冬凌草吸附法分离富集溶液中的Pb^(2+)  

Study on the Separation of Pb^(2+) in the Aqueous Solution by Rabdosia Rubescens Adsorption Method

作　　者：左国强[1] 张晓杰[1] 宋欣宇 张露露 ZUO Guoqiang;ZHANG Xiaojie;SONG Xinyu;ZHANG Lulu(School of Materials Engineering,Jiyuan Vocational and Technical College,Jiyuan 459000,Henan)

机构地区：[1]济源职业技术学院材料工程学院,河南济源459000

出　　处：《济源职业技术学院学报》2022年第2期51-56,共6页Journal of Jiyuan Vocational and Technical College

基　　金：河南省科技发展计划项目(202102210259);济源市科技发展计划项目(20022008);济源职业技术学院2019年度青年骨干教师资助项目。

摘　　要：研究了冬凌草颗粒对溶液中微痕量Pb^(2+)的吸附性能和最佳去除条件,分析了体系酸度、温度、吸附时间、冬凌草用量和初始Pb^(2+)浓度对吸附率的影响。试验结果表明,室温下,控制吸附时间为30 min,溶液的pH=4~6,冬凌草颗粒对微痕量Pb^(2+)的吸附效果最佳,吸附容量可以达到83.58 mg/g。Langmuir模型能较好地描述冬凌草颗粒对Pb^(2+)的等温吸附过程,表明吸附以单层吸附为主。扫描电子显微镜、傅里叶变换红外光谱、比表面与孔隙度观察表明,冬凌草颗粒表面含有丰富的羟基和羧基等官能团,有利于Pb^(2+)的吸附。该法吸附速度快、吸附容量高,可应用于重金属离子废水的处理。The adsorption performance and optimal removal conditions of rabdosia rubescens granules for trace Pb^(2+) in solution are studied,and the effects of system acidity,temperature,adsorption time,amount of rabdosia rubescens and initial Pb^(2+) concentration on the adsorption rate are analyzed.The results show that under normal temperature,the adsorption time is controlled to be 30 min,the high ability of adsorption on rabdosia rubescens is found at PH 4~6.The maximum enrichment capacities of Pb^(2+) is 83.58 mg/g.The Langmuir model can describe the isotherm adsorption process of rabdosia rubescens granules to Pb^(2+) well,indicating that the adsorption is dominated by monolayer adsorption.SEM,BET and FTIR indicate that these rabdosia rubescens have rich functional groups such as carboxyl,hydroxyl on the surface,which is conducive to the adsorption of Pb^(2+).The method has fast adsorption speed and high adsorption capacity,and is expected to be applied to the treatment of heavy metal ions.

关 键 词：冬凌草 吸附 铅离子 

分 类 号：O652.6[理学—分析化学]