菌株scl-2对苯线磷、哒嗪硫磷和丙溴磷降解的研究

研究了有机磷农药降解菌株Arthrobacter sp.scl-2对苯线磷、哒嗪硫磷和丙溴磷的降解特性,结果表明菌株scl-2可以利用苯线磷、哒嗪硫磷和丙溴磷为唯一磷源生长.菌株scl-2降解苯线磷、哒嗪硫磷和丙溴磷的最适温度均为30℃,哒嗪硫磷的降解在初始pH8时速度最快,而丙溴磷和苯线磷的最适初始pH均为7,偏酸偏碱均不利于菌株对苯线磷、哒嗪硫磷、丙溴磷的降解.利用气相色谱-质谱联机鉴定了苯线磷、哒嗪硫磷、丙溴磷的降解产物,分别为3-甲基-4-甲硫基苯酚、6-羟基-2-苯基-2-氢哒嗪酮和4-溴-2-氯苯酚.

Biodegradation of pyridaphenthion,fenamiphos and profenofos by Arthrobacter sp.scl-2 and identification of the metabolites

In this paper, the degradation characteristics of some organophosphorus_insecticides including pyridaphention, fenamiphos and profenofos by the isocarbophos-degrading strain Arthrobacter sp. scl-2were studied. It was found that strain scl-2could use pyridaphention, fenamiphos and profenofos as the sole phosphorus source for growth. The optimal temperature for the biodegradation of pyridaphention, fenamiphos and profenofos by strain scl-2was 30°C. The initial pH value for pyridaphention biodegradation was 8.0. However, the optimal pH values for fenamiphos and profenofos were found to be 7.0. Using the GC-MS technology, the metabolites of pyridaphention, fenamiphos and profenofos degraded by strain scl-2were identified to be 6-hydroxy-2-phenylpyridazin-3(2H)-one, 3-Methyl-4-methylsulfanyl-phenol and 4-bromo-2-chlorophenol, respectively.