羟肟酸类捕收剂的生物降解性能及机理研究  

Study on Biodegradability and Mechanism of Hydroxamic Acid Collectors

作　　者：鄢恒珍[1,2] 龚文琪[1] 梅光军[1] 陈晓东[1] 陈绍华[1] 

机构地区：[1]武汉理工大学资源与环境工程学院,湖北武汉430070 [2]湖南城市学院城市建设系,湖南益阳413000

出　　处：《中国给水排水》2010年第15期89-91,共3页China Water & Wastewater

基　　金：国家高技术研究发展计划(863)项目(2007AA06Z123);国家重点基础研究发展计划(973)项目(2004DB619204);湖南省科技计划项目(2008SK4012)

摘　　要：采用振荡培养法研究了混合菌种对羟肟酸类捕收剂的生物降解能力。结果表明:水杨羟肟酸、苯甲羟肟酸、N-羟基邻苯二甲酰亚胺和H205这4种羟肟酸类捕收剂在第7天的生物降解度分别为93.3%、86.9%、86.5%和21.9%,由GB/T15818—2006可知,前3种捕收剂均属于易初级生物降解有机物,H205为难生物降解有机物。羟肟酸类捕收剂的生物降解过程符合一级反应动力学方程,上述4种捕收剂的反应速率常数排序为k水杨羟肟酸>k苯甲羟肟酸>kN-羟基邻苯二甲酰亚胺>kH205。Based on the shaking cultivation method, the mixed bacteria were used to study the biodegradability of hydroxamic acid collectors. The biodegradation rates of salicylhydroxamic acid, benzo- hydroxamic acid, N-hydroxy phthalimide and H205 on the seventh day are 93.3% , 86.9% , 86.5% and 21.9% respectively. According to GB/T 15818 -2006, the first three collectors are easy primary biode- gradable organic compounds, and H205 is refractory organic matter. The biodegradation process of hydroxamic acid collectors follows the first-order reaction kinetics. The descending order of reaction rate constant of the above mentioned compounds is salicylhydroxamic acid 〉 benzohydroxamic acid 〉 N-hydroxy phthalimide 〉 H205.

关 键 词：羟肟酸类捕收剂 生物降解性能 反应动力学 

分 类 号：X703[环境科学与工程—环境工程]