In:
Water Science and Technology, IWA Publishing, Vol. 73, No. 5 ( 2016-03-4), p. 1211-1220
Abstract:
In the present study, a granular chitosan-Fe(III) complex was prepared as a feasible adsorbent for the removal of nitrate from an aqueous solution. There was no significant change in terms of nitrate removal efficiency over a wide pH range of 3–11. Nitrate adsorption on the chitosan-Fe(III) complex followed the Langmuir–Freundlich isotherm model. In order to more accurately reflect adsorption and desorption behaviors at the solid/solution interface, kinetic model I and kinetic model II were proposed to simulate the interfacial process in a batch system. Nitrate adsorption on the chitosan-Fe(III) complex followed the pseudo-first-order kinetic model and kinetic model I. The proposed half-time could provide useful information for optimizing process design. Adsorption and desorption rate constants obtained from kinetic model I and kinetic model II were beneficial to understanding the interfacial process and the extent of adsorption reaction. Kinetic model I and kinetic model II implied that nitrate uptake exponentially approaches a limiting value.
Type of Medium:
Online Resource
ISSN:
0273-1223
,
1996-9732
DOI:
10.2166/wst.2015.596
Language:
English
Publisher:
IWA Publishing
Publication Date:
2016
detail.hit.zdb_id:
764273-8
detail.hit.zdb_id:
2024780-1
SSG:
14
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