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Utilization Of Natural Clay Derivatives For The Effective Treatment Of Ametryn And Metolachlor

A new route for the conversion of natural clay, montmorillonite and bentonite into a series of new functionalized adsorbents via simple chemical treatment has been presented. The unique application for the effective remediation of secondary pesticides, ametryn and metalachlor, widely applied for the...

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Main Author: Ab Shattar, Siti Fairos
Format: Thesis
Language:English
Published: 2017
Subjects:
T Technology
TA1-2040 Engineering (General). Civil engineering (General)
Online Access:http://eprints.usm.my/46366/1/Utilization%20Of%20Natural%20Clay%20Derivatives%20For%20The%20Effective%20Treatment%20Of%20Ametryn%20And%20Metolachlor.pdf
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spelling my.usm.eprints.46366 http://eprints.usm.my/46366/ Utilization Of Natural Clay Derivatives For The Effective Treatment Of Ametryn And Metolachlor Ab Shattar, Siti Fairos T Technology TA1-2040 Engineering (General). Civil engineering (General) A new route for the conversion of natural clay, montmorillonite and bentonite into a series of new functionalized adsorbents via simple chemical treatment has been presented. The unique application for the effective remediation of secondary pesticides, ametryn and metalachlor, widely applied for the control of nuisance insects, plants and fungi has been attempted. The clays were subjected to hexadecyltrimethylammonium bromide (HDTMA) and acid modifications, while the novel application was examined using batch adsorption experiments by varying the operational parameters, initial concentration, contact time, and solution pH. The physical and chemical characteristics including the surface morphology, pore structural properties, surface functional groups, and zero-point-of-charge (pHzpc) were evaluated. Equilibrium data were simulated using the Langmuir, Freundlich and Temkin isotherm models, while the kinetic model was fitted to the pseudo-first order, pseudo-second order and Elovich kinetic equations. Result illustrated an encouraging performance towards the removal of ametryn and metolachlor. The adsorptive uptake of pesticides was found to be highly pH dependent, favouring the adsorption uptake of ametryn and metolachlor at the acidic condition. Increasing the initial concentrations from 25 mg/L to 150 mg/L, and 50 mg/L to 400 mg/L showed a greater adsorption uptake for ametryn of 23.89-132.09 mg/g, 23.36-128.46 mg/g, 12.49-50.12 mg/g, and 24.88-148.91 mg/g, for montmorillonite, AM and ANC, and AB, while the adsorption uptake of metolachlor increased from 7.23-38.69 mg/g, 7.32-26.15 mg/g and 18.45-48.98 mg/g, respectively for HM, HNC, and AB. Equilibrium data was satisfactory fitted to the Langmuir isotherm model, while the adsorption kinetic was best described by the pseudo-second order model. Examination of the textural structure verified pore development, with a series of cavities distributed around the surface, with the Brunauer-Emmett-Teller (BET) surface areas ranging from 2.12 to 245.64 m2/g. Morphological study supported the presumption that the intercalation of hexadecyltrimetylammonium bromide (HDTMA) and acid modification process was successfully attained. Alteration of Fourier-transform infrared spectroscopy (FTIR) bands signified the modification and development of the new functionalities on the clay derivatives. The findings supported the great potential of these clay-derivatives as an economically advantageous solution and viable technique for the successive remediation of pesticides contaminated water. 2017-08-01 Thesis NonPeerReviewed application/pdf en http://eprints.usm.my/46366/1/Utilization%20Of%20Natural%20Clay%20Derivatives%20For%20The%20Effective%20Treatment%20Of%20Ametryn%20And%20Metolachlor.pdf Ab Shattar, Siti Fairos (2017) Utilization Of Natural Clay Derivatives For The Effective Treatment Of Ametryn And Metolachlor. Masters thesis, Universiti Sains Malaysia.
institution Universiti Sains Malaysia
building Hamzah Sendut Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Sains Malaysia
content_source USM Institutional Repository
url_provider http://eprints.usm.my/
language English
topic T Technology
TA1-2040 Engineering (General). Civil engineering (General)
spellingShingle T Technology
TA1-2040 Engineering (General). Civil engineering (General)
Ab Shattar, Siti Fairos
Utilization Of Natural Clay Derivatives For The Effective Treatment Of Ametryn And Metolachlor
description A new route for the conversion of natural clay, montmorillonite and bentonite into a series of new functionalized adsorbents via simple chemical treatment has been presented. The unique application for the effective remediation of secondary pesticides, ametryn and metalachlor, widely applied for the control of nuisance insects, plants and fungi has been attempted. The clays were subjected to hexadecyltrimethylammonium bromide (HDTMA) and acid modifications, while the novel application was examined using batch adsorption experiments by varying the operational parameters, initial concentration, contact time, and solution pH. The physical and chemical characteristics including the surface morphology, pore structural properties, surface functional groups, and zero-point-of-charge (pHzpc) were evaluated. Equilibrium data were simulated using the Langmuir, Freundlich and Temkin isotherm models, while the kinetic model was fitted to the pseudo-first order, pseudo-second order and Elovich kinetic equations. Result illustrated an encouraging performance towards the removal of ametryn and metolachlor. The adsorptive uptake of pesticides was found to be highly pH dependent, favouring the adsorption uptake of ametryn and metolachlor at the acidic condition. Increasing the initial concentrations from 25 mg/L to 150 mg/L, and 50 mg/L to 400 mg/L showed a greater adsorption uptake for ametryn of 23.89-132.09 mg/g, 23.36-128.46 mg/g, 12.49-50.12 mg/g, and 24.88-148.91 mg/g, for montmorillonite, AM and ANC, and AB, while the adsorption uptake of metolachlor increased from 7.23-38.69 mg/g, 7.32-26.15 mg/g and 18.45-48.98 mg/g, respectively for HM, HNC, and AB. Equilibrium data was satisfactory fitted to the Langmuir isotherm model, while the adsorption kinetic was best described by the pseudo-second order model. Examination of the textural structure verified pore development, with a series of cavities distributed around the surface, with the Brunauer-Emmett-Teller (BET) surface areas ranging from 2.12 to 245.64 m2/g. Morphological study supported the presumption that the intercalation of hexadecyltrimetylammonium bromide (HDTMA) and acid modification process was successfully attained. Alteration of Fourier-transform infrared spectroscopy (FTIR) bands signified the modification and development of the new functionalities on the clay derivatives. The findings supported the great potential of these clay-derivatives as an economically advantageous solution and viable technique for the successive remediation of pesticides contaminated water.
format Thesis
author Ab Shattar, Siti Fairos
author_facet Ab Shattar, Siti Fairos
author_sort Ab Shattar, Siti Fairos
title Utilization Of Natural Clay Derivatives For The Effective Treatment Of Ametryn And Metolachlor
title_short Utilization Of Natural Clay Derivatives For The Effective Treatment Of Ametryn And Metolachlor
title_full Utilization Of Natural Clay Derivatives For The Effective Treatment Of Ametryn And Metolachlor
title_fullStr Utilization Of Natural Clay Derivatives For The Effective Treatment Of Ametryn And Metolachlor
title_full_unstemmed Utilization Of Natural Clay Derivatives For The Effective Treatment Of Ametryn And Metolachlor
title_sort utilization of natural clay derivatives for the effective treatment of ametryn and metolachlor
publishDate 2017
url http://eprints.usm.my/46366/1/Utilization%20Of%20Natural%20Clay%20Derivatives%20For%20The%20Effective%20Treatment%20Of%20Ametryn%20And%20Metolachlor.pdf
http://eprints.usm.my/46366/
_version_ 1717094460018393088
score 13.211869

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