土壤中重金属有效态汞的快速检测  

Quick detection of heavy metal absorbable mercury in soil

作　　者：张肖静[1] 陈涛[1] 傅浩强[1] 

机构地区：[1]郑州轻工业学院材料与化学工程学院/中国轻工业环境污染治理与资源化重点实验室,河南郑州450001

出　　处：《轻工学报》2018年第1期49-55,共7页Journal of Light Industry

基　　金：国家自然科学基金项目(41701569);科研基地建设--河南省环境污染治理与生态修复协同创新中心项目

摘　　要：分别采用DTPA,EDTA和HCl 3种提取剂对土壤中的重金属有效态汞进行提取,选择提取率最高的作为提取剂.另外,制备了空心碳球/聚苯胺复合材料,将该复合材料制成DNA修饰的空心碳球/聚苯胺电化学传感器,并对土壤中的有效态汞进行检测.结果表明,3种提取剂中,DTPA对土壤中有效态汞的提取率最高,为20%~31%;该化学传感器能够准确、灵敏地检测土壤中的有效态汞含量,与采用原子荧光法的测定结果相比,两个实际样品的相对误差分别为2.32%和2.71%.DTPA,EDTA and HCl extractants were used to extract heavy metal absorbable mercury in the soil,by comparison,the highest extraction rate of the extractant DTPA was chosen. Then,the hollow carbon nanospheres/polyaniline composite was prepared. The composite was made into a DNA-modified hollow carbon nanospheres/polyaniline electrochemical sensor and the absorbable mercury in the soil was detected. The results showed that DTPA had the highest extraction rate of absorbable mercury in the soil from 20% to 31%.And the chemical sensor could detect the absorbable mercury content in soil accurately and sensitively. Compared with the results of atomic fluorescence spectrometry,the relative errors between the two actual samples were 2. 32% and 2. 71%,respectively.

关 键 词：土壤重金属污染 有效态汞 重金属检测 空心碳球/聚苯胺 电化学传感器 

分 类 号：TS97[轻工技术与工程]