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Simultaneous adsorption of Cu2+ and Acid fuchsin (AF) from aqueous solutions by CMC/bentonite composite.

Abstract：

:Carboxymethyl-chitosan (CMC)/bentonite composite was prepared by the method of membrane-forming, and characterized by Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD) techniques. The simultaneous adsorption of Cu2+ and Acid fuchsin (AF) applying CMC/bentonite composite as an adsorbent in single or binary systems was investigated. The adsorption study was conducted systematically by varying the ratio of CMC to bentonite, adsorbent dosage, initial pH value, initial Cu2+ (or AF) concentration, contact time and the interaction of two components in binary solutions. The results showed that the presence of Cu2+ hindered the adsorption of AF, while the presence of AF almost had no influence on the adsorption of Cu2+ in binary systems. The adsorption data of Cu2+ and AF were both suitable for Langmuir isotherm model, and the maximum adsorption capacities of CMC/bentonite composite, according to the Langmuir isotherm model were 81.4 mg/g for Cu2+ and 253.2 mg/g for AF at 298 K. The pseudo-second-order model could better describe the adsorption process of Cu2+ and AF. Thermodynamic constant values illustrated that the adsorption of Cu2+ was endothermic, while the adsorption process of AF was exothermic.

journal_name

Int J Biol Macromol

journal_title

International journal of biological macromolecules

authors

Gong N,Liu Y,Huang R

doi

10.1016/j.ijbiomac.2018.04.075

subject

Has Abstract

pub_date

2018-08-01 00:00:00

pages

580-589

eissn

0141-8130

issn

1879-0003

pii

S0141-8130(17)34581-6

journal_volume

115

pub_type

杂志文章

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