国家自然科学青年基金21307002;国家自然科学基金21477057;环境污染过程与基准教育部重点实验室开放课题基金KL-PPEC-2013-05资助.Supported by the National Natural Science Foundation of China 21307002,21477057,Key Laboratory of Pollution Processes and Environmental CriteriaNankai University,Ministry of Education KL-PPEC-2013-05.