碳酸钙微生物风化试验研究  

Experimentation of microbial weathering to CaCO_3

作　　者：丁丽君[1] 连宾[2] 

机构地区：[1]贵州大学生命科学学院,贵州贵阳550025 [2]中国科学院地球化学研究所环境地球化学国家重点实验室,贵州贵阳550002

出　　处：《中国岩溶》2008年第3期197-200,共4页Carsologica Sinica

基　　金：国家重点基础研究发展计划973项目(2006CB403202);国家自然科学基金项目(批准号40773069)

摘　　要：利用采自贵州金阳三叠纪石灰岩和白云岩样品分离得到的3种细菌、3种真菌以及1种放线菌,并据此进行微生物对碳酸钙风化的实验研究。结果表明,微生物风化碳酸钙的能力大小为:真菌>放线菌>细菌>空白>去离子水;接入微生物的实验组对碳酸钙的风化作用远比对照实验组的大;微生物风化溶解碳酸钙能力的大小与培养液的pH值关系不大。7种微生物中,风化作用最强的FeM 001菌株风化碳酸钙并释放钙离子的能力是培养基对照组的7.89倍和去离子水对照组的34.13倍;其它5种微生物对碳酸钙的风化效率均明显高出培养基对照组的风化效率。分析认为产生上述结果的原因是微生物的生长繁殖对碳酸钙风化具有促进作用,即微生物能通过直接接触或分泌酶等活性物质来加速碳酸钙的风化。Several microorganisms are isolated from the surface of limestone and dolomite of the Triassic period sampled from Jinyang, Guiyang, Guizhou province. Three strains of bacteria and fungi and one strain of actinomycete are chosen in the study of weathering to CaCO3. The preliminary results show that the ability of microorganism weathering to CaCO3 is as follows ： Fungi〉 actinomycete〉 bacteria 〉culture medium 〉deionized water. For CaCO3 weathering capacity, the experimental group of inoculating microorganism is better than the experimental group without microorganism inoculation. Moreover, relationship between the CaCO3 dissolving capacity and the pH value is inconspicuous. The effect of strain FeM001 on CaCO3 weathering and releasing Ca^2＋ is the strongest among seven chosen species of microorganisms, and are 7.89 and 34.13 times stronger respectively compared with the culture medium controlled and deionized water controlled group; the effects of other 5 species of microorganisms on CaCO3 weathering outdo obviously the controlled group. The analysis indicates the growth of microorganism can promote the effect of weathering to CaCO3. Possibly, CaCO3 weathering can be accelerated through the direct contact with microbes, the secretion enzyme and acidic organic-matters from the microorganisms.

关 键 词：微生物 碳酸钙 风化作用 

分 类 号：P595[天文地球—地球化学]