【摘要】 用铜离子交联果胶制得果胶铜凝胶球,用红外光谱和扫描电镜初步表征其结构,并研究果胶铜凝胶球对尿素的吸附性能。分别考察了果胶浓度、铜离子浓度、吸附时间、温度和尿素浓度对吸附的影响。结果表明:303K时,果胶铜凝胶球对尿素的吸附反应在7h时达平衡,当果胶浓度为2.5%,氯化铜浓度为2.0%,尿素浓度为400mg/L时,吸附量为48.63mg/g。吸附等温线符合Freundlich方程,温度过高和过低对吸附均不利。更多还原

【Abstract】 Pectin copper gel microsphere was synthesized by crosslinking pectin with copper ion,and characterized by means of Fourier transform infrared spectroscopy and scanning electron microscopy.The adsorption properties of pectin copper gel microsphere for urea was investigated.Several parameters including pectin concentration,copper ion concentration,adsorption time,temperature and urea concentration,which affected the adsorption properties,were studied.The results showed that the adsorption equilibrium could be established in about 7h,at 303 K.The adsorption capacity could achieved 48.63mg/g,when the concentration of urea was 400mg/L,the mass ratio of pectin was 2.5%,and the mass ratio of GuCl2 was 2.0%.It was found that Freundlich equation was applicable to the studied adsorption system.The higher and lower temperature was unfavorable for adsorption.更多还原