The comparison of microbiologically-induced calcium carbonate precipitation and magnesium carbonate precipitation

Xiaohao Sun, Linchang Miao

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

10 Citations (Scopus)

Abstract

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.

Original languageEnglish
Title of host publicationProceedings of the 8th International Congress on Environmental Geotechnics Volume 3 - Towards a Sustainable Geoenvironment
EditorsLiangtong Zhan, Yunmin Chen, Abdelmalek Bouazza
PublisherSpringer Berlin Heidelberg
Pages302-308
Number of pages7
ISBN (Print)9789811322266
DOIs
Publication statusPublished - 2019
Externally publishedYes
Event8th International Congress on Environmental Geotechnics, ICEG 2018 - Hangzhou, China
Duration: 28 Oct 20181 Nov 2018

Publication series

NameEnvironmental Science and Engineering
ISSN (Print)1863-5520
ISSN (Electronic)1863-5539

Conference

Conference8th International Congress on Environmental Geotechnics, ICEG 2018
Country/TerritoryChina
CityHangzhou
Period28/10/181/11/18

Keywords

  • Calcium carbonate
  • Magnesium carbonate
  • Productivity rate
  • Sporosarcina pasteurii

ASJC Scopus subject areas

  • Environmental Engineering
  • Information Systems

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