摘要
以聚乙烯醇(polyvinylalcohol,PVA)和海藻酸钠(sodiumalginates,Na·Alg)作为包埋载体,以五硼酸铵和氯酸铁、氯酸铝溶液作为交联剂,固定微杆菌Microbacteriumsp.S2-4,制备得到固定化球形颗粒。利用扫描电子显微镜(SEM)分析了在去除污染地表水COD过程中固定化球形颗粒的微环境变化,指出物理阻隔、吸附和种群排斥联合作用是固定化微环境对不利外界环境的主要屏蔽机理;同时还指出了通过该方法制备得到的固定化颗粒存在的结构缺陷。
With polyvinyl alcohol and sodium alginate as immobilizing carriers, and borate ammonium, ferrite chlorate and aluminum chlorate as cross-linking reagents, the spherical granules of immobilized Microbacterium sp. S2-4 were prepared, and their microenvironmental changes in the process of COD- removing from contaminated surface water were studied by scanning electron microscope （SEM）. The results indicated that physical block, adsorption, and the expulsion by predominant microbial populations were the main factors shielding the positive effects of the gran- ules. Some structural disfigurements of the immobilized granules were pointed out.
出处
《生态学杂志》
CAS
CSCD
北大核心
2007年第1期16-20,共5页
Chinese Journal of Ecology
基金
国家重点基础研究发展规划项目(2004CB418506)
辽宁省教育厅青年基金资助项目(2005264)
关键词
固定化微生物
微环境
屏蔽
扫描电子显微镜
污染地表水
immobilized microbe
micro-environment
shielding
scanning electron microscope
contaminated surface water.
