微生物诱导碳酸钡沉淀.pdf

第27卷第10期
无机化学学报
ol.,27No.10
2011年10月
CHINESE JOURNAL OF INORGANIC CHEMISTRY
20532060
微生物诱导碳酸钡沉淀
竹文坤2罗学刚*2张驰2周建2
西南科技大学国防科技学院,绵阳621010
(2生物质材料教育部工程研究中心,绵阳621010)
摘要:利用巴斯德芽孢杆菌繁殖过程产生的酶化作用,适时引人Ba2,形成碳酸钡沉淀,通过用X射线粉末衍射(XRD)、扫描电
子显徽镜(SEM)、傅里叶变换红外光谱FIR)、综合热分析仪①DSC-T?)对碳酸钙样品形貌、结构、热性质等进行表征。结果表明,巴
斯德芽孢杆菌诱导沉淀的磯酸钡与纯水中的不同,含有少量有机物质,晶形转变温度降低。主要为花簇状和放射状,属于正交晶
系。菌体和代谢物在碳酸钡晶体成核、生长及堆积过程中扮演重要的角色。
关键词:巴斯德芽孢杆菌:碳酸钡;生物矿化
中图分类号:0614.23*3
文就标识码:
文章编号:1001-4861(201110205308
Microbiological Precipitation of Barium Carbonate
ZHU Wen-kun12 LUO Xue-gang* ZHANG Chi ZHOU Jian?
School of Nationad Defense Science and Technology, Southest University of Science
and Technology, Mianyang, Sichuan 621010, China)
(Engineering Research Center of Biomass Materials of China Ministry of Education, Southwest University
of Science and Technology, Mianyang, Sichuan 621010, China)
Abstract: The barium carbonate precipitate was induced using enzymes in the bacillus pasteurii reproduction
and morphology, structure and thermal decomposition properties of the barium carbonate precipitates were
characterized by SEM, FTIR, XRD, DSC-TG. The results indicate that barium carbonate (Bac0, )precipitate
induced in bacillus pasteurii differs from the one induced in pure water. The Baco] crystals induced in bacillus
pasteurii has orthorhombic crystalline structure and contains a small amount of organic matters, its crystal
transition temperature decreases and shows morphologies of flower clusters and radial patterns. Bacteria and
metabolites play important roles in the process of crystal nucleation, growth and accumulation of Baco
Key words: bacillus pasteurii; barium carbonate:; biological mineralization
0 Introduction
organic macromolecules and inorganic ions interact in
the inter-phase which enables the biogenic mineral to
Biological mineralization as a common have the special multistage structure and assembl
phenomenon in nature is a process of solid phases of
regulating
inorganic mineral face separated from
assembled in biological systems. During this proce A lecular horizontal*. Taking the biocal macromo-
various materials with special advanced structures
lecules as a template, the biogenic minerals finally form
收稿日期:201103-03。收修改稿日期:2011-05-30。
国家“十ー五”科技支撑计划课题(No2007BAB18B08)资助项目。
*通讯联系人。E- nail: ]xg@swust. edu. n