Q. Huang (*) · Q.Wang · L. Dong · B. Xi · B. Zhou
Chinese Research Academy of Environmental Sciences (CRAES),
Anwai, Dayangfang 8#, Beijing 100012, China
Tel. +86-10-84915142; Fax +86-10-84913903
e-mail: huangqf@vip.sina.com
Q.Wang
Faculty of Engineering, Fukuoka University, Fukuoka, Japan