Penerapan Desain Eksperimen Box-Behnken Pada Sintesis Silika Gel Dari Limbah Botol Bahan Kimia Dan Aplikasinya Sebagai Adsorben

Subandi, Ayu Perdana Kusumaningtyas (2022) Penerapan Desain Eksperimen Box-Behnken Pada Sintesis Silika Gel Dari Limbah Botol Bahan Kimia Dan Aplikasinya Sebagai Adsorben. Masters thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Limbah botol bahan kimia merupakan salah satu sumber silika yang dapat dimanfaatkan untuk berbagai aplikasi, salah satunya adalah adsorben ion logam. Ekstraksi silika dari limbah botol bahan kimia dilakukan dengan mereaksikan bubuk limbah botol bahan kimia dengan NaOH melalui metode fusi alkali dan natrium silikat hasil fusi alkali direaksikan dengan HCl melalui metode sol-gel. Silika gel hasil ekstraksi digunakan sebagai adsorben ion logam Zn. Desain Box-Behnken digunakan dalam proses ekstraksi SiO2 dan proses adsorpsi ion logam Zn. . Response Surface Methodology (RSM) digunakan untuk mengetahui pengaruh variabel bebas terhadap respon, hubungan antara variabel bebas dan respon serta kondisi proses yang menghasilkan respon terbaik. Kurva Response Surface Methodology (RSM) menunjukkan bahwa kondisi optimal untuk ekstraksi silika menggunakan metode fusi alkali adalah dengan rasio SiO2 : NaOH 1:3, rentang ukuran partikel 74-63 µm (200-230 mesh), dan suhu reaksi pada 800 °C. Nilai persen teoritis berdasarkan perhitungan menggunakan persamaan polinomial dan kondisi optimum yang telah ditetapkan diperoleh sebesar 99,05%. Koefisien determinasi untuk persamaan polinomial (R2 ) adalah 0,943. Silika gel dikarakterisasi menggunakan metode XRD, XRF, SEM-EDX and Surface Area Analyzer (SAA). Pengukuran konsentrasi ion logam Zn dalam larutan menggunakan instrumen AAS. Kondisi optimum proses adsorpsi ion Zn2+ menggunakan silika gel berdasarkan RSM pada rentang massa adsorben 1,0-1,4 dan 1,5 - 2,0 gram, rentang konsentrasi awal: 30 - 90 ppm, rentang waktu kontak: 40 - 45 menit, pH: 7 - 9 dengan persen removal optimum secara teoritis sebesar 99,92%. Persamaan polinomial dari proses adsorpsi ion Zn2+ menggunakan silika gel memiliki koefisien determinasi (R2 ) sebesar 0,907. Model isoterm adsorpsi yang sesuai untuk adsorpsi ion Zn2+ menggunakan silika gel adalah model isoterm Langmuir dengan R2 sebesar 0,9989.
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Chemical bottle waste has been successfully converted to silica gels. Silica gel is widely used for various applications, one of which is the metal ion adsorbent in solution. Silica extraction from chemical bottle waste was carried out by reacting chemical bottle waste powder with NaOH through the alkali fusion method. The silica gel was deposited from the alkaline fusion result using HCl. Silica gel a obtained was applied as Zn ions adsorbent. Box-Behnken design was used both in the silica extraction process and Zn ion adsorption proccesses.The influence of independent variables, relationships between independent variables andconditions were analyzed using Response Surface Methodology (RSM). The optimum conditions in the extraction process by alkaline fusion method were the SiO2: NaOH ratio of 1:3, the particle size range of 74-63 μm (200-230 mesh), and the reaction temperature of 800°C. The theoretical recovery based on calculations using polynomial equations and the optimum conditions that have been established obtained a result of 99.90%. The correlation coefficient for polynomial equations (R2 ) was 0.943. Silica gel was characterized ususing XRD, XRF, SEM-EDX and Surface Area Analyzer (SAA) methods. The concentration of Zn ions in solution was measured using AAS. The optimum Zn2+ ion adsorption on silica gels was obtained at the adsorbent mass range of 1.0 - 1.4 and 1.5 – 2.0 grams, initial concentration range: 30 - 90 ppm, contact time range: 40 - 45 minutes, pH: 7 – 9 with theoretical optimum removal of 99.92%. The polynomial equation of the Zn2+ ion adsorption using silica gel has a correlation coefficient (R2 ) of 0.907. The adsorption isotherm model that suitable for the adsorption of Zn2+ ions using silica gel was Langmuir isothermic model with an R2 of 0.9989.

Item Type:	Thesis (Masters)
Additional Information:	RTKi 541.345 13 Sub p-1 2022
Uncontrolled Keywords:	Silika Gel, Box-Behnken, Metode Fusi Alkali, Metode sol-gel, Adsorpsi, Logam Zn
Subjects:	T Technology > TP Chemical technology > TP245.S5 Silica gel.
Divisions:	Faculty of Science and Data Analytics (SCIENTICS) > Chemistry > 47201-(S1) Undergraduate Thesis
Depositing User:	- Davi Wah
Date Deposited:	28 Nov 2023 04:35
Last Modified:	28 Nov 2023 04:35
URI:	http://repository.its.ac.id/id/eprint/105216

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