* Corresponding authors

^a State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, P. R. China
E-mail: baishunwen@hit.edu.cn, qiushan@hit.edu.cn

^b School of Environmental Ecology and Biological Engineering, School of Chemistry and Environmental Engineering, Key Laboratory of Green Chemical Engineering Process of Ministry of Education, Wuhan Institute of Technology, Wuhan, Hubei, P. R. China
E-mail: 027wi@163.com

^c Department of Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan

^d Centre for Water Research, Department of Civil and Environmental Engineering, National University of Singapore, 1 Engineering Dr 2, Singapore, Singapore