Removal of Heavy Metals from the Environment by Biosorption
Tóm tắt
The pollution of the environment with toxic metals is a result of many human activities, such as mining and metallurgy, and the effects of these metals on the ecosystems are of large economic and public‐healthsignificance. This paper presents the features and advantages of the unconventional removal method of heavy metals – biosorption – as a part of bioremediation. Bioremediation consists of a group of applications, which involvethe detoxification of hazardous substances instead of transferring them from one medium to another, by means of microbes and plants. This process is characterized as less disruptive and can be often carried out on site, eliminating the need to transport the toxic materials to treatment sites. The biosorption (sorption of metallic ions from solutions by live or dried biomass) offers an alternative to the remediation of industrial effluents as well as the recovery of metals contained in other media. Biosorbents are prepared from naturally abundant and/or waste biomass. Due to the high uptake capacity and very cost‐effective source of the raw material, biosorption is a progression towards a perspective method. The mechanism by which microorganisms take up metals is relatively unclear, but it has been demonstrated that both living and non‐living biomass may be utilized in biosorptive processes, as they often exhibit a marked tolerance towards metals and other adverse conditions. One of their major advantages is the treatment of large volumes of effluents with low concentrations of pollutants. Models developed were presented to determine both the number of adsorption sites required to bind each metal ion and the rate of adsorption, using a batch reactor mass balance and the Langmuir theory of adsorption to surfaces or continuous dynamic systems. Two main categories of bioreactors used in bioremediation – suspended growth and fixed film bioreactors – are discussed. Reactors with varying configurations to meet the different requirements for biosorption are analyzed considering two major groups of reactors –
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Tài liệu tham khảo
Lloyd J.R., 2002, Bioremediation of metals: The application of micro‐organisms that make and break minerals, Microbiol. Today, 29, 67
F. Malekzadeh A. Farazmand H. Ghafourian M. Shahamatet al Accumulation of heavy metals by a bacterium isolated from electroplatig effluent inBiotechnology Risk Assessment(Eds: M. Levin C. Grim S. Angle) VIRTUE Newsletter: Science1997. Online at:http://www.miljolare.no/virtue/newsletter/01_03/sci‐shahamat/more‐info/publications.php
Scott J.A., 1986, Decontamination of liquid streams containing cadmium by biomass adsorption, J. Chem. E. Symp., 96, 211
MacAskie L.E., 1984, Cadmium accumulation by a Citrobacter sp., J. Gen. Microbiol., 130, 53
S. Silver Bacterial heavy metal resistance systems and possibility of bioremediation inBiotechnology Bridging Research and Applications Kluwer Academic Publishers London1991 265–287.
Ag‐West Biotech Inc. Microbes: Building Blocks for Biotechnology AgBiotech Infosource1998 37. (http://www.agwest.sk.ca/e_infosrc.shtml)
Bartnickni‐García S., 1968, Cell wall chemistry: Morphogenesis and taxonomy in fungi, Annu. Rev. Microbiol., 22, 64
B. Volesky Biosorption for the next century International Biohydrometallurgy Symp. El Escorial Spain June 20–23 1999. (http://ww2.mcgill.ca/biosorption/publication/BVspain/BVspain.htm)
Standberg G.W., 1981, Microbial cells as biosorbents for heavy metals: Accumulation of uranium by Saccharomyces cerevisiae and Pseudomona aeruginosa, Appl. Environ. Microbiol., 237, 10.1128/aem.41.1.237-245.1981
G. W. Bedell D. W. Darnall Immobilization of nonviable biosorbent algal biomass for the recovery of heavy metal ions inBiosorption of Heavy Metals(Ed: B. Volesky) CRC Press Boca Raton1990 313–325.
M. N. Hughes R. K. Poole Metals and Microorganisms Chapman and Hall London1989.
Haluk Çeribasi I., 2001, Biosorption of Ni(II) and Pb(II) by Phanerochaete chrysosporium from a binary metal system – Kinetics, Water SA., 27, 15
Wang Q., 2001, Phytoremediation: An effective approach of heavy metal cleanup from contaminated soil, Acta Ecol. Sinica, 326
P. H. Howard R. S. Boethling W. F. Jarvis W. M. Meylanet al. Handbook of Environmental Degradation Rates Lewis Publishers Chelsea MI USA1991.
C. L. Bagger C. Bjergegaard H. Sørensen J. C. Sørensenet al. High quality oils proteins and bioactive products for food and non‐food purposes produced in pilot plant scale by biorefining of cruciferous crops inNew Horizons for an Old Crop inProc. 10th Int. Rapeseed Congress Canberra Australia1999. (http://www.regional.org.au/au/gcirc/5/568.htm#TopOfPage)
L. A. Smith B. C. Alleman L. Copley‐Graves Biological treatment options inEmerging Technology for Bioremediation of Metals(Eds: J. L. Means R. E. Hinchee) Lewis Publishers New York1994.
