Iqbal et al. 2005 reported the Novel method for immobilization of biosorbent by using structural fibrous network of papaya wood. Their finding showed that low cost structural fibrous network (SFN) as bio matrix was use for entrapment of any microbial biomass. Outcome of this study show that SFN has no detrimental effect both on growth and bioactivity of fungi. They also revealed structural fibrous network application in organic acid.Akhtar  et al. 2008 explained the loofa sponge immobilized biomass for removal of Cr(III). Biosorption characteristics of unicellular green alga Chlorella sorokiniana immobilized in loofa sponge for removal of heavy metal. Results show the maximum increase in biosorption capacity when the microalgal biomass was immobilized onto loofa sponge. Kinetic study was well explained by pseudo second order. Equilibrium data showed well defined   by langumir isotherm model. This study relieved the low cost immobilized biomass could be use as an effective biosorbent for the removal of heavy metal.Congeevaram et al. 2007 In this study, heavy metal resistant fungi and bacteria were isolated from the soil samples of an electroplating industry, and the bioaccumulations of Cr(VI) and Ni(II) by these isolates were characterized to evaluate their applicability for heavy metal removal from industrial wastewaters. Result indicates the applicability of the isolated Micrococcus sp. and Aspergillus sp. for the removal of chromium and nickel from industrial wastewater.Reference:1. Iqbal M. and Saeed A. 2005. Novel method for cell immobilization and its application for production of organic acid, Applied Microbiology, 40(3): 178–182.2. Akhtar N., M. Iqbal,  S.I. Zafar and J. Iqbal 2008. biosorption characteristics of unicellular green alga Chlorella sorokiniana immobilized in loofa sponge for removal of Cr(III), Jourual of Environmental Science,20(2): 231-2393. Congeevaram S., Dhanarani S., Park J., Dexilin M., Thamaraiselvi K. 2007. Biosorption of chromium and nickel by heavy metal resistant fungal and bacterial isolates, Journal of hazard material,146: 270- 277