Weiguang Wang,a Hua Tian,a Gequn Shu,*a Dongxing Huo,a Fang Zhangb and Xiuping Zhu*c
a State Key Laboratory of Engines, Tianjin University, Tianjin, China
b School of Environment and State Key Joint Laboratory of Environment Simulation and Pollution Control, Tsinghua University, Beijing, China
c Department of Civil and Environmental Engineering, Louisiana State University, USA