1. College of Environmental and Chemical EngineeringYanshan UniversityHebei Key Laboratory of Applied ChemistryHebei Key Laboratory of heavy metal deep-remediation in water and resource reuse Qinhuangdao 066004 P. R. China
2. School of Information Science and EngineeringYanshan UniversityKey Laboratory for Special Fibre and Fibre Sensor of Hebei Province Qinhuangdao 066004 P. R. China
3. Changchun Institute of Applied ChemistryChinese Academy of SciencesNational Analytical Research Centre of Electrochemical and Spectroscopy Changchun 130022 P. R. China