Adsorption Of Chromium, Cadmium and Manganese Ions Using Nanomagnetic Alumina Composites From An Aqueous Solution

The discharge of chromium (Cr), cadmium (Cd) and manganese (Mn) effluents from industries may cause serious environmental effect on aquatic life and human due to their toxicity and harmful nature. Hence, the removal of these heavy metals from an aquatic system is very crucial. This study aimed to re...

Full description

Saved in:

Bibliographic Details
Main Author:	Hanafiah, Siti Fatimah Md
Format:	Thesis
Language:	English
Published:	2022
Subjects:	QD146-197 Inorganic chemistry
Online Access:	http://eprints.usm.my/57829/1/SITI%20FATIMAH%20BINTI%20MD%20HANAFIAH-FINAL%20THESIS%20P-SKM000220%28R%29%20-24%20pages.pdf
Tags:	Add Tag No Tags, Be the first to tag this record!

id	my-usm-ep.57829
record_format	uketd_dc
spelling	my-usm-ep.578292023-04-12T00:48:07Z Adsorption Of Chromium, Cadmium and Manganese Ions Using Nanomagnetic Alumina Composites From An Aqueous Solution 2022-09 Hanafiah, Siti Fatimah Md QD146-197 Inorganic chemistry The discharge of chromium (Cr), cadmium (Cd) and manganese (Mn) effluents from industries may cause serious environmental effect on aquatic life and human due to their toxicity and harmful nature. Hence, the removal of these heavy metals from an aquatic system is very crucial. This study aimed to remove Cr, Cd, and Mn ions from an aqueous solution using nanomagnetic alumina (Al) composites using two different methods, namely physical mixing (PM) and chemical precipitation (CP). Nanomagnetic Al composites which were nickel loaded alumina (NiAl), cobalt loaded alumina (CoAl) and iron-loaded alumina (FeAl) were applied in the adsorption process to compare their efficiencies towards Cr, Cd, and Mn ions. The adsorption of Cr, Cd and Mn ions were conducted in a batch system under varying initial pH (3-11), adsorbent dosage (0.01-0.06 g), initial concentration (10-100 mg L-1) and temperature (40-50℃). The adsorbents were characterised using X-Ray Diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscope (SEM), Brunauer–Emmett–Teller (BET), X-Ray Photoelectron Spectroscopy (XPS) and Electron Spin Resonance (ESR). The results showed that the nanomagnetic Al composite produced through PM method has a higher adsorption capacity as compared to the CP method. The adsorptivity of those adsorbents toward Cr, Cd and Mn ions was in the following order: FeAl > CoAl > NiAl> Al. FeAl was chosen as the best adsorbent. The characterisation result revealed that adsorptivity was significantly related to the interaction between Al frameworks with the metal composites which increase the magnetism properties especially for FeAl. XRD, FTIR, XPS and ESR analysis explained the occurrence of dealumination of Al and isomorphous substitution of each metal. FeAl was able to remove Cr, Cd and Mn ions with the adsorption capacity of 500.0 mg g-1, 285.7 mg g-1 and 3.883 mg g-1 respectively from an aqueous solution containing initial concentration of 25 mg L-1 at pH7 when using 0.05 g adsorbent, at 30℃ (Cd, Mn) and 40℃ (Cr). The best model for explaining the adsorption of Cr, Cd and Mn ions was the Langmuir model. The kinetics was best described by the pseudo-first-order model, while the thermodynamic study indicated that the adsorption was exothermic for Cr and both Cd and Mn were endothermic. However, the favourability of the adsorption was in the order of Cr>Cd>Mn. For all heavy metals ions, the adsorption process supports the non-spontaneous nature of the system. 2022-09 Thesis http://eprints.usm.my/57829/ http://eprints.usm.my/57829/1/SITI%20FATIMAH%20BINTI%20MD%20HANAFIAH-FINAL%20THESIS%20P-SKM000220%28R%29%20-24%20pages.pdf application/pdf en public masters Universiti Sains Malaysia Pusat Pengajian Sains Perubatan
institution	Universiti Sains Malaysia
collection	USM Institutional Repository
language	English
topic	QD146-197 Inorganic chemistry
