摘要
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.
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.
基金
Supported by the National Natural Science Foundation of China（No.51308314）.
