Relative efficiency comparison of carboxymethyl cellucose (CMC) stabilized Fe-0 and Fe-0/Ag nanoparticles for rapid degradation of chlorpyrifos in aqueous solutions

This study investigated the rate of chlorpyrifos degradation with different carboxymethyl cellulose (CMC) stabilized and unstabilized iron-based nanoparticles viz. CMC-Fe-0, CMC-Fe-0/Ag and Fe-0 under different concentrations of chlorpyrifos. FT-IR and SEM analysis indicated that CMC molecules were...

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Main Authors: Reddy, A. V. Bhaskar, Jaafar, J., Majid, Z. Abdul, Aris, A., Umar, K., Talib, J., Madhavi, G.
Format: Article
Published: Inst Materials Physics 2015
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Online Access:http://eprints.utm.my/id/eprint/55257/
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spelling my.utm.552572016-09-04T01:34:50Z http://eprints.utm.my/id/eprint/55257/ Relative efficiency comparison of carboxymethyl cellucose (CMC) stabilized Fe-0 and Fe-0/Ag nanoparticles for rapid degradation of chlorpyrifos in aqueous solutions Reddy, A. V. Bhaskar Jaafar, J. Majid, Z. Abdul Aris, A. Umar, K. Talib, J. Madhavi, G. TP Chemical technology This study investigated the rate of chlorpyrifos degradation with different carboxymethyl cellulose (CMC) stabilized and unstabilized iron-based nanoparticles viz. CMC-Fe-0, CMC-Fe-0/Ag and Fe-0 under different concentrations of chlorpyrifos. FT-IR and SEM analysis indicated that CMC molecules were adsorbed to nanoparticles through the carboxylate (COO-) and hydroxyl (OH-) groups. All CMC stabilized nanoparticles exhibited excellent stability against aggregation because of both electrostatic and steric repulsions. The capability of CMC stabilized nanoparticles for the degradation of chlorpyrifos was investigated, which showed the maximum degradation with CMC-Fe-0/Ag and the least with Fe-0 nanoparticles when treated for about 4.0 hrs. The calculated first order rate constants (k(obs)) were 0.377 hr(-1), 0.555 hr(-1) and 0.749 hr(-1) for Fe-0, CMC-Fe-0 and CMC-Fe-0/Ag nanoparticles respectively. The rate of degradation increased as a function of Ag concentration in CMC-Fe-0/Ag nanoparticles. Temperature was also played an important role on the chlorpyrifos degradation, in which the rate constant of CMC-Fe-0/Ag nanoparticles declined from 0.910 hr(-1) to 0.690 hr(-1) when the temperature was altered from 35 degrees C to 25 degrees C. The stability experiments revealed that the CMC-Fe-0/Ag nanoparticles were stable and they were capable for the degradation of chlorpyrifos even after 3 months of their preparation. Inst Materials Physics 2015-04 Article PeerReviewed Reddy, A. V. Bhaskar and Jaafar, J. and Majid, Z. Abdul and Aris, A. and Umar, K. and Talib, J. and Madhavi, G. (2015) Relative efficiency comparison of carboxymethyl cellucose (CMC) stabilized Fe-0 and Fe-0/Ag nanoparticles for rapid degradation of chlorpyrifos in aqueous solutions. Digest Journal of Nanomaterials and Biostructures, 10 (2). pp. 331-340. ISSN 1842-3582
institution Universiti Teknologi Malaysia
building UTM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Malaysia
content_source UTM Institutional Repository
url_provider http://eprints.utm.my/
topic TP Chemical technology
spellingShingle TP Chemical technology
Reddy, A. V. Bhaskar
Jaafar, J.
Majid, Z. Abdul
Aris, A.
Umar, K.
Talib, J.
Madhavi, G.
Relative efficiency comparison of carboxymethyl cellucose (CMC) stabilized Fe-0 and Fe-0/Ag nanoparticles for rapid degradation of chlorpyrifos in aqueous solutions
description This study investigated the rate of chlorpyrifos degradation with different carboxymethyl cellulose (CMC) stabilized and unstabilized iron-based nanoparticles viz. CMC-Fe-0, CMC-Fe-0/Ag and Fe-0 under different concentrations of chlorpyrifos. FT-IR and SEM analysis indicated that CMC molecules were adsorbed to nanoparticles through the carboxylate (COO-) and hydroxyl (OH-) groups. All CMC stabilized nanoparticles exhibited excellent stability against aggregation because of both electrostatic and steric repulsions. The capability of CMC stabilized nanoparticles for the degradation of chlorpyrifos was investigated, which showed the maximum degradation with CMC-Fe-0/Ag and the least with Fe-0 nanoparticles when treated for about 4.0 hrs. The calculated first order rate constants (k(obs)) were 0.377 hr(-1), 0.555 hr(-1) and 0.749 hr(-1) for Fe-0, CMC-Fe-0 and CMC-Fe-0/Ag nanoparticles respectively. The rate of degradation increased as a function of Ag concentration in CMC-Fe-0/Ag nanoparticles. Temperature was also played an important role on the chlorpyrifos degradation, in which the rate constant of CMC-Fe-0/Ag nanoparticles declined from 0.910 hr(-1) to 0.690 hr(-1) when the temperature was altered from 35 degrees C to 25 degrees C. The stability experiments revealed that the CMC-Fe-0/Ag nanoparticles were stable and they were capable for the degradation of chlorpyrifos even after 3 months of their preparation.
format Article
author Reddy, A. V. Bhaskar
Jaafar, J.
Majid, Z. Abdul
Aris, A.
Umar, K.
Talib, J.
Madhavi, G.
author_facet Reddy, A. V. Bhaskar
Jaafar, J.
Majid, Z. Abdul
Aris, A.
Umar, K.
Talib, J.
Madhavi, G.
author_sort Reddy, A. V. Bhaskar
title Relative efficiency comparison of carboxymethyl cellucose (CMC) stabilized Fe-0 and Fe-0/Ag nanoparticles for rapid degradation of chlorpyrifos in aqueous solutions
title_short Relative efficiency comparison of carboxymethyl cellucose (CMC) stabilized Fe-0 and Fe-0/Ag nanoparticles for rapid degradation of chlorpyrifos in aqueous solutions
title_full Relative efficiency comparison of carboxymethyl cellucose (CMC) stabilized Fe-0 and Fe-0/Ag nanoparticles for rapid degradation of chlorpyrifos in aqueous solutions
title_fullStr Relative efficiency comparison of carboxymethyl cellucose (CMC) stabilized Fe-0 and Fe-0/Ag nanoparticles for rapid degradation of chlorpyrifos in aqueous solutions
title_full_unstemmed Relative efficiency comparison of carboxymethyl cellucose (CMC) stabilized Fe-0 and Fe-0/Ag nanoparticles for rapid degradation of chlorpyrifos in aqueous solutions
title_sort relative efficiency comparison of carboxymethyl cellucose (cmc) stabilized fe-0 and fe-0/ag nanoparticles for rapid degradation of chlorpyrifos in aqueous solutions
publisher Inst Materials Physics
publishDate 2015
url http://eprints.utm.my/id/eprint/55257/
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