Biosorption of hydrophobic organic pollutants by mixed microbial populations |
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Authors: | William C Steen Samuel W Karickhoff |
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Institution: | Environmental Research Laboratory U.S. Environmental Protection Agency College Station Road Athens, GA 30613 USA |
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Abstract: | In recognition of the need to estimate biosorption for natural microbial populations, the variability of partition coefficients for two hydrophobic pollutants to natural populations from a variety of aquatic systems was investigated. Biosorption partition coefficents for pyrene 2.46(±0.6) × 104] and phenanthrene 6.34(±1) × 103] were nearly constant over 14 different microbial sources, consisting of sediments and soils from eight states. For these condensed ring aromatics, semi-empirical equations were developed relating biosorption partition coefficients to octanol/water partition coefficients and to water solubility and melting point. Concepts and relationships developed for these materials should extend to other families of hydrophobic compounds. |
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