9Aleksey N V, Leonid V G, Vladimir V T, et al. Adsorption of heavy metal cations by organic ligands grafted on porous materials. Microporous Mesoporous Mater, 2009, 118:251 -257.
10Ahluwalia S S, Goyal D. Microbial and plant derived biomass for removal of heavy metals from wastewater. Bioresour Technol, 2007, 98(12) : 2 243 -2 257.
7Cabeza Luisa F, Clauson Sandra M, Tay- lor Maryann M, et al. The effect of surfac- tant on the isolation of protein products from chromium - containing solid tannery waste : influence on the process and on the chemical and physical properties of the resultant gelatin. JALCA, 1999,94 : 190 - 198.
