内蒙古自治区科技计划项目No.20130427;国家自然科学基金No.51169018,51369021;国家水体污染控制与治理科技重大专项No.2014ZX07503-004-02Supported by the Science and Technology Planning Project of Inner Mongolia Autonomous Region of ChinaNo.20130427,the National Natural Science Foundation of ChinaNo.51169018,51369021 and the National Major Science and Technology Special Project of Water Pollution Control and Governance No.2014ZX07503-004-02