title: Microbial decontamination of parathion and p-nitrophenol in aqueous media.
abstract: A mixed microbial culture was adapted to growth on parathion to determine the feasibility of using microorganisms to detoxify concentrated parathion in agricultural wastes. In a 600-ml chemostat, the culture was able to degrade 50 mg of parathion per liter per h. Para-nitrophenol, produced by enzymatic hydrolysis of parathion, caused delays in exponential growth which were directly proportional to its concentration. A pseudomonad, isolated from the mixed culture, exhibited optimal growth at 0.21 mM p-nitrophenol and grew in concentrations up to 3.5 mM. In metabolic studies using [(14)C]p-nitrophenol, the nitro group was removed in stoichiometric quantities as nitrite and hydroquinone was tentatively identified as a metabolite.
mesh_terms: D001419:Bacteria / Q000254:growth & development / Q000378:metabolism*; D001673:Biodegradation, Environmental; D002250:Carbon Radioisotopes; D002849:Chromatography, Gas; D002855:Chromatography, Thin Layer; D003470:Culture Media; D007220:Industrial Waste; D009573:Nitrites / Q000096:biosynthesis; D009596:Nitrophenols / Q000378:metabolism*; D010278:Parathion / Q000378:metabolism*; D011549:Pseudomonas / Q000254:growth & development / Q000378:metabolism; D012722:Sewage; D012988:Soil Microbiology; D014871:Water Microbiology
chemical_list: D002250:Carbon Radioisotopes; D003470:Culture Media; D007220:Industrial Waste; D009573:Nitrites; D009596:Nitrophenols; D012722:Sewage; D010278:Parathion