[1
]School of Environmental Science and Engineering, Tianjin Key Laboratory of Biomass/Wastes
Utilization, Tianjin University, Tianjin 300350, P.R. China
[2
]School of Science, Tibet University, Lhasa 850000, P.R. China
[3
]School of Agriculture, Sun Yat-sen University, Guangzhou, Guangdong 510275, P.R. China
[4
]School of Environmental and Municipal Engineering, Tianjin Chengjian University, Tianjin
300384, P.R. China