NDLI: Investigation of adsorption capacity of N-carboxymethyl chitosan for Pb(II) ions.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Wang, Chongxia Song, Qingping Gao, Jiangang
Description	Author Affiliation: Wang C ( School of Biochemical and Engineering, Anhui Polytechnic University, Wuhu, 241000, China E-mail: gaojiangang@ahpu.edu.cn.)
Abstract	N-carboxymethyl chitosan (NCMC) was prepared by reacting chitosan (CTS) with chloroacetic acid and characterized by (13)C-NMR spectroscopy to confirm that carboxymethylation occurred only in the amino groups. The adsorption properties of CTS, NCMC and O-carboxymethyl chitosan (OCMC) towards Pb(II) ions were evaluated and the order of the adsorption capacity was as follows: NCMC > OCMC > CTS. The effects of initial pH value (2.0-5.5) of the solutions and contact time (5-120 min) on adsorption of Pb(II) were investigated and the kinetic data were evaluated using the pseudo-first-order and pseudo-second-order models. Kinetics study showed that the adsorption process followed second-order kinetics rather than the first-order one. Furthermore, the experimental equilibrium data of Pb(II) on the NCMC were analyzed using the Langmuir and Freundlich isotherm models and the results indicated that the Langmuir model gave a better fit than the Freundlich equation and the maximum adsorption capacity obtained from the Langmuir model was 421.9 mg g(-1).
File Format	HTM / HTML
ISSN	02731223
Issue Number	8
Volume Number	68
e-ISSN	19969732
Journal	Water Science & Technology
Language	English
Publisher	IWA Publishing
Publisher Date	2013-01-01
Publisher Place	Great Britain (UK)
Access Restriction	Subscribed
Subject Keyword	Discipline Hydrology Chitosan Chemistry Lead Adsorption Analogs & Derivatives Chemical Synthesis Hydrogen-ion Concentration Kinetics Magnetic Resonance Spectroscopy Thermodynamics Water Pollutants, Chemical Journal Article Research Support, Non-u.s. Gov't
Content Type	Text
Resource Type	Article
Subject	Environmental Engineering Water Science and Technology

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