Environmental Science Department;
College of Environment and Resources;
Jilin University;
Changchun 130012;
P. R. China;
Key Laboratory of Groundwater Resources and Environment;
Ministry of Education;
College of Environment and Resources;
Jilin University;
Changchun 130021;
P. R. China;
College of Environmental Science and Engineering of Tong/i University;
Shanghai 200092;
P. R. China;
Changchun Central Environmental Monitoring Station;
Changchun 130011;
P. R. China;