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Open AccessArticle

Uptake of Pb(II) Ions from Simulated Aqueous Solution via Nanochitosan

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Department of Chemical Engineering, Faculty of Chemical Engineering, Tarbiat Modares University, Tehran 14115-114, Iran
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Department of Polymer Engineering and Color Technology, Amirkabir University of Technology, 424 Hafez Ave, Tehran 15875-4413, Iran
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Department of Mechanical Engineering, Center for Nanofibers and Nanotechnology, Faculty of Engineering, National University of Singapore, Singapore 117576, Singapore
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Faculty of Chemical Engineering, Babol Noshirvani University of Technology, Shariati Avenue, Babol 47148-71167, Iran
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Chemical Engineering Department, Ayatollah Amoli Branch, Islamic Azad University, Amol 14778-93855, Iran
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Department of Environmental Science, Faculty of Natural Resources, Tarbiat Modares University, Noor 46414-356, Iran
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Authors to whom correspondence should be addressed.
Coatings 2019, 9(12), 862; https://doi.org/10.3390/coatings9120862
Received: 10 November 2019 / Revised: 11 December 2019 / Accepted: 12 December 2019 / Published: 15 December 2019
(This article belongs to the Special Issue Recent Advances in Bioactive Coatings)
In this work, nanochitosan (NC) was prepared through ionic gelation using low molecular weight chitosan and maleic acid (MA). The synthesized NC was characterized by atomic force microscopy (AFM), Fourier transform infrared spectroscopy (FTIR), and scanning electron microscopy (SEM). During preparation, the particle size of the material depended on parameters such as concentration of chitosan and pH of the aqueous solution. After controlling the mentioned parameters, NC smaller than 100 nm was prepared. The chitosan and prepared NC were employed for the adsorption of Pb(II) from an aqueous solution in the form of a batch system. Among the sorption parameters, pH showed the strongest effect on the sorption process and removal of the maximum number of Pb(II) ions was obtained at pH value of 6. Pseudo-first-order and pseudo-second-order models were used to track the kinetics of the adsorption process. Langmuir and Freundlich’s isotherms were subjected to the absorption data to evaluate absorption capacity. NC proved to be an excellent adsorbent with a remarkable capacity to eliminate Pb(II) ions from aqueous solutions at multiple concentrations. The NC also showed better performance with a comparatively easier preparation process than in other reported work. View Full-Text
Keywords: adsorption; chitosan; isotherm; nanochitosan; Pb(II) ion removal adsorption; chitosan; isotherm; nanochitosan; Pb(II) ion removal
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Zareie, C.; Kholghi Eshkalak, S.; Najafpour Darzi, G.; Sharifzadeh Baei, M.; Younesi, H.; Ramakrishna, S. Uptake of Pb(II) Ions from Simulated Aqueous Solution via Nanochitosan. Coatings 2019, 9, 862.

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