标题：Preliminary Analysis of Diesel-Degrading Bacteria Immobilized on Organic Carriers in Seawater
作者：Liu Zhixiu; Xue Jianliang; Wu Yanan; Li Menglu; Sun Xiyu; Cui Hao; Cheng Lijie; Gao Yu; Xiao Xinfeng
作者机构：[Liu Zhixiu; Xue Jianliang; Wu Yanan; Li Menglu; Sun Xiyu; Cui Hao; Cheng Lijie; Gao Yu; Xiao Xinfeng] Shandong Univ Sci & Technol, Coll Chem & Enviro 更多
通讯作者：Xue, JL;Gao, Y;Xiao, XF
通讯作者地址：[Xue, JL; Gao, Y; Xiao, XF]Shandong Univ Sci & Technol, Coll Chem & Environm Engn, Qingdao 266590, Peoples R China.
来源：CHINA PETROLEUM PROCESSING & PETROCHEMICAL TECHNOLOGY
关键词：oil pollution; microorganism immobilization; nutrition elements; marine; environment
摘要：Oil pollution in marine environment is becoming increasingly serious. Oil bioremediation by immobilization technology has been widely studied. However, the effect of bacteria immobilization was limited because of lack of nutrients. In this paper, the organic materials (corn straw, corn cob and corn leaf) were used as carriers. The diesel removal rate achieved by the immobilized bacteria was studied, and the effects of nutrients (e.g. nitrogen and phosphorus) released from organic carriers to the immobilized bacteria were analyzed. Test results indicated that a certain amount of nutrients was released from organic carriers. Additionally, the diesel removal rates achieved by different immobilized bacteria were all higher than those achieved by free bacteria. And, the diesel removal rates achieved by bacteria decreased in the following order: bacteria immobilized on corn straw (79%), bacteria immobilized on corn leaf (70%) and bacteria immobilized on corn cob (43%). These findings indicated two aspects, viz.: the carriers porous structure and the nutrients, which were favorable to biodegradation. Finally, the changes in nitrogen and phosphorus contents that were released from different carriers during biodegradation were studied. The results showed that the rate of diesel biodegradation was fast in the initial phase because of the sufficient nutrients released from carriers. Meanwhile, in the final phase, the rate of diesel biodegradation was relatively slow because of few nutrients released from carriers.