小球藻表面酯基屏蔽对钙锶生物矿化的影响  

The Effects of the Ester Group of Chlorella on the Biomineralization of Calcium and Strontium

作　　者：刘媛媛[1] 刘明学[1,2] 董发勤[2] 黄婷[1] 郭玉婷[1] 王建萍[1] 

机构地区：[1]西南科技大学生命科学与工程学院,四川绵阳621010 [2]固体废物处理与资源化教育部重点实验室,四川绵阳621010

出　　处：《矿物学报》2015年第4期555-560,共6页Acta Mineralogica Sinica

基　　金：国家自然科学基金项目(批准号:41272371;41102213);NSAF项目(编号:11176028);创新基金(编号:15ycx077)

摘　　要：生物矿化作用是在有机基质全程参与调控与诱导下形成矿物的过程。本文以钙锶为研究对象,通过小球藻对钙锶的生物矿化诱导,探索钙锶形成稳定矿化体的条件和方法。通过SEM,FT-IR和XRD来考察小球藻表面基团酯基屏蔽前后对钙锶生物矿物的影响。结果表明:1锶离子浓度较高时,晶体更易生成文石结构;2钙离子浓度偏高时,则更偏爱方解石;3在小球藻的作用下,晶体的取向更易受浓度较大的离子的影响;4当屏蔽小球藻表面基团酯基后,钙离子及锶离子对晶体的成核取向上的调控能力减弱。简言之,小球藻表面基团酯基能促进晶型的转换。Biomineralization is the process of forming minerals which regulation and inducement by organic substrate. Calcium and strontium were taken as the research object, based on chlorella biomineralization induction of calcium and strontium by ester group of chlorella, conditions and methods for the formation of stable mineral were studied. By using SEM, XRD and FT-IR, effects of the surface group of chlorella on the biomineralization of Ca and Sr were investigated. When strontium ion concentration is higher, most crystal is aragonite phase; when calcium ion concentration is higher, the calcite crystal is higher. Crystal orientation is more easily affected by high content of ions under the action of chlorella. When ester base of the chlorella is shielded, the ability of controlling nucleation of crystal orientation by calcium and strontium is weaken. In conclusion, ester of the chlorella can promote the conversion of crystal type, and can regulate the morphology of crystals.

关 键 词：生物矿化 小球藻 修饰酯基 锶离子 钙离子 

分 类 号：P579[天文地球—矿物学] Q939.9[天文地球—地质学]