沸石改性聚丙烯酰胺复合材料对铜的吸附性能研究

The Adsorption Property of Zeolite Modification Polyacrylamide Composites for Cu^(2+)

重金属污染是严峻的问题,其难以被生物降解,会进入动植物体,传播至生态系统,最终危及人类健康。因此,必须对重金属离子进行测定,但由于重金属离子的含量低并受基质效应影响,需要先将其分离和富集。固相萃取是一种简单、成本低、环保的方法。本论文合成了沸石改性聚丙烯酰胺复合材料,将其作为铜分离富集材料,结合火焰原子分光光度计,对铜进行了测定;为了得到最佳的吸附性能,优化了固相萃取条件,包括pH值和吸附时间;研究了沸石改性聚丙烯酰胺复合材料在吸附铜过程中的动力学、等温线和热力学模型。

The pollution of heavy metal is a severe problem,as it is difficult to biodegrede which can enter the bodies of animals and plants,spread into different levels of the ecological system,and ultimately endangering human health.Therefore,it is required to determine the content of heavy metal ions.However,due to the low concentration and matrix effects,it is necessary to separate and enrich heavy metal ion before the detection.Solid-phase extraction is a simple,low-cost,and environmentally friendly method.In this study,the zeolite-modified polyacrylamide composite was synthessized as the separation and enrichment material,combined with flame atomic absorption spectroscopy,for the detection of Cu^(2+).The influencing factors of the Solid-phase extraction conditions were optimized,including the value of pH and adsorption time.The kinetics,thermodynamics,and adsorption isotherms of the zeolite modification polyacrylamide composites for the adsorphion of Cu^(2+)were studied.