spellingShingle	QD146-197 Inorganic chemistry Hanafiah, Siti Fatimah Md Adsorption Of Chromium, Cadmium and Manganese Ions Using Nanomagnetic Alumina Composites From An Aqueous Solution
description	The discharge of chromium (Cr), cadmium (Cd) and manganese (Mn) effluents from industries may cause serious environmental effect on aquatic life and human due to their toxicity and harmful nature. Hence, the removal of these heavy metals from an aquatic system is very crucial. This study aimed to remove Cr, Cd, and Mn ions from an aqueous solution using nanomagnetic alumina (Al) composites using two different methods, namely physical mixing (PM) and chemical precipitation (CP). Nanomagnetic Al composites which were nickel loaded alumina (NiAl), cobalt loaded alumina (CoAl) and iron-loaded alumina (FeAl) were applied in the adsorption process to compare their efficiencies towards Cr, Cd, and Mn ions. The adsorption of Cr, Cd and Mn ions were conducted in a batch system under varying initial pH (3-11), adsorbent dosage (0.01-0.06 g), initial concentration (10-100 mg L-1) and temperature (40-50℃). The adsorbents were characterised using X-Ray Diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscope (SEM), Brunauer–Emmett–Teller (BET), X-Ray Photoelectron Spectroscopy (XPS) and Electron Spin Resonance (ESR). The results showed that the nanomagnetic Al composite produced through PM method has a higher adsorption capacity as compared to the CP method. The adsorptivity of those adsorbents toward Cr, Cd and Mn ions was in the following order: FeAl > CoAl > NiAl> Al. FeAl was chosen as the best adsorbent. The characterisation result revealed that adsorptivity was significantly related to the interaction between Al frameworks with the metal composites which increase the magnetism properties especially for FeAl. XRD, FTIR, XPS and ESR analysis explained the occurrence of dealumination of Al and isomorphous substitution of each metal. FeAl was able to remove Cr, Cd and Mn ions with the adsorption capacity of 500.0 mg g-1, 285.7 mg g-1 and 3.883 mg g-1 respectively from an aqueous solution containing initial concentration of 25 mg L-1 at pH7 when using 0.05 g adsorbent, at 30℃ (Cd, Mn) and 40℃ (Cr). The best model for explaining the adsorption of Cr, Cd and Mn ions was the Langmuir model. The kinetics was best described by the pseudo-first-order model, while the thermodynamic study indicated that the adsorption was exothermic for Cr and both Cd and Mn were endothermic. However, the favourability of the adsorption was in the order of Cr>Cd>Mn. For all heavy metals ions, the adsorption process supports the non-spontaneous nature of the system.
format	Thesis
qualification_level	Master's degree
author	Hanafiah, Siti Fatimah Md
author_facet	Hanafiah, Siti Fatimah Md
author_sort	Hanafiah, Siti Fatimah Md
title	Adsorption Of Chromium, Cadmium and Manganese Ions Using Nanomagnetic Alumina Composites From An Aqueous Solution
title_short	Adsorption Of Chromium, Cadmium and Manganese Ions Using Nanomagnetic Alumina Composites From An Aqueous Solution
title_full	Adsorption Of Chromium, Cadmium and Manganese Ions Using Nanomagnetic Alumina Composites From An Aqueous Solution
title_fullStr	Adsorption Of Chromium, Cadmium and Manganese Ions Using Nanomagnetic Alumina Composites From An Aqueous Solution
title_full_unstemmed	Adsorption Of Chromium, Cadmium and Manganese Ions Using Nanomagnetic Alumina Composites From An Aqueous Solution
title_sort	adsorption of chromium, cadmium and manganese ions using nanomagnetic alumina composites from an aqueous solution
granting_institution	Universiti Sains Malaysia
granting_department	Pusat Pengajian Sains Perubatan
publishDate	2022
url	http://eprints.usm.my/57829/1/SITI%20FATIMAH%20BINTI%20MD%20HANAFIAH-FINAL%20THESIS%20P-SKM000220%28R%29%20-24%20pages.pdf
_version_	1776101211033829376

Adsorption Of Chromium, Cadmium and Manganese Ions Using Nanomagnetic Alumina Composites From An Aqueous Solution

Similar Items