Kunci: Polimer Tercetak Ion, Logam Tanah Jarang (LTJ) dan Sintesis IIP

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

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%.

Green Synthesis of Zinc Oxide Particles using Banana Peels and Tea Leaves Extracts for Rhodamine B Photodegradation Pratomo, Uji; Fransisca, Natasha; Afriani, Zahra; Sinambela, Ayu Jelita; Zahra, Nazwa Alya; Suwarno, Nelson Indarto; Sumeru, Husain Akbar; Kurnia, Irwan; Primadona, Indah; Edwin, Rudiawan
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.v10i2.41793

Rhodamine B is a widely used dye in the textile sector. However, the wastewater produced during the dyeing process presents a notable source of pollution, contaminating water and posing a threat to aquatic ecosystems due to its presence in liquid waste. Photocatalysis is a technique for breaking down toxic textile dye waste a semiconductor as a catalyst, valued for its high sensitivity and eco-friendly nature. In this research, zinc oxide particles were synthesized via a green synthesis approach using precipitation, employing natural capping agents from banana peel and tea leaf to degrade the synthetic dye of rhodamine B. The catalyst material was characterized using X-ray diffraction (XRD), scanning electron microscope (SEM), and ultraviolet-visible diffuse reflectance (UV-DRS). The photodegradation performance of rhodamine B was determined under UV light exposure for 3 hours. The XRD spectra of ZnO show the specific peaks of 2θ at 31.8°, 34.5°, and 36.3° with a crystallinity value of around 79.50%. The SEM result shows that the morphology of ZnO is in cotton-like form with a minimum band gap of 3.17 eV. The cotton-like ZnO particles demonstrated superior photodegradation efficiency for Rhodamine B, achieving 61.8%, compared to 47.9% with pure ZnO. It suggests that synthesizing ZnO particles with banana peels and tea leaf extracts boosts photodegradation efficiency by up to 20% compared to pure ZnO. This research highlights the potential of utilizing eco-friendly and sustainable methods as a greener approach for reducing waste in environmental applications.

Title

Found 26 Documents
Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title Search

Found 26 Documents Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title

Found 26 Documents
Search