Adsorption capacity of superabsorbent resin composite enhanced by non-thermal plasma and its adsorption kinetics and isotherms to lead ion in water

The 2-acrylamido-2-methyl propanesulfonic acid (AMPS)/acrylamide (AM) superabsorbent was modified by non-thermal plasma (NTP) under ambient temperature and pressure conditions. The results showed that NTP treatment can improve the adsorption property of superabsorbent obviously. After superabsorbent...

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Bibliographic Details
Published inJournal of environmental chemical engineering Vol. 1; no. 4; pp. 996 - 1003
Main Authors Li, Qiurong, Lu, Hongxiao, Xiao, Haiyan, Gao, Kaisha, Diao, Mengmeng
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 01.12.2013
Subjects
Adsorption isotherm
Kinetics
Non-thermal plasma
Pb2
Superabsorbent polymer
Superabsorbent polymer
Pb2
Non-thermal plasma
Kinetics
Adsorption isotherm
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Summary:The 2-acrylamido-2-methyl propanesulfonic acid (AMPS)/acrylamide (AM) superabsorbent was modified by non-thermal plasma (NTP) under ambient temperature and pressure conditions. The results showed that NTP treatment can improve the adsorption property of superabsorbent obviously. After superabsorbent resin composite treated by NTP, the ΔSθ increased from 25.18J/molK to 47.01J/molK, the Ea decreased from 18.56kJ/mol to 13.96kJ/mol and the ΔGθ (25°C) decreased from −1.994kJ/mol to −2.447kJ/mol. It indicated that the adsorption properties were enhanced and activation energy decreased by NTP treatment, which was due to available adsorption sites increased. The kinetic data of adsorption were found to best fit to the pseudo-second-order, while the equilibrium data were found to be well described by Freundlich model.
ISSN:2213-3437
2213-3437
DOI:10.1016/j.jece.2013.08.010