US Biotechnology Research Subcommittee Committee on Fundamental Science and the National Science and Technology Council Biotechnology for the 21st Century: New Horizons Biotechnology Information Center National Agricultural Library USDA/ARS July1995. (http://www.nal.usda.gov/bic/bio21/intro.html)
H. Watling New microorganisms for faster bioleaching inProcess CSIRO Research in Mineral Processing and Metal Production 2nd ed.2002 1–2.
J. A. Scott S. J. Palmer J. Ingham Microbial metal adsorption enhancement by naturally excreted polysaccharide coatings inImmobilization of Ions by Biosorption(Eds: H. Eccles S. Hunt) Society of the Chemical Industry London1986 81–88.
Dodic S.N., 2000, Kinetics of zinc biosorption by Saccharomyces cerevisiae cells, Rom. Biotech. Lett., 5, 31
B. Volesky Biosorption: Application Aspects – Process Simulation Tools.(www.mcgill.ca)
B. Volesky Biosorption of Heavy Metals CRC Press Boca Raton1990.
Roman R.V., 1994, The filtration of some antibiotic biosynthesis liquids, Hung. J. Ind. Chem., 22, 161
Ehrlich H.L., 1997, Microbes and metals, Acta Biotechnol., 48, 687
Summers A.P., 1974, Cell‐free mercury(II) reducing activity in a plasmid‐bearing strain of Escherichia coli, J. Bacteriol., 119, 242, 10.1128/jb.119.1.242-249.1974
H. L. Ehrlich Geomicrobiology Marcel Dekker New York1996.
Beveridge T.J., 1981, Binding of metals to cell envelopes of Escherichia coli K‐12, Appl. Environ. Microbiol., 4, 325, 10.1128/aem.42.2.325-335.1981
E. L. Andersson Analysis of various bioreactor configurations for heavy metal removal using the fungusPenicillium ochro‐chloron MSc Thesis Worcester Polytechnic Institute Worcester MAS USA1999.
Kogej A., 2001, Laboratory experiments of lead biosorption by self‐immobilized Rhizopus nigricans pellets in the batch stirred tank reactor and the packed bed column, Chem. Biochem. Eng. Q., 15, 75
A. Blanco Immobilization of non‐viable cyanobacteria and their use for heavy metal adsorption from water inEnvironmental Biotechnology and Cleaner Bioprocesses(Eds: E. J. Olguin G. Sanchez E. Hernandez) Philadelphia2000 135–151.
Biosorbents for Metal Ions(Eds: J. Wase C. Forster) Taylor‐ Francis Bristol1997.
He L.M., 1998, Surface charge properties of and Cu(II) adsorption by spores of the marine Bacillus sp. Strain SG‐1, Appl. Environ. Microbiol., 64, 1123, 10.1128/AEM.64.3.1123-1129.1998
Philip I., 1995, Biosorption of copper (II) by Pseudomonas aeruginosa, Int. J. Environ. Pollut., 5, 92
R. M. Sterritt J. N. Lester Heavy metal immobilisation by bacterial extracellular polymers inImmobilisation of Ions by BioSorption(Eds: H. Eccles S. Hunt) Society for Chemical Industry London1996 121–145.
Shuttleworth K.L., 1993, Sorption of heavy metals to the filamentous bacterium Thiothrix Strain A1, Appl. Environ. Microbiol., 59, 1274, 10.1128/aem.59.5.1274-1282.1993
R. I. Masel Principles of Adsorption and Reaction on Solid Surfaces John Wiley New York1996.
B. Volesky Biosorption: Application Aspects – Process Simulation Tools (http://www.mcgill.ca)
D. Vance Metals and Groundwater part II:In‐situ Bioremediation of Metals Contaminated Groundwater. (http://2the4.net/metal2bio.htm)
R. V. Roman M. Gavrilescu Transfer Phenomena in Bioprocesses Dosoftei Press Iasi Romania1997(in Romanian).
M. Gavrilescu Pneumatic Bioreactors Dosoftei Press Iasi Romania1997(in Romanian).
A. Atkinson P. Mavituna Biochemical Engineering and Biotechnology Handbook Stockton Press New York1991.
U.S. Environmental Protection Agency Cleaning up the Nation's Waste Sites: Markets and Technology Trends Office of Solid Waste and Emergency Response and Technology Innovation Office Washington1996.
Gupta R., 2000, Microbial biosorbents: Meeting challenges of heavy metal pollution in aqueous solutions, Current Sci., 78, 967
K. Kuyucak Feasibility of biosorbents application inBiosorption of Heavy Metals(Ed: B. Volesky) CRC Press Boca Raton1997 371–378.
Atkinson B.W., 1998, Considerations for application of biosorption technology to remediate metal‐contaminated industrial effluents, Water SA, 24, 129