文献类型：期刊文献

英文题名：Kinetics and Thermodynamics of Paralytic Shellfish Poisoning Adsorption on Chitosan

作者：Xie, Wancui[1]; Liu, Xiaoli[1]; Yang, Xihong[1]; Bian, Zhongyuan[1]; Zhang, Chaohua[1];章超桦[2];

机构：Guangdong Ocean Univ, Guangdong Prov Key Lab Aquat Prod Proc & Safety, Key Lab Adv Proc Aquat Prod,Ctr Shellfish Proc Zh, Guangdong Higher Educ Inst,Natl Res & Dev Branch, Zhanjiang 524088, Peoples R China; Jiangnan Univ, State Key Lab Food Sci & Technol, Wuxi 214036, Peoples R China

年份：2013

卷号：7

期号：2

起止页码：233

外文期刊名：JOURNAL OF BIOBASED MATERIALS AND BIOENERGY

收录：CPCIS、SCI

语种：英文

外文关键词：Chitosan (CTS); Paralytic Shellfish Poisoning (PSP); Adsorption

外文摘要：Paralytic shellfish poisoning (PSP) of Alexandrium catenella was cultured in the laboratory, and the adsorption of PSP onto chitosan (CTS) was investigated. The optimum adsorption conditions were as follows: pH 3.5, contact time 90 min, temperature 40 degrees C, and volume of CTS 3.5 mL (2%). Kinetic data were tested using pseudo-first-order and pseudo-second-order kinetic models. The data correlated well with the pseudo-second-order kinetic model, indicating that chemical sorption was the rate-limiting step. The best interpretation for the thermodynamic experimental data was explained by the Freundlich isotherm model. Thermodynamic parameters, including Gibbs free energy (Delta G degrees), enthalpy (Delta H degrees), and entropy (Delta S degrees), were evaluated by applying the Van＇＇t Hoff quation. Results of Delta G degrees < 0, Delta H degrees > 0, and Delta S degrees > 0. Results indicated that adsorption was both feasible and spontaneous, and that endothermic adsorption can be processed in nature.