国家自然科学基金No.21177078;环保部公益项目No.201309009;山西省回国留学人员科研项目No.2013-012;教育部留学回国人员科研启动基金No.2013-192 Supported by the National Natural Science Foundation of ChinaNSFCNo.21177078,the Public Welfare Projects for Environmental Protection,China No.201309009,the Shanxi Scholarship Council of China No.2013-012 and the SRF for ROCS,State Education MinistrySEMNo.2013-192