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All Journal SAINSMAT SAINSMAT: Jurnal Ilmiah Ilmu Pengetahuan Alam
Muftihatu Rahma
Universitas Negeri Makassar
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Studi Adsorpsi Logam Fe (III) Menggunakan Koposit Kitin Silika Sekam Padi Muftihatu Rahma; Hasri Hasri; Diana Eka Pratiwi
Sainsmat : Jurnal Ilmiah Ilmu Pengetahuan Alam Vol 12, No 2 (2023): September
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Negeri Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35580/sainsmat122439262023

Abstract

Penelitian ini bertujuan untuk mengetahui pH optimum dan kapasitas adsorpsi logam Fe(III) menggunakan komposit Kitin-silika sekam padi. Metode yang digunakan meliputi pembuatan natrium silikat, pembuatan komposit kitin-silika, penentuan pH optimum dan kapasitas adsorpsi terhadap logam Fe(III). Pembuatan natrium silikat dilakukan dengan pelarutan menggunakan NaOH. Komposit kitin-silika sekam padi dibuat dengan mereaksikan larutan natrium silikat dengan kitin. Karakterisasi komposit kitin-silika meliputi analisis gugus fungsi menggunakan FTIR dan analisis morfologi menggunakan SEM. Proses adsorpsi dilakukan dengan variasi pH (2-6), variasi konsentrasi (50-150 ppm). Hasil penelitian menunjukkan bahwa pH optimum pada adsorpsi logam Fe(III) adalah 4 dengan daya adsorpsi sebesar 91,42%. Kapasitas adsorpsi logam Fe(III) dengan konsentrasi 50, 80, 100 dan 150 ppm berturut-turut adalah 31,49 mg/g; 69,69mg/g; 89,83 mg/g dan 138,57 mg/g. Adsorpsi logam Fe(III) lebih sesuai untuk model isotherm Langmuir dibandingkan dengan Freundlich dengan nilai R2 = 0,9414.Kata kunci : sekam padi, adsorpsi, kitin-silika, isotherm dan logam berat
Studi Adsorpsi Logam Fe (III) Menggunakan Komposit Kitin Silika Sekam Padi Muftihatu Rahma; Hasri; Diana Eka Pratiwi
Sainsmat : Jurnal Ilmiah Ilmu Pengetahuan Alam Vol. 12 No. 2 (2023): Volume 12 Nomor 2 (September 2023)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Negeri Makassar

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

Abstract

This study aims to determine the optimum pH and adsorption capacity of Fe(III) metal adsorption using chitin- silica composite rice husk. The research phase includes the manufacture of sodium silicate, manufacture of chitin- silica composites, determination of optimum pH and adsorption capacity of Fe(III) metals. Preparation of sodium silicate is done by dissolving using NaOH. Chitinsilica rice husk composites were prepared by reacting sodium silicate solution with chitin. The characterization of chitin-silica composites included functional group analysis using FTIR and morphological analysis using SEM. The adsorption process was carried out with variations in pH (2-6), variations in concentration (50-150 ppm). The results showed that the optimum pH for the adsorption of Fe(III) metals was 4 with the adsorption power 91,42%. The adsorption capacity of Fe(III) metal with concentrations of 50, 80, 100 and 150 ppm were 31.49 mg/g, respectively; 69.69mg/g; 89.83 mg/g and 138.57 mg/g. The adsorption of Fe(III) metal is more suitable for the Langmuir isotherm model compared to Freundlich with a value of R2 = 0.9414.
SINTESIS KOMPOSIT KITIN-SILIKA (KI-SIL) DAN APLIKASINYA SEBAGAI ADSORBEN LOGAM Fe (III) DAN Cr (III) Hasri Hasri; Diana Eka Pratiwi; Muftihatu Rahma; Satria Putra Jaya Negara; Marlina Ummas Genisa; Haryanti Putri Rizal
Sainsmat : Jurnal Ilmiah Ilmu Pengetahuan Alam Vol. 14 No. 01 (2025): Volume 14 Nomor 1 (Maret 2025)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Negeri Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35580/45m24r41

Abstract

Rice husk waste can be utilized as a source of silica with a silica content of 86.90-97.30 %, which has potential as a silica-based material. Similarly, chitin sources are abundant in crustacean shells (crabs, shrimps, lobsters etc.), the combination of chitin-silica (Ki-Sil) as a composite is very interesting to study. So this research aims to synthesize Ki-Sil composite and its application as adsorbent of Fe(III) and Cr(III) metal ions. At first, the extraction of rice husk silica was carried out and then the synthesis of Ki-Sil composites. The obtained composite was optimized for pH with pH variation (2-6), adsorption capacity with concentration variation (50-150 ppm) and adsorption selectivity test of both metal ions with ratio (0.25:0.75; 0.75:0.25 and 1:1). Analysis of Ki-Sil functional groups using FTIR shows that the synthesis has been successful with wave numbers that match the standard and morphological analysis using SEM which shows the composite material is a porous material. The results obtained optimum pH 4 for adsorption of both target metals. The adsorption capacity of Fe(III) metal was 31.49 mg/g; 69.69mg/g; 89.83 mg/g and 138.57 mg/g, respectively. And the adsorption capacities of Cr(III) metal were 37.80 mg/g; 70.86 mg/g; 89.98 mg/g and 138.84 mg/g, respectively. The selectivity test results showed that Ki-Sil adsorbed Fe(III) metal by 0.9820 mmol and Cr(III) metal by 0.9949 mmol. It is concluded that the Ki-Sil composite is more selective in adsorbing Cr(III) metal.
Co-Authors Diana Eka Pratiwi Haryanti Putri Rizal Hasri Hasri Hasri Marlina Ummas Genisa Satria Putra Jaya Negara