Aerobic degradation of an endocrine-disrupting chemicals, di-n-butyl phthalate by microorganism

Abstract

In this article,the characteristics of DBP biodegradation were investigated by a degrading bacterium isolated from the mangrove soil.The experimental results showed that dibutyl phthalate（DBP）,as a sole source of carbon and energy,can be degraded and one of the degradation intermediates was identified as mono-butyl phthalate.The tentative pathway proposed for degradation of DBP by the bacterium under the aerobic condition could be through monoester initially, and further degradation of monoester produces phthalic acid,and finally CO2 and H2O. 通過馴化富集培養,從紅樹林底泥中分離出一株鄰苯二甲酸二丁基酯降解菌。實驗研究了鄰苯二甲酸二丁基酯降解菌對鄰苯二甲酸二丁基酯的生物降解特性并探討了可能的生物降解途徑。實驗得出作為唯一碳源和能源的鄰苯二甲酸丁基酯能夠在好氧條件下降解,濃度為50 mg/L的鄰苯二甲酸二丁基酯在48 h內可以完全被降解。檢測到一種中間產物為鄰苯二甲酸一丁基酯估計在降解過程中可能有鄰苯二甲酸產生。試驗結果表明,細菌對鄰苯二甲酸二丁基酯具有高效降解作用。