Pectin/poly(acrylamide-co-acrylamidoglycolic acid) pH sensitive semi-IPN hydrogels: selective removal of Cu2+ and Ni2+, modeling, and kinetic studies

被引：29

作者：

Reddy, N. Sivagangi ^{[1
]}

Rao, K. Madhusudana ^{[2
]}

Vani, T. J. Sudha ^{[1
]}

Rao, K. S. V. Krishna ^{[1
]}

Lee, Yong Ill ^{[3
]}

机构：

[1] Yogi Vemana Univ, Dept Chem, Kadapa 516003, India

[2] Pusan Natl Univ, Dept Polymer Sci & Engn, Busan, South Korea

[3] Changwon Natl Univ, Dept Chem, Chang Won, South Korea

来源：

DESALINATION AND WATER TREATMENT | 2016年 / 57卷 / 14期

关键词：

Hydrogels; Semi-IPNs; Pectin; Metal ion; Copper; Nickel; HEAVY-METAL IONS; AQUEOUS-SOLUTIONS; CHITOSAN; ADSORPTION; WATER; PRECIPITATION; SEPARATION; COMPLEXES; NETWORKS; CAPACITY;

D O I：

10.1080/19443994.2015.1008053

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

In this study, we have developed pH sensitive potential semi-IPN hydrogels which are composed from pectin, acrylamide, acrylamidoglycolic acid using N,N'-methylene-bis-acrylamide as a cross-linker. The formation and morphology of semi-IPNs were confirmed by FTIR and SEM studies. Swelling and metal ion uptake studies of the semi-IPN hydrogels were performed for Cu2+ and Ni2+ ions. Competitive adsorption studies were also carried out for Cu2+, Co2+, and Ni2+. Further the kinetics data were fitted with pseudo-first and pseudo-second-order kinetic models to investigate the adsorption mechanism. The equilibrium data were interpreted by the Langmuir, Freundlich, and Temkin models. The maximum adsorption capacity of semi-IPN hydrogels calculated from the Langmuir model was found to be 203.7 and 121.7mgg(-1) for Cu2+ and Ni2+ ions, respectively. The adsorption process is described by a pseudo-second-order kinetic model.

引用

页码：6503 / 6514

页数：12

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