海泡石/黄原胶接枝共聚物对Cu^(2+)吸附性能的研究　  

Study on adsorption characteristic of graft copolymer of sepiolite/xanthan gum for copper (Ⅱ) ion

作　　者：杨祥龙[1] 苏秀霞[1] 诸晓锋[1] 苗宗成[1] 郝明德[2] 李仲谨[1] 

机构地区：[1]教育部轻化工助剂化学与技术重点实验室,陕西科技大学,陕西西安710021 [2]中国科学院水利部水土保持研究所,陕西杨凌712100

出　　处：《食品工业科技》2010年第3期73-75,79,共4页Science and Technology of Food Industry

基　　金："十一五"国家科学技术支撑计划项目(2006BAD09B04);陕西省科技计划项目(2008K06-15);陕西科技大学研究生创新基金

摘　　要：以黄原胶(XG)、丙烯酸、丙烯酰胺为主要原料,过硫酸钾为引发剂,通过接枝共聚并复合海泡石制备接枝共聚物,利用红外光谱(FT-IR)对接枝产物进行表征。研究了共聚物对Cu2+的静态吸附行为及动力学特征,结果表明:在温度298.15K,pH为8.2,时间为40min,共聚物对Cu2+的吸附效果最佳。共聚物对Cu2+的吸附行为更加符合Langmiur吸附等温式,吸附过程符合准二级动力学方程。Acrylic Acid （AA）/Acrylamide（AM） were graft polymerized onto the xanthan gum （XG） with sepiolite, initiated with potassium persulfate.The copolymer structure was characterized by means of Fourier-transform infrared spectroscopy（FT-IR） .Adsorption behavior and Dynamic Characteristics of copolymer for Cu^2＋ were investigated.The results showed that that maximum adsorption capacity, at normal temperature, under the optimal condition for copolymer adsorbing Cu^2＋ that the pH was 8.2, the adsorption time was 40min.The adsorption behavior was adapted to Langmiur adsorption isotherm equation.The process of copolymer adsorbing Cu^2＋ conformed to the pseudo--second-order kinetic model.

关 键 词：黄原胶 共聚物 吸附 动力学 海泡石 

分 类 号：TS201.2[轻工技术与工程—食品科学]