1 School of Chemical and Environmental Engineering, China University of Mining and Technology Beijing 100083 P. R. China.
2 Key Laboratory of Environmental Nano-Technology and Health Effect, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences Beijing 100085 P. R. China jingzhang@rcees.ac.cn.
3 Department of Environmental Engineering, North China Institute of Science and Technology Beijing 101601 P. R. China northinstitute@yeah.net.
4 National Engineering Laboratory for VOCs Pollution Control Materials & Technology, University of Chinese Academy of Sciences Beijing 101408 P. R. China.