Adsorption mechanism and kinetic of hybrid magnetic KNF-CHT-ALG-Fe3O4@SiO2 hydrogel composite for Pb (II) ions in wastewater / Nurul Ain Shafiqah Anuar

Excessive toxic metals are commonly found in polluted wastewater. This study aimed to synthesise kenaf-based adsorbents for the adsorption of lead (II) ions. The physical and chemical characteristics of the kenaf (KNF) core and fibre were determined using field emission scanning electron microscope...

Full description

Saved in:

Bibliographic Details
Main Author:	Anuar, Nurul Ain Shafiqah
Format:	Thesis
Language:	English
Published:	2022
Subjects:	Water pollution
Online Access:	https://ir.uitm.edu.my/id/eprint/78103/1/78103.pdf
Tags:	Add Tag No Tags, Be the first to tag this record!

id	my-uitm-ir.78103
record_format	uketd_dc
spelling	my-uitm-ir.781032023-06-01T04:42:19Z Adsorption mechanism and kinetic of hybrid magnetic KNF-CHT-ALG-Fe3O4@SiO2 hydrogel composite for Pb (II) ions in wastewater / Nurul Ain Shafiqah Anuar 2022 Anuar, Nurul Ain Shafiqah Water pollution Sewage collection and disposal systems. Sewerage Excessive toxic metals are commonly found in polluted wastewater. This study aimed to synthesise kenaf-based adsorbents for the adsorption of lead (II) ions. The physical and chemical characteristics of the kenaf (KNF) core and fibre were determined using field emission scanning electron microscope (FESEM), thermogravimetric analysis (TGA), and Fourier-transform infrared spectroscopy (FTIR). The further synthesised beads were characterised through FESEM and FTIR, while inductively coupled plasma (ICP) was employed to determine the percentage of adsorption. The FESEM analysis demonstrated that the KNF core had a rougher surface morphology than the KNF fibre. The TGA analysis confirmed that the KNF core was coarser and contained a higher residue of approximately 75.91%. The FTIR spectra established intense functional groups in the KNF core, such as hydroxyl and carboxyl, attracting more Pb (II) ions. The KNF core was then used to synthesise KNF-CHT-ALG and KNF-CHT-ALG-Fe3O4@SiO2 beads. The beads confirmed the enhancement in surface morphology and the existence of numerous functional groups for Pb (II) ions to bind. The ICP analysis demonstrated highest removal of Pb (II) ion onto KNF-CHT-ALG beads with percentage of 95%. Additionally, batch adsorption experiments were conducted at pH 2–7, initial Pb (II) ions concentration of 50-250 mg/L and contact time at 5–60 minutes. The isotherm and kinetic study of the adsorption fitted well to Langmuir model and the Pseudo-Second Order model with an R2 value of 0.9938 and 0.9999, respectively. The maximum adsorption capacity of Pb (II) ions onto KNF-CHT-ALG beads is 33.557 mg/g. After 5 times of recycling process, the KNF-CHT-ALG beads still showed good adsorption towards Pb (II) ions with maximum removal of 95%. The KNF is a crop found in abundance in Malaysia, which could reduce the production cost of adsorbents. The significant outcomes would minimise the dependency on chemical adsorbents and accelerate the removal process of heavy metals in wastewater. 2022 Thesis https://ir.uitm.edu.my/id/eprint/78103/ https://ir.uitm.edu.my/id/eprint/78103/1/78103.pdf text en public masters Universiti Teknologi MARA (UiTM) College of Engineering Lokman, Nurul Fariha
institution	Universiti Teknologi MARA
collection	UiTM Institutional Repository
language	English
advisor	Lokman, Nurul Fariha
topic	Water pollution Water pollution
spellingShingle	Water pollution Water pollution Anuar, Nurul Ain Shafiqah Adsorption mechanism and kinetic of hybrid magnetic KNF-CHT-ALG-Fe3O4@SiO2 hydrogel composite for Pb (II) ions in wastewater / Nurul Ain Shafiqah Anuar
