Adsorption of Lead Ion Using Polymer-Modified Wheat Straw Carboxymethylcellulose |
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| Authors: | Wen-Juan He Yu-Feng He De-Zhen Yan Ying Wang |
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| Institution: | Key Laboratory of Eco-Environment-Related Polymer Materials of Ministry of Education, Key Laboratory of Polymer Materials of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University , Lanzhou , P. R. China |
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| 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. |
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| Keywords: | Adsorption dynamics composite polymer adsorbent polymer-modified carboxymethylcellulose removing Pb(II) ions |
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