轻烧菱镁矿吸附锌离子的试验研究  

Experimental Research on Zinc Ion Adsorption by Light-calcined Magnesite

作　　者：程慧凯[1] 徐盛明[1] 徐景明[1] 张清[2] 

机构地区：[1]清华大学核能与新能源技术研究院 [2]清华大学

出　　处：《金属矿山》2004年第11期25-29,共5页Metal Mine

基　　金：国家自然科学基金 (编号 :5 0 0 740 2 0 ;5 0 2 740 45 );清华大学核能与新能源技术研究院基础研究基金 ( 2 0 0 2 -0 3 );清华大学骨干人才基金资助

摘　　要：为了经济地脱除低浓度废水中的重金属离子 ,对轻烧菱镁矿吸附锌离子的工艺及吸附机理进行了研究。主要研究了溶液温度、pH值、吸附时间、轻烧菱镁矿粒径以及搅拌速度对吸附率的影响 ,并对吸附过程的热力学和动力学进行了研究。试验结果表明 ,轻烧菱镁矿是一种有良好应用前景的锌离子吸附剂 ,其吸附过程属于一级反应动力学过程 。In order to economically remove the heavy metal ions from dilute wastewater,the process and mechanism of light calcined magnesite's adsorption of zinc ion were investigated, mainly including the effect of solution temperature, pH value, adsorption time, particle size of light- calcined magnestie and agitation speed on the adsorption rate. The thermodynamics and kinetics of the adsorption process were also studied. The results showed that light- calcined magnesite is a promising zinc ion adsorbent and the adsorption process followed the first order kinetic one while its equilbrium isotherm was not consistent with Freundlich isothermal equation.

关 键 词：吸附机理 工艺技术 锌离子 轻烧菱铁矿 吸附动力学 吸附热力学 

分 类 号：O647.316[理学—物理化学]