Hydrolysis of organophosphate insecticides by an immobilized-enzyme system
| Autor: | D. M. Munnecke |
|---|---|
| Rok vydání: | 1979 |
| Předmět: |
Insecticides
Chromatography Immobilized enzyme Hydrolysis Kinetics Temperature Substrate (chemistry) Bioengineering Hydrogen-Ion Concentration Pesticide Enzymes Immobilized Silicon Dioxide Applied Microbiology and Biotechnology Phosphoric Monoester Hydrolases Industrial wastewater treatment chemistry.chemical_compound Organophosphorus Compounds Parathion chemistry Glass Effluent Biotechnology |
| Zdroj: | Biotechnology and Bioengineering. 21:2247-2261 |
| ISSN: | 1097-0290 0006-3592 |
| Popis: | An enzyme preparation that could detoxify parathion and eight other organophosphate pesticides was covalently bound to either porous glass or porous silica beads. This immobilized-enzyme system was examined for its use in detoxification of pesticides in production wastewaters. The kinetics of parathion hydrolysis were examined at flow rates up to 96 liter/hr and at influent substrate concentrations ranging from 10--250 mg/liter. The enzyme reactor was able to hydrolyze 95% or more of the parathion added to industrial wastewaters generated during its production, thus reducing the effluent parathion concentration to below 500 ppb. Laboratory continuous-flow experiments were conducted for 70 days with industrial wastewater and indicated no loss in immobilized-enzyme activity. The influence of pH, temperature, solvents, and detergents on enzyme stability and activity and enzyme reactor kinetics will be discussed. |
| Databáze: | OpenAIRE |
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