7Kamra Anjana, Anubha Kaushik, Bala Kiran, et al. Biosorption of Cr( Ⅵ ) by immobilized biomass of two indigenous strains of cyanobacteria isolated from metal contaminated soil[J]. Journal of Hazardous Materials, 2007, 148 (1/2): 383-386.
8Ansari M I, Malik A. Biosorption of nickel and cadmium by metal resistant bacterial isolates from agricultural soil irrigated with industrial wastewater [J] . Bioresour, Technol, 2007, 98(16): 3149-3153.
9Aldre Jorge Morals Barros , Shiva Prasad Valderi Duarte Leite, Antonio Gouveia Souza. Biosorption of heavy metals in upflow sludge columns [J].Bioresource Technology, 2007, 98(7): 1418-1425.