Adsorption Mechanism of Composite Whisker on Copper Ions and Lead Ions |
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Authors: | LIU Juan XUE Wenjing BAO Yongchao CHENG Wanyi |
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Institution: | College of Environment and Safety Engineering, Qingdao University of Science and Technology, Qingdao 266042, P. R. China |
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Abstract: | A new kind of inorganic composite adsorbent based on chitin whiskers(CHW) and potassium tetratitanate whiskers(PTW) was synthesized via the thermal deposition to remove Cu2+ and Pb2+ from wastewater. CHW could be successfully coated on the surface of PTW when thermal treated 8 times. The adsorption process was better fitted with the Langmuir and Freundlich models. The adsorption process was more conformed to the Pseudo-second-order model. The results from XPS(X-ray photoelectron spectrum) further show that the adsorption mechanism between CHW-PTW and Cu2+, Pb2+ are both ion exchange and chemical adsorption. Thermodynamic parameters suggest that the adsorption processes are nonspontaneous. The adsorption of Cu2+ and Pb2+ is endothermic and exothermic, respectively. |
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Keywords: | Potassium tetratitanate whisker Chitin whisker Adsorption Mechanism |
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