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 b...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.展开更多
基金Supported by the National Natural Science Foundation of China（No.51308314）.
文摘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.
