NDLI: Removal of 2,4-D from aqueous solutions by adsorption processes, using biopolymer, chitin and chitosan

Content Provider	IEEE Xplore Digital Library
Author	El Gaini, L. Daoudi, E. El Harmmoudi, H. Tolaimate, A. Rhazi, M. Bakasse, M.
Copyright Year	2009
Description	Author affiliation: Faculty of Science, University Chouaib Doukkali, 24000, El Jadida, Morocco (El Gaini, L.; Daoudi, E.; El Harmmoudi, H.; Bakasse, M.) \|\| Electrical Engineering Department, Iran University of Science and Technology, Tehran, 16844, Iran (Tolaimate, A.; Rhazi, M.)
Abstract	Chitin, extracted primarily from exoskeleton shellfish, is one of the most abundant biopolymer in the world. It is estimated to be produced annually almost as much as cellulose. The development of fishing activities in Morocco (coastline of 3500 km on both the Atlantic and the Mediterranean) induced an important fish industry waste. The aim of this work is to recover chitin, extracted from shellfish waste, and chitosan, produced by deacetylation of chitin, in the adsorption of organic pesticide 2,4-dichlorophenoxyacetate (2,4-D). The chitosan samples were prepared from α-chitin from crustacean shells and β-chitin from squid pens. The chitin deacetylation was carried out according to two methods using, respectively, as alkaline agent, the aqueous sodium hydroxide solution and anhydrous potassium hydroxide. The role of the source and of the process on the N-deacetylation reactions is confirmed. Characterization of chitin and chitosan was performed by infrared spectroscopy and nuclear magnetic resonance. The adsorption of 2,4-D by chitin and chitosan was performed at different pH values, the pesticide-adsorbent contact time and initial pesticide concentration. The adsorption is described by Langmuir-type isotherm and Freundlich-type isotherm. Recovery tests of 2,4-D confirm the initial interest in using chitin and chitosan as a depolluting agent.
Starting Page	1
Ending Page	1
File Size	113094
Page Count	1
File Format	PDF
ISBN	9781424457458
e-ISBN	9781424457465
DOI	10.1109/ICTONMW.2009.5385621
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-12-10
Publisher Place	France
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	chitosan adsorption Exoskeletons pesticide Infrared spectra 2,4-dichlorophenoxyacetate chitin environment biopolymer Nuclear magnetic resonance depollution Marine animals Testing
Content Type	Text
Resource Type	Article

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