Pengaruh Variasi Fraksi Fotokatalis ZnO/TiO2 Terhadap Kinetika Degradasi Polutan Organik dalam Air Limbah Terbuang Pada Reaktor Fotokatalisis Tipe Fixed-Bed

Afif, Yurham (2021) Pengaruh Variasi Fraksi Fotokatalis ZnO/TiO2 Terhadap Kinetika Degradasi Polutan Organik dalam Air Limbah Terbuang Pada Reaktor Fotokatalisis Tipe Fixed-Bed. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Reaksi fotokatalisis dengan konsep Advanced Oxydation Process (AOP) merupakan metode dekomposisi polutan organik yang banyak dikembangkan karena kelebihannya yaitu tidak menghasilkan residu berbahaya. Pada penelitian Tugas Akhir ini dilakukan investigasi pengaruh variasi fraksi massa komposit ZnO/TiO2 terhadap kinetika degradasi polutan organik dalam air limbah terbuang pada reaktor fotokatalisis tipe fixed-bed. Sifat-sifat optik, fisik dan elektronik diuji untuk mengetahu kemampuan absorbsi dan struktur pita energinya dalam proses degradasi methylene blue (MB) dan methyl orange (MO). Diketahui bahwa komposisi fotokatalis ZnO/TiO2 yang optimal untuk proses fotodegradasi polutan organik adalah fraksi massa 1:1 yang dapat dilihat dari karakterisasi morfologi permukaan dan kemampuan absorpsi intraband yang muncul karena cacat material. Fraksi ini juga menunjukkan performa degradasi terbaik dengan menunjukkan konsentrasi larutan akhir yang terendah dalam reaktor fotokatalisis skala laboratorium (6 jam) dan reaktor tipe fixed bed (8 jam). Berdasarkan beberapa model adsorpsi, model pseudo-second order representatif terhadap proses degradasi MB akibat penyerapan kimia (kemisorpsi) yang melibatkan gaya valensi melalui pembagian atau pertukaran elektron antara adsorben dan adsorbat yang terjadi di situs homogen tertentu dalam adsorben secara isotermal berdasarkan model adsorpsi isotermal Langmuir. ===================================================================================================== Photocatalysis reaction relying on the Advanced Oxidation Process (AOP) is a decomposition method for organic pollutant that has been widely developed since it does not produce harmful residues. In this final project, an investigation was carried out to investigate the effect of variations in the mass fraction of ZnO/TiO2 composites on the degradation kinetics of organic pollutants in wastewater employing a fixed-bed photocatalytic reactor. The optical, physical and electronic properties were assessed to determine the absorption ability and energy band structure in the degradation process of methylene blue (MB) and methyl orange (MO). The results indicate that the optimal composition of the ZnO/TiO2 photocatalyst for the photodegradation process of organic pollutants is 1:1 mass fraction which can be seen from the characterization of the surface morphology and the intraband absorption due to material defects. This fraction shows the maximum photodegradation performance with the lowest final solution concentration in laboratory scale reactor (6 hours) and fixed-bed type reactor (8 hours). Based on several adsorption models, this research reveals that the pseudo-second order model is representative of the MB degradation process which is mainly chemical absorption (chemisorption) involving valence forces through sharing or exchange of electrons between the adsorbent and the adsorbate that occurs at certain homogeneous sites in the adsorbent isothermally based on the Langmuir isothermal adsorption model.

Item Type: Thesis (Undergraduate)
Uncontrolled Keywords: Photocatalysis, Fotokatalisis, Methylene blue, Methyl orange, TiO2, ZnO
Subjects: Q Science > QC Physics > QC162 Adsorption and absorption
Q Science > QC Physics > QC173.4.C63 Composite materials
Q Science > QD Chemistry > QD117 Absorption
Q Science > QD Chemistry > QD181.Z6 Zinc oxide
Q Science > QD Chemistry > QD501 Catalysis. Catalysts.
Q Science > QD Chemistry > QD547 Flocculation, precipitation, adsorption, etc.
Q Science > QD Chemistry > QD716 Photocatalysis.
Divisions: Faculty of Industrial Technology and Systems Engineering (INDSYS) > Physics Engineering > 30201-(S1) Undergraduate Thesis
Depositing User: Yurham Afif
Date Deposited: 22 Aug 2021 03:46
Last Modified: 22 Aug 2021 03:46
URI: https://repository.its.ac.id/id/eprint/88561

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