Removal of chloro and nitro aromatic wastewater pollutants by ozonation and biotreatment

Article Abstract:

The effectiveness of ozonation and biotreatment in removing a variety of chloro- and nitro-substituted aromatic wastewater pollutants was investigated. The results showed that degradation and elimination rates were higher at pH 7 than those at pH 2 and pH 12. After elimination of the aromatic compounds, the concentration of dissolved ozone dramatically increased. Combined ozonation-biotreatment resulted in the mineralization of recalcitrant chloro and nitro aromatics.

Research, Sewage, Aromatic compounds, Sewage treatment, Ozonization

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Group contribution method for predicting equilibria of nonionic organic compounds between soil organic matter and water

Article Abstract:

Prediction partition coefficients for nonionic organic compounds between soil organic matter (SOM) and water are defined using a group contribution model. The model is a modification of the UNIFAC method for finding activity coefficients and integrates compound chemical structure and SOM representative structure. Sorption equilbrium is predicted using the modified model.

Models, Water, Organic compounds, Humus, Nonionic contrast media

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