Adsorpsi Cu(II) Menggunakan Silika Gel Dari Limbah Botol Kaca Bahan Kimia: Optimasi Menggunakan Response Surface Methodology Box-Behnken Design

Pertiwi, Anggun Cahyaning (2022) Adsorpsi Cu(II) Menggunakan Silika Gel Dari Limbah Botol Kaca Bahan Kimia: Optimasi Menggunakan Response Surface Methodology Box-Behnken Design. Masters thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Penelitian ini bertujuan untuk menerapkan response surface methodology box-behnken design dalam menentukan kondisi optimum ekstraksi silika dan adsorpsi logam Cu2+menggunakan silika gel hasil sintesis. Faktor yang dioptimasi dalam ekstraksi silika yaitu variasi rasio silika dalam limbah botol kaca:NaOH 1:3, 1:4, dan 1:5, ukuran partikel serbuk limbah botol kaca 75-62, 62-53, dan 53-44 mikrometer, dan suhu 400, 600, dan 800°C. Hasil analisis menunjukkan bahwa kondisi optimum ekstraksi dan sintesis silika gel mendekati daerah rasio silika dalam limbah botol kaca:NaOH 1:3, ukuran partikel serbuk limbah kaca 75- 62 mikrometer, dan suhu 800°C. Silika gel sintesis memiliki pola diffartogram yang amorf pada 2θ 20-30°, kemurnian 75,63%, luas permukaan 297,08 m2 /g, dan jari-jari pori 15,74 nm. Berdasarkan data tersebut, silika gel hasil sintesis berpotensi menjadi adsorben logam berat, dalam hal ini adalah Cu2+ . Penentuan kondisi optimum adsorpsi Cu2+ menggunakan variasi massa adsorben 2,50; 3,00; dan 3,50 gram, konsentrasi awal 50; 75; dan 100 ppm, waktu kontak 10; 15; dan 20 menit, serta pH 4, 7, dan 10. Kondisi optimum adsorpsi diperoleh dengan massa adsorben mendekati 3,50 g, konsentrasi awal 50-100 ppm, waktu kontak 10 menit, dan pH 9. Adsorpsi Cu2+ menggunakan silika gel hasil sintesis mengikuti isoterm adsorpsi Langmuir. Adapun morfologi pada silika gel hasil sintesis memiliki permukaan yang kasar dan tidak beraturan sedangkan setelah adsorpsi permukaan silika gel mengandung unsur Cu. Hal tersebut mengindikasikan bahwa logam Cu2+ telah teradsorp di permukaan.
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This study aims to apply the response surface methodology box-behnken design to determine the optimum conditions for silica extraction and Cu2+ adsorption using synthesized silica gel. The optimized factors in silica extraction are variations in the ratio of silica in glass bottle waste: NaOH 1:3, 1:4, and 1:5, particle size of glass bottle waste powder 75-62, 62-53, and 53-44 micrometer, and temperature 400, 600, and 800°C. The analysis results that the optimum conditions for extraction and synthesis of silica gel were close to the silica ratio in the waste glass bottle: NaOH 1: 3, the particle size of the waste glass powder was 75-62 micrometers, and the temperature was 800°C. Synthesized silica gel has an amorphous diffractogram at 2θ 20-30°, a pury of 75.63%, a surface area of 297.08 m2 /g, and a pore radius of 15.74 nm. Based on these data, the synthesized silica gel has the potential to become an adsorbent for heavy metals, in this case Cu2+. Determination of the optimum conditions for Cu2+ adsorption using the response surface methodology box-behnken design with an adsorbent mass variation of 2.50; 3.00; and 3.50 grams, initial concentration of 50; 75; and 100 ppm, contact time 10; 15; and 20 minutes, and pH 4, 7, and 10. The optimum adsorption conditions were obtained with an adsorbent mass approaching 3.50 g, initial concentration of 50-100 ppm, contact time of 10 minutes, and pH 9. Adsorption of Cu2+ using synthesized silica gel followed Langmuir adsorption isotherm. The morphology of the synthesized silica gel has a rough and irregular surface, while after adsorption the surface of the silica gel contains Cu elements. This indicates that Cu2+ has been adsorbed on the surface.

Item Type:	Thesis (Masters)
Additional Information:	RTKi 541.33 Per a-1 2022
Uncontrolled Keywords:	Adsorpsi, Silika Gel, Logam Cu2+, Limbah Botol Kaca Bahan Kimia, Silica Gel, Cu2+ Metal, Chemical Glass Bottle Waste
Subjects:	Q Science > QD Chemistry > QD547 Flocculation, precipitation, adsorption, etc. T Technology > TP Chemical technology > TP245.S5 Silica gel.
Divisions:	Faculty of Science and Data Analytics (SCIENTICS) > Chemistry > 47101-(S2) Master Thesis
Depositing User:	Anis Wulandari
Date Deposited:	15 Sep 2025 08:08
Last Modified:	15 Sep 2025 08:59
URI:	http://repository.its.ac.id/id/eprint/128245

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