Detection of heavy metals in industrial wastewater based on QCM
The detection of zinc ion(Zn2+)involves many aspects of human safety issues,such as food,water and soil environment,human pathology,and attracts more and more attention from domestic and foreign scholars. In order to conveniently and accurately detect whether the Zn2+ in discharged sewage reach the standard,a heavy metal sensor is prepared by coating an ion exchange resin film containing ether bond which can specifically adsorb Zn2+ on the electrode of quartz crystal microbalance(QCM). By measuring the resonance frequency shift of QCM, the selection characteristics,detection precision,detection response time and repeatability of the sensor are studied. The experimental results show that the frequency of the prepared quartz crystal sensor coated with ether bond resin film changes obviously with the content of Zn2+,the detection accuracy is about 95 ％,and the detection can be repeated for many times,and the detection time is moderate. The research results of this sensor have potential application prospects in the actual detection of heavy metals.
quartz crystal microbalance (QCM )zinc ion (Zn2+)ether bond-containing ion exchange resinsensor
万方数据
维普
