摘要
产脲酶微生物诱导的碳酸钙沉淀是自然界生物矿化的重要组成部分,这一过程依靠微生物代谢产生的脲酶,高效催化尿素水解产生的碳酸根离子进而与钙离子形成碳酸钙沉淀.从产脲酶MICP矿化机理、微生物分布和工程应用三个方面,探讨了相应的最新进展,并对产脲酶MICP的进一步研究提出了思路和建议.MICP微生物属于氨化细菌的范畴,大都分布在厚壁菌门,然而在变形菌门、放线菌门和真菌界等亦发现了产脲酶菌,芽孢杆菌科的细菌是目前发现的具有前景的一类产脲酶微生物,如Bacillus和Sporosarcina属.产脲酶MICP在微生物建筑材料、土体性能的改善和重金属及放射性金属的治理方面有着广泛的应用前景.
Microbial induced calcium precipitation（MICP）is an important part of biological mineralization process in nature.The process relies on urease during metabolism to catalyze the hydrolysis of urea effectively and to produce carbonate ions,which contributes to the formation of calcium carbonate in the presence of calcium ions.This paper discusses the corresponding recent advances in relate to the mineralization mechanism of urease MICP,microbial distribution and engineering application,and puts forward some ideas and suggestions for the further research of MICP by ureolytic microbes.MICP microorganisms belongs to the category of ammonifying bacteria,and is mostly distributed in the Bacillaceae of Firmicutes.However,urease producing microorganisms were also found in the Proteobacteria,Actinobacteria and Fungi.Bacteria of Bacillaceae are currently found to be promising for urease production,such as Bacillus and Sporosarcina.Urease based MICP has a broad application prospect in the improvement of microbial building materials,the improvement of soil properties and the treatment of heavy metals and radioactive metals.
作者
季斌
陈威
樊杰
宋宏娇
魏桃员
Ji Bin Chen Wei Fan Jie Song Hongjiao Wei Taoyuan(School of Urban Construction,Wuhan University of Science and Technology,Wuhan,430065 ,Chin)
出处
《南京大学学报（自然科学版）》
CAS
CSCD
北大核心
2017年第1期191-198,共8页
Journal of Nanjing University（Natural Science）
基金
湖北省教育厅中青年人才项目(Q20161116)
武汉科技大学青年人才项目(2016xz033)
关键词
产脲酶微生物
微生物诱导钙沉淀
微生物水泥
共沉淀
厚壁菌门
ureolytic microbes
microbial induced calcium precipitation
biocement
coprecipitation
Firmicutes
