浙江省教育厅项目Y201120673;浙江农林大学发展基金预研项目2010FK042;国家水体污染控制与治理科技重大专项2008ZX07101-006-02-05;the Program of Education Department of Zhejiang ProvinceY201120673;the Advanced Research Project of Zhejiang A & F University2010FK042;the National Key Science and Technology Special Project of Water Body Pollution Control and Management2008ZX07101-006-02-05