Adsorpsi Cu2+ Menggunakan SiO2 Dari Limbah Ampas Tebu (Saccharum officinarum): Optimasi Menggunakan Response Surface Methodology (RSM)-Central Composite Design (CCD)

Amor, Yuvita Anggraeni Dwi (2024) Adsorpsi Cu2+ Menggunakan SiO2 Dari Limbah Ampas Tebu (Saccharum officinarum): Optimasi Menggunakan Response Surface Methodology (RSM)-Central Composite Design (CCD). Other thesis, Institut Teknologi Sepuluh Nopember.

Text 5004201049-Undergraduate_Thesis.pdf - Accepted Version Restricted to Repository staff only until 1 October 2026. Download (3MB) | Request a copy

Abstract

Nilai ambang batas Tembaga (Cu) di perairan Indonesia berkisar antara 0,02-0,05 mg/L sehingga jumlah tembaga di perairan maupun limbah harus dikendalikan agar tidak melebihi baku mutu yang berlaku. Pengendalian ini dapat dilakukan dengan cara adsorpsi. Salah satu hal yang mempengaruhi efesiensi adsorpsi adalah adsorben. Silika merupakan material yang seringkali dijadikan adsorben karena memiliki kapasitas adsorpsi yang cukup baik. Selain itu, silika sudah banyak diaplikasikan karena toksisitasnya rendah, porositas tinggi, dan memiliki luas permukaan spesifik. Oleh karena itu, pada penelitian ini telah dilakukan pembuatan adsorben silika yang dibuat dari limbah ampas tebu untuk menghilangkan ion tembaga dalam larutan. Sintesis silika dilakukan dengan metode sol-gel. Silika yang diperoleh dikarakterisasi menggunakan XRD, FTIR, XRF, SEM-EDX dan Surface Area Analyzer untuk mendapatkan sifat silika. Adsorpsi Cu2+ dioptimasi menggunakan Central Composite Design (CCD). CCD digunakan untuk mengetahui kondisi optimum dari penghilangan ion tembaga yang melibatkan beberapa variabel independen. Variabel independen yang dioptimalkan meliputi dosis adsorben (15;20;25 mg), konsentrasi awal larutan ion tembaga (10;25;50 ppm), dan waktu kontak (20;40;60 menit). Response Surface Methodology (RSM) diterapkan untuk memvisualisasikan korelasi variabel independen terhadap penghilangan ion tembaga. Silika yang disintesis menunjukkan pola difraksi sinar-X pada 2θ = 17°-27° yang sesuai dengan puncak khas pada serapan silika. Berdasarkan hasil XRF, kemurnian dari silika yang disintesis adalah 79,60%. Silika mengandung gugus Silanol dan Si-O-Si berdasarkan spektrum FTIR. SEM-EDX menunjukkan bentuk yang tidak teratur pada silika. Metode BJH menunjukkan silika hasil sintesis mempunyai rata-rata ukuran pori 7,13 nm dan volume pori 0,35 cc/g. Sedangkan metode BET menunjukkan luas permukaan silika mencapai 97,408 m2/g. Kemudian berdasarkan optimasi RSM-CCD, kondisi optimum adsorpsi Cu2+ oleh silika tercapai saat dosis adsorben 25 mg, konsentrasi awal 20 ppm, dan waktu kontak 10 menit karena mampu menyerap ion tembaga hingga 97,22%.
==============================================================================================================================
The threshold value for Copper (Cu) in Indonesian waters ranges between 0.02-0.05 mg/L, so the amount of copper in water and wastewater must be controlled to not exceed the applicable quality standards. This control can be achieved through adsorption. One factor that affects adsorption efficiency is the adsorbent. Silica is often used as an adsorbent because it has good adsorption capacity. Additionally, silica has been widely applied due to its low toxicity, high porosity, and large specific surface area. Therefore, in this study, silica adsorbent was synthesized from sugarcane bagasse waste to remove copper ions from the solution. Silica synthesis was carried out using the sol-gel method. The obtained silica was characterized using XRD, FTIR, XRF, SEM-EDX, and Surface Area Analyzer to determine the properties of silica. Cu²⁺ adsorption was optimized using Central Composite Design (CCD). CCD was used to determine the optimal conditions for copper ion removal involving several independent variables. The independent variables optimized included adsorbent dose (15, 20, 25 mg), initial concentration of copper ion solution (10, 25, 50 ppm), and contact time (20, 40, 60 minutes). Response Surface Methodology (RSM) was applied to visualize the correlation between the independent variables and copper ion removal. The synthesized silica showed X-ray diffraction patterns at 2θ = 17°-27°, consistent with characteristic peaks for silica absorption. According to the XRF results, the purity of the synthesized silica was 79.60%. Silica contains characteristic Si-O-Si and silanol groups based on the FTIR spectrum. SEM-EDX revealed an irregular shape in the silica. The BJH method indicates that the synthesized silica has an average pore size of 7.13 nm and a pore volume of 0.35 cc/g, while the BET method showed that the silica’s surface area reached 97.408 m²/g. Then, based on RSM-CCD optimization, the optimum conditions for adsorption of Cu2+ by silica were achieved when the adsorbent dose was 25 mg, the initial concentration was 20 ppm, and the contact time was 10 minutes because it was able to absorb up to 97.22% copper ions.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Adsorption, Copper, RSM-CCD, Silica, Sugarcane Bagasse Adsorpsi, Ampas tebu, Silika, Tembaga
Subjects:	Q Science > QD Chemistry > QD75.2 Chemistry, Analytic
Divisions:	Faculty of Science and Data Analytics (SCIENTICS) > Chemistry > 47201-(S1) Undergraduate Thesis
Depositing User:	Yuvita Anggraeni Dwi Amor
Date Deposited:	23 Aug 2024 02:32
Last Modified:	23 Aug 2024 02:32
URI:	http://repository.its.ac.id/id/eprint/112922

Actions (login required)

View Item