Photocatalytic degradation of pome over lanthanum doped calcium oxide derived from cockle shells

Palm Oil Mill Effluent (POME) is one of the main problems faces by oil palm industry in Malaysia due to its high chemical oxygen demand (COD) and biochemical oxygen demand (BOD). Recently, photocatalysFis has been used in several studies to treat wastewater due to its ability to mineralize the organ...

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Main Author:	Siti Shariah, Ghazali
Format:	Thesis
Language:	English
Published:	2020
Subjects:	QD Chemistry
Online Access:	http://umpir.ump.edu.my/id/eprint/35250/1/Photocatalytic%20degradation%20of%20pome%20over%20lanthanum%20doped%20calcium%20oxide.ir.pdf
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spelling	my-ump-ir.352502022-10-14T02:07:53Z Photocatalytic degradation of pome over lanthanum doped calcium oxide derived from cockle shells 2020-07 Siti Shariah, Ghazali QD Chemistry TA Engineering (General). Civil engineering (General) Palm Oil Mill Effluent (POME) is one of the main problems faces by oil palm industry in Malaysia due to its high chemical oxygen demand (COD) and biochemical oxygen demand (BOD). Recently, photocatalysFis has been used in several studies to treat wastewater due to its ability to mineralize the organic compounds. However, the common photocatalysts used in treating POME such as titanium oxide (TiO2) and zinc oxide (ZnO) consist of metals that have limited availability. On the other hand, cockle shells have been dumped and left untreated to the environment. As one possible solution to address both environmental problems, this study utilized cockle shell as renewable feedstock of calcium carbonate which was converted to calcium oxide (CaO) that was used as photocatalyst to treat POME. Therefore, the aim of this study is to investigate the ability of cockle shell waste to be transformed to CaO to act as photocatalyst in the treatment of POME via photocatalysis reaction. Lanthanum (La) was used in this study to act as dopant to enhance the photocatalytic activity of CaO. The CaO used in this study was converted from cockle shell wastes through calcination process at 900◦C where later the sample was denoted as Ca900. Ca900 was doped with 1 wt%, 3 wt% and 5 wt% of La using wet impregnation method where the doped photocatalyst were denoted as LaCa. Then, the photocatalysts were tested on POME under UV light in batch system by varying the effect of several operational parameters such as stirring speed, photocatalyst loadings, La loadings and oxidizing agent. All fresh and spent photocatalysts powder were characterized using fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), brunauer-emmett-teller (BET), scanning electron microsopy (SEM), energy dispersion X-ray analyser (EDX), thermogravimetric analysis (TGA), inductively coupled plasma mass spectrometry (ICP-MS) and UV-Vis diffuse reflectance spectra. The results obtained from this study show that it is achievable to produce CaO from cockle shell that can be used in photocatalytic degradation of POME. Through this research, it was found that 3 wt% of LaCa with 3.0 g/L of photocatalyst loadings at 300 rpm has highest photocatalytic activity with 54% removal compared to others. However, the removal efficiency of POME increases when oxygen as oxidizing agent were used which is 66% rather than during limited oxygen condition (54%). The kinetic data of POME degradation were fitted Langmuir-Hinshelwood kinetic model as first order reaction. In conclusion, the findings of this study imply that the contaminants in POME can be greatly reduced by utilizing La doped CaO which CaO derived from cockle shell waste. 2020-07 Thesis http://umpir.ump.edu.my/id/eprint/35250/ http://umpir.ump.edu.my/id/eprint/35250/1/Photocatalytic%20degradation%20of%20pome%20over%20lanthanum%20doped%20calcium%20oxide.ir.pdf pdf en public masters Universiti Malaysia Pahang Faculty of Chemical and Process Engineering Technology
institution	Universiti Malaysia Pahang Al-Sultan Abdullah
collection	UMPSA Institutional Repository
language	English
topic	QD Chemistry QD Chemistry
spellingShingle	QD Chemistry QD Chemistry Siti Shariah, Ghazali Photocatalytic degradation of pome over lanthanum doped calcium oxide derived from cockle shells
description	Palm Oil Mill Effluent (POME) is one of the main problems faces by oil palm industry in Malaysia due to its high chemical oxygen demand (COD) and biochemical oxygen demand (BOD). Recently, photocatalysFis has been used in several studies to treat wastewater due to its ability to mineralize the organic compounds. However, the common photocatalysts used in treating POME such as titanium oxide (TiO2) and zinc oxide (ZnO) consist of metals that have limited availability. On the other hand, cockle shells have been dumped and left untreated to the environment. As one possible solution to address both environmental problems, this study utilized cockle shell as renewable feedstock of calcium carbonate which was converted to calcium oxide (CaO) that was used as photocatalyst to treat POME. Therefore, the aim of this study is to investigate the ability of cockle shell waste to be transformed to CaO to act as photocatalyst in the treatment of POME via photocatalysis reaction. Lanthanum (La) was used in this study to act as dopant to enhance the photocatalytic activity of CaO. The CaO used in this study was converted from cockle shell wastes through calcination process at 900◦C where later the sample was denoted as Ca900. Ca900 was doped with 1 wt%, 3 wt% and 5 wt% of La using wet impregnation method where the doped photocatalyst were denoted as LaCa. Then, the photocatalysts were tested on POME under UV light in batch system by varying the effect of several operational parameters such as stirring speed, photocatalyst loadings, La loadings and oxidizing agent. All fresh and spent photocatalysts powder were characterized using fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), brunauer-emmett-teller (BET), scanning electron microsopy (SEM), energy dispersion X-ray analyser (EDX), thermogravimetric analysis (TGA), inductively coupled plasma mass spectrometry (ICP-MS) and UV-Vis diffuse reflectance spectra. The results obtained from this study show that it is achievable to produce CaO from cockle shell that can be used in photocatalytic degradation of POME. Through this research, it was found that 3 wt% of LaCa with 3.0 g/L of photocatalyst loadings at 300 rpm has highest photocatalytic activity with 54% removal compared to others. However, the removal efficiency of POME increases when oxygen as oxidizing agent were used which is 66% rather than during limited oxygen condition (54%). The kinetic data of POME degradation were fitted Langmuir-Hinshelwood kinetic model as first order reaction. In conclusion, the findings of this study imply that the contaminants in POME can be greatly reduced by utilizing La doped CaO which CaO derived from cockle shell waste.
format	Thesis
qualification_level	Master's degree
author	Siti Shariah, Ghazali
author_facet	Siti Shariah, Ghazali
author_sort	Siti Shariah, Ghazali
title	Photocatalytic degradation of pome over lanthanum doped calcium oxide derived from cockle shells
title_short	Photocatalytic degradation of pome over lanthanum doped calcium oxide derived from cockle shells
title_full	Photocatalytic degradation of pome over lanthanum doped calcium oxide derived from cockle shells
title_fullStr	Photocatalytic degradation of pome over lanthanum doped calcium oxide derived from cockle shells
title_full_unstemmed	Photocatalytic degradation of pome over lanthanum doped calcium oxide derived from cockle shells
title_sort	photocatalytic degradation of pome over lanthanum doped calcium oxide derived from cockle shells
granting_institution	Universiti Malaysia Pahang
granting_department	Faculty of Chemical and Process Engineering Technology
publishDate	2020
url	http://umpir.ump.edu.my/id/eprint/35250/1/Photocatalytic%20degradation%20of%20pome%20over%20lanthanum%20doped%20calcium%20oxide.ir.pdf
_version_	1783732225394606080

Photocatalytic degradation of pome over lanthanum doped calcium oxide derived from cockle shells

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