成晶节杆菌NT16对含氧多环芳烃1-羟基-2-萘甲酸的降解  

DEGRADATION CHARACTERISTICS OF OXYGEN-CONTAINING POLYCYCLIC AROMATIC HYDROCARBONS 1-HYDROXY-2-NAPHTHOIC ACID BY ARTHROBACTER CRYSTALLOPOIETES NT16

作　　者：赵龙妹 聂麦茜[1,2] 王琰 刘畅[1] 樊昕 ZHAO Long-mei;NIE Mai-qian;WANG Yan;LIU Chang;FAN Xin(School of Environmental and Municipal Engineering,Xi,an University of Architecture and Technology,Xi,an 710055,China;Key Laboratory of Membrane Separation of Shannxi Province,Xi,an 710055,China)

机构地区：[1]西安建筑科技大学环境与市政工程学院,西安710055 [2]陕西省膜分离重点实验室,西安710055

出　　处：《环境工程》2018年第10期113-117,共5页Environmental Engineering

基　　金：国家自然科学基金(51278405)

摘　　要：以从含氧多环芳烃污染的土壤中筛选的优势菌株成晶节杆菌NT16为对象,对菌株的生长特性和1-羟基-2-萘甲酸降解特性进行初步研究。结果发现,该菌以1-羟基-2-萘甲酸为唯一碳源和能源生长时,其最佳浓度为50 mg/L,最佳接菌量为10%,最适pH为9,最佳氮源为NH_4NO_3。在最适条件下,添加共存碳源丁二酸、丙二酸培养120 h时,菌株的生长量分别增加了62%、53%,且1-羟基-2-萘甲酸的降解率分别提高了9%、7%。研究发现,1-羟基-2-萘甲酸的浓度与降解时间符合一级反应动力学,而且碳源的添加可通过改变1-羟基-2-萘甲酸的降解途径而提高体系的矿化度。The degradation of 1 H2 NA is of great importance for the complete remediation of PAHs-contaminated environment.In this study, the degradation characteristics of 1 H2 NA were studied by the Arthrobacter sp.NT16, the strain screening from the soil contaminated with OPAHs. The results showed that NT16 could grow with only 1 H2 NA as sole carbon source, and the optimal conditions were as follows： the concentration of 1 H2 NA was 50 mg/L, the inoculated bacteria amount was 10%, pH was 9, and the nitrogen source was ammonium nitrate. Coexist in optimal conditions, adding carbon source succinic acid and malonic acid to cultivate 120 hours, the strain growth increased by 62% and 53%, respectively, and 1 H2 NA degradation rate increased by 9% and 7%, respectively. The relationship of the concentration of 1 H2 NA and the degradation time conformed to the first-order reaction kinetics.The addition of carbon source contributed to increase the mineranization of 1 H2 NA by changing its degration pathway.

关 键 词：含氧多环芳烃 成晶节杆菌 1-羟基-2-萘甲酸 丁二酸 丙二酸 降解率 矿化程度 

分 类 号：X172[环境科学与工程—环境科学] X592