国家自然科学基金No.51308078;江苏省自然科学基金No.BK20130252;国家水体污染控制与治理科技重大专项No.2012ZX07301-001;Supported by the Naitonal Natural Science Foundation of ChinaNo.51308078,the Natural Science Foundation of Jiangsu Province No.BK20130252and the National Major Science and Technology Program for Water Body Pollution Control and TreatmentNo.2012ZX07301-001