黄原胶-丙烯酰胺接枝共聚物对Cr^(3+)的吸附性能  

Adsorption properties of graft copolymers of xanthan gum and acrylamide for Cr^(3+)

作　　者：程磊[1] 李仲谨[1] 王磊[1] 诸晓锋[1] 张超武[1] 

机构地区：[1]陕西科技大学化学与化工学院,教育部轻化工助剂化学与技术重点实验室,陕西西安710021

出　　处：《化工进展》2009年第12期2185-2188,共4页Chemical Industry and Engineering Progress

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

摘　　要：以黄原胶为原料,丙烯酰胺为接枝单体,采用微波辐射聚合得到了黄原胶-丙烯酰胺接枝共聚物(XG-g-AM),利用红外光谱仪、X射线衍射仪对其结构进行表征。研究了XG-g-AM对Cr3+的静态吸附行为,并根据吸附等温线研究了吸附热力学性质,结果表明:在研究的浓度范围内,XG-g-AM对Cr3+的吸附行为可用Freundlich等温式进行描述;吸附为自发的、吸热的熵增加过程,升高温度有利于吸附。The graft copolymers ofxanthan gum and acrylamide （XG-g-AM） were synthesized from xanthan gum by microwave irradiation with acrylamide as graft monomer, and the product was characterized by Fourier thransform infrared spectroscopy （FTIR） and X-ray diffraction （XRD）. The adsorption behavior of XG-g-AM for Cr3＋ was investigated, and the adsorption thermodynamics was studied according to adsorption isotherm. The adsorption behavior of XG-g-AM for Cr3＋ can be expressed by Freundlich adsorption isotherm equation in the temperature range of 298-318 K. The adsorption is a spontaneous and endothermic process with increased entropy, and the increase in temperature would benefit the adsorption.

关 键 词：黄原胶-丙烯酰胺接枝共聚物 吸附 CR3+ 热力学 

分 类 号：O636.1[理学—高分子化学]