不同条件下D113树脂分离富集Pb^(2+)的性能研究  

Separation and Enrichment of Lead Using D113 Resin at Various Conditions

作　　者：郑艺华[1] 冯守玲[1] 

机构地区：[1]青岛大学机电工程学院,山东青岛266071

出　　处：《青岛大学学报（工程技术版）》2017年第4期120-124,共5页Journal of Qingdao University(Engineering & Technology Edition)

基　　金：山东省自然科学基金(ZR2014EEM004);山东省重点研发计划项目(2015GSF117019)

摘　　要：为检测生物传感器分离富集Pb^(2+)的性能,本文基于重金属离子富集与检测一体化量热式生物传感器,采用大孔D113树脂颗粒进行吸附实验研究。以吸附率为指标,考察了树脂用量、吸附交换时间、温度、Pb^(2+)质量浓度和pH值等不同工况对树脂分离富集铅离子性能的影响。研究结果表明,D113树脂对Pb^(2+)的吸附率随树脂用量和吸附交换时间的增加而增大,温度、pH值和Pb^(2+)质量浓度的增加均有利于吸附交换过程。在树脂用量为4g,吸附交换时间为60min,吸附温度为30℃和pH值为7.0的离子强度条件下,吸附效果最优,实际测得D113树脂对茶叶中铅离子的吸附率达85%以上。说明D113树脂适用于铅离子检测目的生物传感器的分离富集处理过程,可作为重金属检测生物传感器的载体。该研究对提高量热式生物传感器灵敏度具有重要意义。In order to detect the separation and enrichment performance of heavy metal lead ion by biosensor, the macroporous D113 resin particles are used for adsorption experiments based on the heavy metal enrichment and detection integration of the thermal biosensor. The effects of different conditions such as resin dosage, ad-sorption time, temperature, Pb2＋ concentration and pH value on the separation and enrichment of lead were in-vestigated with the adsorption rate as an index. The results show that the adsorption rate of Pb2＋ on D113 resin increases with the increase of resin dosage and adsorption time. The increase of temperature, pH value and Pb2＋ concentration is beneficial to the adsorption process. The adsorption effect was best under the condition of 4 g resin dosage, 60 min adsorption exchange time, 30 °C adsorption temperature and pH 7. 0 . Under the opti-mal conditions, the adsorption rate of D113 resin to tea lead was above 85%. Experimental results show that D113 resin is suitable for the separation and enrichment process of biosensor for lead ion detection, and can be used as carrier for heavy metal detection biosensor. This study is of great significance to improve the sensitivity of calorimetry biosensors.

关 键 词：铅离子 D113树脂 重金属 富集 

分 类 号：O647.3[理学—物理化学] TP212[理学—化学]