5Nahum A M C, Roberto LR, et al. Adsorption of fluoride from water solution on bone char[J].Industrial & Engineering Chemistry Research,2007,46(26):9205 -9212.
6Mjengera H, Mkongo G. Approprioate deflouridation technology for use in flourotic areas in Tanzania [J].Physics and Chemistry of the Earth,2003,28:1097-1104.
7Srimurali M, Pragathi A, Karthikcyan J. A Study on removal of fluorides drinking water by adsorption onto low-cost materials[J]. Environmental Pollution, 1998,99:285-289.
