A biosorbent prepared by alkaline extraction of Aspergillus niger biomass was evaluated for its potential to remove mercury species – inorganic (Hg2+) and methyl mercury (CH3Hg+) – from aqueous solutions. Batch experiments were carried out to determine the pH and time profile of sorption for both species in the pH range 2–7. The Hg2+ exhibited more rapid sorption and higher capacity than the CH3Hg+. Further, removal of both mercury species from spiked ground water samples was efficient and not influenced by other ions. Sorption studies with esterified biosorbent indicated loss of binding of both mercury species (>80%), which was regained when the ester groups were removed by alkaline hydrolysis, suggesting the involvement of carboxyl groups in binding. Further, no interconversion of sorbed species occurred on the biomass. The biosorbent was reusable up to six cycles without serious loss of binding capacity. Our results suggest that the biosorbent from Aspergillus niger can be used for removal of mercury and methyl mercury ions from polluted aqueous effluents.
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Akthar, N. & Mohan, P.M. 1995 Bioremediation of toxic metal ions from polluted lake waters and industrial effluents by fungal biosorbent. Current Science 69, 1028–1030.
Akthar, N., Sastry, K.S. & Mohan, P.M. 1995 Biosorption of silver ions by processed Aspergillus niger biomass. Biotechnology Letters 17, 551–556.
Akthar, N., Sastry, K.S. & Mohan, P.M. 1996 Mechanism of metal biosorption by fungal biomass. Biometals 9, 21–28.
Chang, J.S. & Law, W.S. 1998 Development of microbial mercury detoxification processes using mercury-hyperresistant strain of Pseudomonas aeroginosa PU21. Biotechnology and Bioengineering 57, 462–470.
Chen, S., Kim, E., Shuler, M.L. & Wilson, D.B. 1998 Hg2+ removal by genetically engineered Escherischia coli in a hollow fiber bioreactor. Biotechnology Progress 14, 667–671.
Clarkson, T.W. 1997 The toxicology of mercury Critical Reviews in Toxicology 34, 369–403.
Fischer, G., Spyridon, R. & Franco, B. 1995 Bioaccumulation of methyl mercury and transformation of inorganic mercury by macrofungi. Environmental Science and Technology 29, 993–999.
Grandjean, P. & White, R.F. 1999 Methyl mercury neurotoxicity in Amazonian children downstream from gold mining. Environmental Health Perspectives 107, 587–591.
Gupta, R., Ahuja, P., Khan, S., Saxena, R.K. & Mohapatra, H. 2000 Microbial biosorbents: meeting challenges of heavy metal pollution in aqueous solutions. Current Science 78, 967–973.
Karna, R.R., Sajani, L.S. & Mohan, P.M. 1996 Bioaccumulation and Biosorption of Co2+ by Neurospora crassa. Biotechnology Letters 18, 1205–1208.
Karna, R.R., Uma, L., Subramanian, G. & Mohan, P.M. 1999 Biosorption of toxic metal ions by alkali-extracted biomass of a marine cyanobacterium, Phormidium valderianum BDU 30501. World Journal of Microbiology and Biotechnology 15, 729–732.
Kumar, C.S., Sastry, K.S. & Mohan, P.M. 1992 Use of wild type and nickel resistant Neurospora crassa for the removal of Ni2+ from aqueous medium. Biotechnology Letters 14, 1099–1102.
Kungoros, A., Aoyama, I., Muramoto, S. 2000 Toxicity of organic and inorganic mercury to Saccharomyces cerevisiae. Fresenius, Journal of Analytical Chemistry 368, 471–474.
Madrid, Y., Cabrera, C., Perez-Corona, T. & Camara, C. 1995 Speciation of methyl mercury and Hg(II) using baker's yeast biomass (Saccharomyces cerevisiae). Determination by continuous flow mercury cold vapor generation atomic absorption spectrometry. Analytical Chemistry 67, 750–754.
Nierenberh, D.W. & Nordgren, R.E. 1998 Delayed cerebellar disease and death after accidental exposure to dimethylmercury. New English Journal of Medicine 338, 1672–1676.
Perez-Corona, M.T., Madrid-Albarran, Y. & Camara, C. 1999 Stability of inorganic mercury and methyl mercury on yeast-silica gel microcolumns: field sampling capabilities. Ecotoxicological and Environmental Safety 43, 149–155.
Pethkar, K.V., Gaikaiwari, R.P. & Paknikar, K.M. 2001 Biosorptive removal of contaminating heavy metals from plant extracts of medicinal plants. Current Science 80, 1216–1218.
Puranik P.R. & Paknikar K.M. 1997 Biosorption of lead and zinc from solutions using Streptoverticillium cinnamoneum waste biomass. Journal of Biotechnology 55, 113–124.
Saouter, E., Turner, R. & Barkay, T. 1994 Microbial reduction of ionic mercury for the removal of mercury from contaminated environments. Annals of the New York Academy of Sciences 721, 423–427.
Summers, A.O. & Silver, S. 1978 Microbial transformations of metals. Annual Review of Microbiology 32, 637–672.
USPHS, 1997 Toxicological profile for mercury on CD-ROM. Agency for toxic substances and disease registry. US Public Health Service.
Volesky, B. 1987 Biosorbents for metal recovery. Trends in Biotechnology 5, 96–101.
Volesky, B. 1994 Advances in biosorption of metals: selection of biomass types. FEMS Microbiology Reviews 14, 291–302.
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Karunasagar, D., Arunachalam, J., Rashmi, K. et al. Biosorption of inorganic and methyl mercury by a biosorbent from Aspergillus niger . World Journal of Microbiology and Biotechnology 19, 291–295 (2003). https://doi.org/10.1023/A:1023610425758
- methyl mercury