TY - GEN
T1 - The comparison of microbiologically-induced calcium carbonate precipitation and magnesium carbonate precipitation
AU - Sun, Xiaohao
AU - Miao, Linchang
N1 - Funding Information:
Acknowledgments. This work was supported by the National Natural Science Foundation of China (No. 51578147) and Scientific Research Foundation of Graduate School of Southeast University (No. YBJJ1846).
Publisher Copyright:
© Springer Nature Singapore Pte Ltd. 2019.
PY - 2019
Y1 - 2019
N2 - Similar to calcium carbonate, magnesium carbonate also has a cementing character, and the strength of magnetite ore is much higher than calcium ore. In this paper, firstly, the effects of different ions, such as the concentration of Ca 2+ and Mg 2+ , on the urease activity of Sporosarcina pasteurii were researched. Then the productive rates for calcium carbonate and magnesium carbonate were comparatively analyzed. Finally, with adding various amounts of urea to medium, the productive rates for magnesium carbonate were compared. The results show that the increase in the magnesium ion enhances urease activity, while calcium with high concentration significantly impairs it. Under the same conditions, productive rate for magnesium carbonate is smaller than its calcium counterpart. However, the method adding urea to the medium significantly promotes to form precipitation, and with higher urea concentration, more magnesium precipitation is got. Therefore, the presented method can solve the problem that insufficient magnesium precipitation cannot solidify sands, which acts as a guide for the magnesium carbonate sand solidification technology.
AB - Similar to calcium carbonate, magnesium carbonate also has a cementing character, and the strength of magnetite ore is much higher than calcium ore. In this paper, firstly, the effects of different ions, such as the concentration of Ca 2+ and Mg 2+ , on the urease activity of Sporosarcina pasteurii were researched. Then the productive rates for calcium carbonate and magnesium carbonate were comparatively analyzed. Finally, with adding various amounts of urea to medium, the productive rates for magnesium carbonate were compared. The results show that the increase in the magnesium ion enhances urease activity, while calcium with high concentration significantly impairs it. Under the same conditions, productive rate for magnesium carbonate is smaller than its calcium counterpart. However, the method adding urea to the medium significantly promotes to form precipitation, and with higher urea concentration, more magnesium precipitation is got. Therefore, the presented method can solve the problem that insufficient magnesium precipitation cannot solidify sands, which acts as a guide for the magnesium carbonate sand solidification technology.
KW - Calcium carbonate
KW - Magnesium carbonate
KW - Productivity rate
KW - Sporosarcina pasteurii
UR - http://www.scopus.com/inward/record.url?scp=85060573122&partnerID=8YFLogxK
U2 - 10.1007/978-981-13-2227-3_37
DO - 10.1007/978-981-13-2227-3_37
M3 - Conference article published in proceeding or book
AN - SCOPUS:85060573122
SN - 9789811322266
T3 - Environmental Science and Engineering
SP - 302
EP - 308
BT - Proceedings of the 8th International Congress on Environmental Geotechnics Volume 3 - Towards a Sustainable Geoenvironment
A2 - Zhan, Liangtong
A2 - Chen, Yunmin
A2 - Bouazza, Abdelmalek
PB - Springer Berlin Heidelberg
T2 - 8th International Congress on Environmental Geotechnics, ICEG 2018
Y2 - 28 October 2018 through 1 November 2018
ER -