1. Department of Chemical Engineering; Huaihai Institute of Technology; Lianyungang 222005 China
2. Jiangsu Hua Hai Cheng Ke Advanced Materials Co., Ltd.
3. Jiangsu Marine Resources Develepment Research Insititute; Lianyungang 222005 China
4. School of Chemistry and Chemical Engineering; Nanjing University; 22 Hankou Road Nanjing 210093 China