description	Excessive toxic metals are commonly found in polluted wastewater. This study aimed to synthesise kenaf-based adsorbents for the adsorption of lead (II) ions. The physical and chemical characteristics of the kenaf (KNF) core and fibre were determined using field emission scanning electron microscope (FESEM), thermogravimetric analysis (TGA), and Fourier-transform infrared spectroscopy (FTIR). The further synthesised beads were characterised through FESEM and FTIR, while inductively coupled plasma (ICP) was employed to determine the percentage of adsorption. The FESEM analysis demonstrated that the KNF core had a rougher surface morphology than the KNF fibre. The TGA analysis confirmed that the KNF core was coarser and contained a higher residue of approximately 75.91%. The FTIR spectra established intense functional groups in the KNF core, such as hydroxyl and carboxyl, attracting more Pb (II) ions. The KNF core was then used to synthesise KNF-CHT-ALG and KNF-CHT-ALG-Fe3O4@SiO2 beads. The beads confirmed the enhancement in surface morphology and the existence of numerous functional groups for Pb (II) ions to bind. The ICP analysis demonstrated highest removal of Pb (II) ion onto KNF-CHT-ALG beads with percentage of 95%. Additionally, batch adsorption experiments were conducted at pH 2–7, initial Pb (II) ions concentration of 50-250 mg/L and contact time at 5–60 minutes. The isotherm and kinetic study of the adsorption fitted well to Langmuir model and the Pseudo-Second Order model with an R2 value of 0.9938 and 0.9999, respectively. The maximum adsorption capacity of Pb (II) ions onto KNF-CHT-ALG beads is 33.557 mg/g. After 5 times of recycling process, the KNF-CHT-ALG beads still showed good adsorption towards Pb (II) ions with maximum removal of 95%. The KNF is a crop found in abundance in Malaysia, which could reduce the production cost of adsorbents. The significant outcomes would minimise the dependency on chemical adsorbents and accelerate the removal process of heavy metals in wastewater.
format	Thesis
qualification_level	Master's degree
author	Anuar, Nurul Ain Shafiqah
author_facet	Anuar, Nurul Ain Shafiqah
author_sort	Anuar, Nurul Ain Shafiqah
title	Adsorption mechanism and kinetic of hybrid magnetic KNF-CHT-ALG-Fe3O4@SiO2 hydrogel composite for Pb (II) ions in wastewater / Nurul Ain Shafiqah Anuar
title_short	Adsorption mechanism and kinetic of hybrid magnetic KNF-CHT-ALG-Fe3O4@SiO2 hydrogel composite for Pb (II) ions in wastewater / Nurul Ain Shafiqah Anuar
title_full	Adsorption mechanism and kinetic of hybrid magnetic KNF-CHT-ALG-Fe3O4@SiO2 hydrogel composite for Pb (II) ions in wastewater / Nurul Ain Shafiqah Anuar
title_fullStr	Adsorption mechanism and kinetic of hybrid magnetic KNF-CHT-ALG-Fe3O4@SiO2 hydrogel composite for Pb (II) ions in wastewater / Nurul Ain Shafiqah Anuar
title_full_unstemmed	Adsorption mechanism and kinetic of hybrid magnetic KNF-CHT-ALG-Fe3O4@SiO2 hydrogel composite for Pb (II) ions in wastewater / Nurul Ain Shafiqah Anuar
title_sort	adsorption mechanism and kinetic of hybrid magnetic knf-cht-alg-fe3o4@sio2 hydrogel composite for pb (ii) ions in wastewater / nurul ain shafiqah anuar
granting_institution	Universiti Teknologi MARA (UiTM)
granting_department	College of Engineering
publishDate	2022
url	https://ir.uitm.edu.my/id/eprint/78103/1/78103.pdf
_version_	1783736213211971584

Adsorption mechanism and kinetic of hybrid magnetic KNF-CHT-ALG-Fe3O4@SiO2 hydrogel composite for Pb (II) ions in wastewater / Nurul Ain Shafiqah Anuar

Similar Items