Preparation and characterization of Fe₃O₄/montmorillonite and Fe₃O₄/talc nanocomposites for removal of heavy metals

Toxic metal contamination in water systems is a serious problem threating environment. Many researches have been done to develop effective ways for the heavy metals removal. Traditionally methods used for removal have some disadvantages, such as low efficiency and high cost. Adsorption is one of the...

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Main Author:	Kalantari, Katayoon
Format:	Thesis
Language:	English
Published:	2015
Subjects:	Montmorillonite - Absorption and adsorption Nanocomposites (Materials) Metals - Toxicology -Research
Online Access:	http://psasir.upm.edu.my/id/eprint/68169/1/FS%202015%2079%20IR.pdf
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id	my-upm-ir.68169
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spelling	my-upm-ir.681692019-05-10T00:50:06Z Preparation and characterization of Fe₃O₄/montmorillonite and Fe₃O₄/talc nanocomposites for removal of heavy metals 2015-01 Kalantari, Katayoon Toxic metal contamination in water systems is a serious problem threating environment. Many researches have been done to develop effective ways for the heavy metals removal. Traditionally methods used for removal have some disadvantages, such as low efficiency and high cost. Adsorption is one of the techniques use in this area due to its effectiveness and easy operation. In this work, Fe3O4/montmorillonite and Fe3O4/talc nanocomposites as nanoadsorbent were prepared by co-precipitation method in different percentages. The suitability of the magnetic nanocomposites for the adsorption of Cu2+, Ni2+ and Pb2+ ions and its efficiency were investigated. The Response Surface Methodology was used for designing the experiment sets. The analysis of variance for Cu2+, Ni2+ and Pb2+ removal was used to estimate the response of initial concentration of heavy metal ion (mg/L), removal time (s) and dosage of adsorbent (g). Transmission electron microscopy showed that the average nanoparticles size were between 8.24 to 12.88 and 6.62 to 8.13 nm for Fe3O4/montmorillonite and Fe3O4/talc nanocomposites, respectively. Scanning electron microscopy showed that the nanoparticles were highly uniform in size and spherical shape. X-ray diffraction and Energy-dispersive X-ray, confirmed that magnetic nanoparticles were prepared. Vibrating sample magnetometer reveals the nanoparticles were superparamagnetic. The Fe3O4/montmorillonite nanocomposite showed a better capability for adsorption of heavy metals from aqueous solution. The best interpretation for the equilibrium data was given by Langmuir isotherm and the kinetic data showed that the adsorption process followed the pseudo-second order kinetic model for both adsorbents. According to RSM results, for Fe3O4/montmorillonite nanocomposite, removal efficiency were 89.72%,94.89%, and 76.15% while the removal time was 120s, Fe3O4/montmorillonite nanocomposite amount were 0.06, 0.08 and 0.08 g and initial heavy metal concentrations were 510.16 for Cu2+, 182.94 for Ni2+ and 111.90 mg/L for Pb2+. Moreover for Fe3O4/talc nanocomposite, removal efficiency were 72.15%, 50.23%, and 91.35% while the removal time was 120s, Fe3O4/talc nanocomposite amount was 0.12 g and initial heavy metal concentrations were 100 for Cu2+, 92 for Ni2+ and 270 mg/L for Pb2+ ions. As a results two unique nano adsorbents made of montmorillonite and talc as a natural substrate and loaded magnetic nano particles were used to rapid remove of Cu2+, Ni2+ and Pb2+ ions from aqueous solution. The adsorbents can easily separate by an external magnetic field. Montmorillonite - Absorption and adsorption Nanocomposites (Materials) Metals - Toxicology -Research 2015-01 Thesis http://psasir.upm.edu.my/id/eprint/68169/ http://psasir.upm.edu.my/id/eprint/68169/1/FS%202015%2079%20IR.pdf text en public doctoral Universiti Putra Malaysia Montmorillonite - Absorption and adsorption Nanocomposites (Materials) Metals - Toxicology -Research
institution	Universiti Putra Malaysia
collection	PSAS Institutional Repository
language	English
