硅藻土对诺卡氏菌的吸附作用  

Adsorption Process of Diatomite for Nocardia

作　　者：沈岩柏[1] 朱一民[1] 魏德洲[1] 苏秀娟[1] 

机构地区：[1]东北大学资源与土木工程学院,辽宁沈阳110004

出　　处：《东北大学学报（自然科学版）》2005年第2期183-185,共3页Journal of Northeastern University(Natural Science)

基　　金：国家自然科学基金资助项目(50174014);辽宁省自然科学基金资助项目(20022025)

摘　　要：研究了吉林长白硅藻土吸附水相中诺卡氏菌的吸附过程,讨论了吸附时间、硅藻土用量、溶液初始pH值和吸附温度等实验条件对吸附效果的影响·实验结果表明,硅藻土对水相中的诺卡氏菌具有较好的吸附效果·该吸附过程进行得较快,在20min左右即可达到吸附平衡;在溶液初始pH值为7 0～9 0内都有较好的吸附效果;温度对吸附过程的影响不大,室温条件下操作即可;在诺卡氏菌浓度一定的条件下,适量增加硅藻土用量可以提高吸附效果·扫描电镜分析结果表明,硅藻土表面的微孔和诺卡氏菌表面的菌丝可能是吸附过程的主要吸附位·Investigates the process that Nocardia is adsorbed onto the diatomite from Changbai Mountain area in Jilin Province PRC, with the effects of adsorption time, diatomite dosage, initial pH value of solution and adsorption temperature on the adsorptivity discussed. The results showed that the diatomite used has a favorable adsorbing effect by which the adsorbing process is so quick that an equilibrium is attainable for about 20min. A good result can be attained in a range of pH value from 7.0 to 9.0. Temperature has no significant effect on adsorbing process. The adsorbing effect can be improved further by adding dosage of diatomite properly for a certain Nocardia concentration. Scanning results revealed that the surface pores of diatomite and mycelia on Nocardia surface are possibly the main adsorption location.

关 键 词：硅藻土 吸附 诺卡氏菌 微生物 

分 类 号：X172[环境科学与工程—环境科学]