Journal
ADVANCES IN MATERIALS SCIENCE AND ENGINEERING
Volume 2017, Issue -, Pages -Publisher
HINDAWI LTD
DOI: 10.1155/2017/7874251
Keywords
-
Categories
Funding
- Fundamental Science on Nuclear Wastes and Environmental Safety Laboratory [14zxnk02, 15kffk02]
- Sichuan Province Science and Technology Pillar Program [2014GZ0185]
- National Natural Science Foundation of China [21601147, 21406182]
- Science and Technology Department of Sichuan Province [2017GZ0342]
- Projects in the Sichuan Province Science and Technology Pillar Program [2016GZ0259, 2016GZ0277]
- Plan Projects of Mianyang Science and Technology [15zd2110, 15zd2102]
Ask authors/readers for more resources
Carbonate mineralization microbe is a microorganism capable of decomposing the substrate in the metabolic process to produce the carbonate, which then forms calcium carbonate with calcium ions. By taking advantage of this process, contaminative uranium tailings can transform to solid cement, where calcium carbonate plays the role of a binder. In this paper, we have studied the morphology of mineralized crystals by controlling the mineralization time and adding different concentrations of montmorillonite (MMT). At the same time, we also studied the effect of carbonate mineralized cementation uranium tailings by controlling the amount of MMT. The results showed that MMT can regulate the crystal morphology of calcium carbonate. What is more, MMT can balance the acidity and ions in the uranium tailings; it also can reduce the toxicity of uranium ions on microorganisms. In addition, MMT filling in the gap between the uranium tailings made the cement body more stable. When the amount of MMT is 6%, the maximum strength of the cement body reached 2.18 MPa, which increased by 47.66% compared with that the sample without MMT. Therefore, it is reasonable and feasible to use the MMT to regulate the biocalcium carbonate cemented uranium tailings.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available