[Zhang, Siqin; Chen, Fang; Zhang, Kang; Ren, Zheng; Peng, Guowen] Univ South China, Sch Resources Environm & Safety Engn, Hengyang 421001, Hunan, Peoples R China.
[Fu, Xibiao] Univ South China, Sch Chem & Chem Engn, Hengyang 421001, Hunan, Peoples R China.
[Xiao, Fangzhu; Xiao, FZ] Univ South China, Sch Publ Hlth, Hengyang 421001, Hunan, Peoples R China.
[Peng, Guowen] Univ South China, Hunan Engn Res Ctr Safety Control & Recycling Rad, Hengyang 421001, Hunan, Peoples R China.