Citation: Qing-chuan Chen, Jie Wang, Kai-min Chen, Rui Zhang, Li Li, Xu-hong Guo. Heavy Metal Ions Removal by Nano-sized Spherical Polymer Brushes[J]. Chinese Journal of Polymer Science, ;2014, 32(4): 432-438. doi: 10.1007/s10118-014-1398-9 shu

Heavy Metal Ions Removal by Nano-sized Spherical Polymer Brushes

Qing-chuan Chen ¹ ,
Jie Wang ^1,, ,
Kai-min Chen ² ,
Rui Zhang ¹ ,
Li Li ¹ ,
Xu-hong Guo ¹

1.
State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
2.
Med-X Research Institute, Shanghai Jiao Tong University, Shanghai 200030, China

Corresponding author: Jie Wang, hexi@zju.edu.cn
Received Date: 1 July 2013
Revised Date: 31 July 2013

Fund Project: This work was financially by the National Natural Science Foundation of China (No. 21004021), the Fundamental Research Funds for the Central Universities and the High School Specialized Research Fund for the Doctoral Program (No. 20110074110003).

Nano-sized spherical polymer brushes (SPBs) consisting of both a polystyrene (PS) core and a brush shell of poly(acrylic acid) (PAA), poly(N-acrylcysteamine) (PSH), or poly(N-acrylcysteamine-co-acrylic acid) (P(SH-co-AA)), were prepared by photo-emulsion polymerization. The core-shell structure was observed by dynamic light scattering and transmission electron microscopy. Due to the strengthened Donnan effect, the PAA brush can adsorb heavy metal ions. Effects of the contact time, thickness of PAA brush and pH value on the adsorption results were investigated. Due to the coordination between the mercapto groups and heavy metal ions as well as the electrostatic interactions, SPBs with mercapto groups are capable to remove heavy metal ions selectively from aqueous solutions. The order of adsorption capacity of the heavy metal ions by SPBs with mercapto groups is: Hg2+ Au3+ Pb2+ Cu2+ Ni2+. The adsorbed heavy metal ions can be eluted from SPB by aqueous HCl solution, and the SPBs can be recovered. After three regenerations the recovered SPBs still maintain their adsorption capacity.
- Nano-sized spherical polymer brushes,
- Photo-emulsion polymerization,
- Heavy metal ions
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