1. Adsorption of Lead Ion Using Polymer-Modified Wheat Straw Carboxymethylcellulose.
- Author
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He, Wen-Juan, He, Yu-Feng, Yan, De-Zhen, Wang, Ying, and Wang, Rong-Min
- Subjects
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LEAD , *METAL ion absorption & adsorption , *WHEAT straw , *CARBOXYMETHYLCELLULOSE , *BIOPOLYMERS , *POLYMERIC composites , *FOURIER transform infrared spectroscopy - Abstract
The wheat straw carboxymethylcellulose (WSC), a typical natural polymer, was modified by functional poly(acrylic acid) (PAA) with in situ polymerization, which afforded natural and synthetic polymer composite (WSC/PAA). The polymer (WSC/PAA) was characterized by Fourier transform infrared spectroscopy, scanning electron microscopy, and thermogravimetric analysis techniques. WSC/PAA was used as polymer adsorbent for removing Pb(II) ions in wastewater. The removal rate of 99.8% was obtained when the experimental conditions were chosen as follows: initial Pb(II) ion concentration; 600 mg/L, WSC/PAA concentration; 0.1 g/100 mL, pH; 5.0, contact time; 60 minutes at 20°C. Adsorption dynamics were consistent with pseudo-second-order kinetic model and the isotherm model can meet the Langmuir isotherm. [ABSTRACT FROM AUTHOR]
- Published
- 2014
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