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All Journal PROSIDING SEMINAR KIMIA Jurnal Abdimas Mahakam
Ika Yekti Liana Sari
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Journal : PROSIDING SEMINAR KIMIA

 1 
PEMBUATAN ADSORBEN DARI AMPAS BIJI KOPI SEBAGAI ARANG AKTIF UNTUK PENYERAPAN ZAT WARNA RHODAMIN B Giffari Pijai Pradhana; Teguh Wirawan; Ika Yekti Liana Sari
PROSIDING SEMINAR KIMIA 2021: SEMINAR NASIONAL KIMIA 2021
Publisher : PROSIDING SEMINAR KIMIA

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Abstract

Penelitian mengenai pembuatan adsorben dari ampas biji kopi sebagai arang aktif untuk penyerapan zat warna Rhodamin B telah dilakukan. Ampas biji kopi diaktivasi secara fisika terlebih dahulu melalui pemanasan kemudian dilakukan aktivasi secara kimia dengan menggunakan aktivator H3PO4 dan H2SO4. Penentuan uji kualitas arang aktif meliputi penentuan kadar air, kadar abu, kadar zat terbang (Volatile Matter), daya serap iodium dan daya serap metilen biru pada adsorben ampas biji kopi dilakukan dengan menggunakan alat tanur. Hasil uji kualitas arang aktif ampas biji kopi meliputi kadar air (9,09%; 3,32% dan 3,84%), kadar abu (5,21%; 2,32% dan 3,08%), kadar Volatile matter (34,72%; 34,44% dan 41,63%), daya serap iodum (362,80 mg/g; 362,44 mg/g dan 247,97 mg/g) dan daya serap metilen biru (1,45 mg/g; 0,79 mg/g dan 0,82 mg/g). Hasil penentuan waktu kontak optimum, yaitu 45 menit. Pada penentuan massa optimum, yaitu 0,2 gram. Pada penentuan pH optimum, yaitu pH 7 dan pada penentuan kapasitas adsorpsi maksimum, yaitu 4,43 mg/g; 0,46 mg/g dan 0,58 mg/g. Kata Kunci: Arang Aktif, Adsorpsi, Rhodamin B, Ampas Kopi.
STUDI PERBANDINGAN ADSORPSI ION LOGAM Cd2+ PADA AF, Fe3O4 DAN Fe3O4-AF Ririn Dwi Mardianto; Soerja Koesnarpadi; Ika Yekti Liana Sari
PROSIDING SEMINAR KIMIA Vol 1 No 1 (2022): Prosiding SNK 2022
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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Research on comparative study of metal ion adsorption on AF, and -AF has been carried out. The initial stage is the extraction of AF from the peat soil of the Samboja area of ​​East Kalimantan. Extraction was carried out with 1 M NaOH and 12 M HCl solution. The second stage was the preparation of dan -AF by coprecipitation method. The next step is the comparison test of AF adsorption, and -AF against metal ions. The results showed that -AF had 4 times greater adsorption ability than and AF in adsorption of metal ions that is equal to 8.4563 mg/g. This is because AF has a high affinity for particles and is able to increase the stability of Nano dispersion of by preventing their aggregation so that -AF is more dispersed and more stable. -AF also has a smaller size compared to AF and Fe3O4. Keywords: Adsorption, AF, Fe3O4, Fe3O4-AF, Cd2+
ADSORPSI METHYLENE BLUE MENGGUNAKAN ADSORBEN ASAM FULVAT (AF) DARI TANAH GAMBUT SAMBOJA KALIMANTAN TIMUR Fransiska Febriani; Soerja Koesnarpadi; Ika Yekti Liana Sari
PROSIDING SEMINAR KIMIA Vol 1 No 1 (2022): Prosiding SNK 2022
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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Research on the adsorption of methylene blue with fulvic acid (AF) adsorbent from peat soil has been carried out. The initial stage is the extraction of AF from the peat soil of the Samboja area of East Kalimantan. Extraction was carried out with a solution of 1 M NaOH and 12 M HCl(p). The results obtained a yellow-brown solid fulvic acid. The optimization of methylene blue adsorption by AF was obtained, namely a contact time of 120 minutes at pH 3 and an optimum concentration of 40 mg/L and an adsorption capacity of 0.98 mg/g. Keywords: Adsorption, fulvic acid, methylene blue
OPTIMASI pH DAN WAKTU KONTAK OPTIMUM ADSORBEN Fe3O4-AH TERHADAP ION LOGAM Pb2+ Sindi Dwi Riyana; Soerja Koesnarpadi; Ika Yekti Liana Sari
PROSIDING SEMINAR KIMIA Vol 1 No 1 (2022): Prosiding SNK 2022
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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Optimization of pH and optimum contact time of coated magnetite adsorbent (Fe3O4-AH) against metal ions Pb2+ has been carried out. Humic acid-coated magnetite adsorbent (Fe3O4-AH) was prepared using the coprecipitation method with a mass ratio of 1:2 (w/w) and the separation process using an external magnet. Optimization was carried out by batch method using a Pb solution with a concentration of 50 mg/L and an adsorbent mass of 0.1 gram Fe3O4-AH. The test results show that the optimum pH is at pH 5 with % adsorption of 97.70% and the optimum contact time is at 20 minutes with % adsorption of 99.89%. Keywords: humic acid, magnetite, adsorption
Co-Authors Djihan Ryn Pratiwi Erwin Erwin Eva Marliana, Eva Fransiska Febriani Giffari Pijai Pradhana irfa Ashari Hyahara Noor Hindryawati Ririn Dwi Mardianto Sindi Dwi Riyana Soerja Koesnarpadi Teguh Wirawan