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联苯菊酯降解菌的筛选、鉴定及降解特性研究

Keywords: 联苯菊酯,降解菌,降解特性

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Abstract:

联苯菊酯是一种广谱高效杀虫剂,大规模的应用使其广泛残留在环境中,因此筛选联苯菊酯的高效降解菌具有重要意义。从扬州农药厂附近的地表土壤取样,利用富集驯化培养分离得到一株编号为S8的降解细菌,经表形特征、生理生化特性和16SrDNA序列分析其为醋酸钙不动杆菌(Acinetobactercalcoaceticus),该菌株在pH7.0和30℃的条件下,对100mg·L-1联苯菊酯的3d降解率达56.4%,半衰期为60.7h。其最适生长条件为:pH6.0~8.0,温度30~35℃,接种量5%。研究结果可为今后治理联苯菊酯残留污染提供理论参考。

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