eprintid: 58808
rev_number: 35
eprint_status: archive
userid: 26845
dir: disk0/00/05/88/08
datestamp: 2026-02-27 01:36:13
lastmod: 2026-02-27 01:36:13
status_changed: 2026-02-27 01:36:13
type: thesis
metadata_visibility: show
contact_email: putrisyafirahp@gmail.com
creators_name: Purnomo, Putri Syafira Halimatussyadiah
creators_id: 3334210021
contributors_type: http://www.loc.gov/loc.terms/relators/THS
contributors_type: http://www.loc.gov/loc.terms/relators/THS
contributors_name: Kambuna, Bening Nurul Hidayah
contributors_name: Ulfah, Ika Maria
contributors_id: 199008292020122013
contributors_id: 198704022009122001
corp_creators: UNIVERSITAS SULTAN AGENG TIIRTAYASA
corp_creators: FAKULTAS TEKNIK
corp_creators: JURUSAN TEKNIK METALURGI
title: Pengaruh Perbandingan Asam pada Ekstraksi Serium dari Logam Tanah Jarang Karbonat dengan Metode Pelindian Asam dan Presipitasi Selektif
ispublished: pub
subjects: TN
divisions: Metalurgi
full_text_status: restricted
keywords: Logam Tanah Jarang, Pelindian Asam, Fractional Precipitation
abstract: Serium (Ce) merupakan salah satu unsur logam tanah jarang (LTJ) yang banyak dimanfaatkan pada industri katalis, pemoles kaca, dan material keramik. Tantangan utama dalam pengolahannya adalah pemisahan serium dari unsur LTJ lain yang memiliki sifat kimia serupa. Penelitian ini bertujuan untuk menentukan kondisi optimum proses ekstraksi serium dari konsentrat LTJ karbonat melalui metode reverse leaching menggunakan asam nitrat (HNO3) dan asam asetat (CH3COOH), serta mengetahui pengaruh oksidasi dan fractional precipitation terhadap persen ekstraksi dan kemurnian serium. Proses pelindian asam dilakukan dengan variasi jenis asam, temperatur, rasio solid-liquid, konsentrasi asam, dan waktu, kemudian dianalisis menggunakan metode Taguchi. Residu hasil pelindian selanjutnya dioksidasi menggunakan H2O2 dan dipresipitasi menggunakan NH4OH pada pH 0–4. Karakterisasi pada penelitian ini dilakukan menggunakan FTIR, XRD, dan XRF untuk mengetahui perubahan fasa, valensi serium, serta tingkat kemurnian produk. Hasil penelitian menunjukkan bahwa kondisi terbaik pelindian diperoleh pada penggunaan HNO3 dengan temperatur 30°C, rasio S/L 1:6, konsentrasi 0,4 M, dan waktu 30 menit, yang menghasilkan % ektraksi Ce tertinggi sebesar 75,717%. Sementara itu, pada CH3COOH nilai ekstraksi tertinggi sebesar 60,311% dicapai pada temperatur 90°C, rasio S/L 1:6, konsentrasi 0,6 M, dan waktu 60 menit. Kondisi optimum berdasarkan analisis Taguchi menunjukkan hasil yang berbeda pada temperatur 60°C dengan waktu 60 menit untuk HNO3 dan 90°C untuk CH3COOH. Proses fractional precipitation menghasilkan kemurnian Ce tertinggi pada pH 4 tanpa penambahan oksidator, yaitu sebesar 62,809% untuk umpan HNO3 dan 53,008% untuk umpan CH3COOH. Secara keseluruhan, asam nitrat menunjukkan performa lebih baik dibandingkan asam asetat dalam menghasilkan persen ekstraksi dan kemurnian serium yang lebih tinggi, meskipun asam asetat berpotensi sebagai agen pelindi alternatif yang lebih ramah lingkungan.
date: 2026-02-27
date_type: published
pages: 189
institution: Fakultas Teknik Universitas Sultan Ageng Tirtayasa
department: Teknik Metalurgi
thesis_type: sarjana
thesis_name: sarjana
official_url: https://metalurgi.untirta.ac.id
related_url_url: https://brin.go.id
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funders: Badan Riset dan Inovasi Nasional
projects: Pembimbingan Mahasiswa Tugas Akhir (S1)
citation:   Purnomo, Putri Syafira Halimatussyadiah  (2026) Pengaruh Perbandingan Asam pada Ekstraksi Serium dari Logam Tanah Jarang Karbonat dengan Metode Pelindian Asam dan Presipitasi Selektif.  S1 thesis, Fakultas Teknik Universitas Sultan Ageng Tirtayasa.   
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