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Adsorptive removal of Congo red from aqueous solutions using crosslinked chitosan and crosslinked chitosan immobilized bentonite.

Abstract：

:Batch experiments were executed to investigate the removal of Congo red (CR) from aqueous solutions using the crosslinked chitosan (CCS) and crosslinked chitosan immobilized bentonite (CCS/BT composite). The CCS and CCS/BT composite were characterized by X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR) techniques. The removal of CR was examined as a function of pH value of CR solution, contact time, and inorganic sodium salt and ionic strength. The equilibrium data of CCS and CCS/BT composite agreed well with the Langmuir model. The adsorption capacities of CCS and CCS/BT composite at 298K and natural pH value were 405 and 500 mg/g, respectively. The kinetic data correlated well with the pseudo-second-order model. The adsorption of CR onto the CCS was mainly controlled by chemisorption while the adsorption of CR onto the CCS/BT composite was controlled by chemisorption and the electrostatic attraction.

journal_name

Int J Biol Macromol

journal_title

International journal of biological macromolecules

authors

Huang R,Zhang L,Hu P,Wang J

doi

10.1016/j.ijbiomac.2016.01.083

subject

Has Abstract

pub_date

2016-05-01 00:00:00

pages

496-504

eissn

0141-8130

issn

1879-0003

pii

S0141-8130(16)30084-8

journal_volume

86

pub_type

杂志文章

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