Dynamics of organic micropollutant biosorption to cyanobacteria and detritus

Article Abstract:

The influence of bacteria, phytoplankton and detritus on the mechanics of transport and food web accumulaton of hydrophobic organic compounds in aquatic systems was studied by means of gas purge desorption experiments. Fresh Anabaena spp. cells were investigated for their sorption and adsorption characteristics using chlorobenzene as micropollutant. The desorption kinetics were then determined by means of a statistical model. Results indicate that the values of carbon-normalized sorption coefficients for algae and detritus are directly proportional to the C N atomic ratios of the adsorbents.

Algae, Marine bacteria

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Reduction of substituted nitrobenzenes in aqueous solution containing natural organic matter

Article Abstract:

The mediation of natural organic matter (NOM) in the reduction of substituted nitrobenzenes in a hydrogen sulfide-containing aqueous solution is discussed. The effect of organic matter from different natural sources were evaluated and quantified from different natural sources on the basis of reduction kinetics. The effect of substituents on the rate of reduction of the nitro group were used to produce quantification relationships. Results indicate that hydroquinone moities within NOM are crucial for the mediation of electron-transfer reactions involving organic pollutants,

Organic compounds

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Effects of salinity changes and the formation of dissolved organic matter coatings on the sorption of phenanthrene: implications for pollutant trapping in estuaries

Article Abstract:

Sorption of hydrophobic pollutants is conjectured to be an important cause of pollution in estuaries. The sorption of the polycyclic aromatic compound phenanthrene and organic carbon kaolinite were examined. Research on the sorption enhancement of these pollutants by "salt effects" and dissolved organic matter, however, shows that estuarine pollutant trapping cannot be attributed fully to the equilibrium sorption of the pollutants.

Research and Development in the Physical, Engineering, and Life Sciences, Water Pollution Control R&D, Pollution, Water pollution research, Estuaries

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