topic	Montmorillonite - Absorption and adsorption Nanocomposites (Materials) Metals - Toxicology -Research
spellingShingle	Montmorillonite - Absorption and adsorption Nanocomposites (Materials) Metals - Toxicology -Research Kalantari, Katayoon Preparation and characterization of Fe₃O₄/montmorillonite and Fe₃O₄/talc nanocomposites for removal of heavy metals
description	Toxic metal contamination in water systems is a serious problem threating environment. Many researches have been done to develop effective ways for the heavy metals removal. Traditionally methods used for removal have some disadvantages, such as low efficiency and high cost. Adsorption is one of the techniques use in this area due to its effectiveness and easy operation. In this work, Fe3O4/montmorillonite and Fe3O4/talc nanocomposites as nanoadsorbent were prepared by co-precipitation method in different percentages. The suitability of the magnetic nanocomposites for the adsorption of Cu2+, Ni2+ and Pb2+ ions and its efficiency were investigated. The Response Surface Methodology was used for designing the experiment sets. The analysis of variance for Cu2+, Ni2+ and Pb2+ removal was used to estimate the response of initial concentration of heavy metal ion (mg/L), removal time (s) and dosage of adsorbent (g). Transmission electron microscopy showed that the average nanoparticles size were between 8.24 to 12.88 and 6.62 to 8.13 nm for Fe3O4/montmorillonite and Fe3O4/talc nanocomposites, respectively. Scanning electron microscopy showed that the nanoparticles were highly uniform in size and spherical shape. X-ray diffraction and Energy-dispersive X-ray, confirmed that magnetic nanoparticles were prepared. Vibrating sample magnetometer reveals the nanoparticles were superparamagnetic. The Fe3O4/montmorillonite nanocomposite showed a better capability for adsorption of heavy metals from aqueous solution. The best interpretation for the equilibrium data was given by Langmuir isotherm and the kinetic data showed that the adsorption process followed the pseudo-second order kinetic model for both adsorbents. According to RSM results, for Fe3O4/montmorillonite nanocomposite, removal efficiency were 89.72%,94.89%, and 76.15% while the removal time was 120s, Fe3O4/montmorillonite nanocomposite amount were 0.06, 0.08 and 0.08 g and initial heavy metal concentrations were 510.16 for Cu2+, 182.94 for Ni2+ and 111.90 mg/L for Pb2+. Moreover for Fe3O4/talc nanocomposite, removal efficiency were 72.15%, 50.23%, and 91.35% while the removal time was 120s, Fe3O4/talc nanocomposite amount was 0.12 g and initial heavy metal concentrations were 100 for Cu2+, 92 for Ni2+ and 270 mg/L for Pb2+ ions. As a results two unique nano adsorbents made of montmorillonite and talc as a natural substrate and loaded magnetic nano particles were used to rapid remove of Cu2+, Ni2+ and Pb2+ ions from aqueous solution. The adsorbents can easily separate by an external magnetic field.
format	Thesis
qualification_level	Doctorate
author	Kalantari, Katayoon
author_facet	Kalantari, Katayoon
author_sort	Kalantari, Katayoon
title	Preparation and characterization of Fe₃O₄/montmorillonite and Fe₃O₄/talc nanocomposites for removal of heavy metals
title_short	Preparation and characterization of Fe₃O₄/montmorillonite and Fe₃O₄/talc nanocomposites for removal of heavy metals
title_full	Preparation and characterization of Fe₃O₄/montmorillonite and Fe₃O₄/talc nanocomposites for removal of heavy metals
title_fullStr	Preparation and characterization of Fe₃O₄/montmorillonite and Fe₃O₄/talc nanocomposites for removal of heavy metals
title_full_unstemmed	Preparation and characterization of Fe₃O₄/montmorillonite and Fe₃O₄/talc nanocomposites for removal of heavy metals
title_sort	preparation and characterization of fe₃o₄/montmorillonite and fe₃o₄/talc nanocomposites for removal of heavy metals
granting_institution	Universiti Putra Malaysia
publishDate	2015
url	http://psasir.upm.edu.my/id/eprint/68169/1/FS%202015%2079%20IR.pdf
_version_	1747812554700226560

Preparation and characterization of Fe₃O₄/montmorillonite and Fe₃O₄/talc nanocomposites for removal of heavy metals

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