化工进展

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黄原胶-丙烯酰胺接枝共聚物对Cr3+的吸附性能

程 磊,李仲谨,王 磊,诸晓锋,张超武   

  • 出版日期:2009-12-05 发布日期:2009-12-05

Adsorption properties of graft copolymers of xanthan gum and acrylamide for Cr3+

CHENG Lei,LI Zhongjin,WANG Lei,ZHU Xiaofeng,ZHANG Chaowu   

  • Online:2009-12-05 Published:2009-12-05

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-AMCr3+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-AMCr3+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。

Abstract: The graft copolymers of xanthan gum and acrylamide XG-g-AM were synthesized from xanthan gum by microwave irradiation with acrylamide as graft monomerand 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 investigatedand 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 298318 K. The adsorption is a spontaneous and endothermic process with increased entropyand the increase in temperature would benefit the adsorption.

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