Influence of humic acid on microbial induced carbonate precipitation for organic soil improvement

Chen, Meiqi; Gowthaman, Sivakumar; Nakashima, Kazunori; Kawasaki, Satoru

Influence of humic acid on microbial induced carbonate precipitation for organic soil improvement

Chen, Meiqi; Gowthaman, Sivakumar; Nakashima, Kazunori et al.

Environmental science and pollution research, 2023, 30(6), 15230-15240

Permalink : https://hdl.handle.net/2115/90426

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論文情報

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アクセス権	open access
URI	https://hdl.handle.net/2115/90426
タイトル	Influence of humic acid on microbial induced carbonate precipitation for organic soil improvement
著者	Chen, Meiqi ; Gowthaman, Sivakumar ; Nakashima, Kazunori ; Kawasaki, Satoru
著者名 Chen, Meiqi
著者名 Gowthaman, Sivakumar
著者名 Nakashima, Kazunori
e-Rad_Researcher 00304022 著者名 Kawasaki, Satoru
言語	英語
キーワード	Humic acid (HA)
	Microbial induced carbonate precipitation (MICP)
	Urease activity
	CaCO3 morphology
	Soil improvement
発行日	2023-02
出版者	Springer
収録物名	Environmental science and pollution research
巻(号)	30(6)
ページ	15230-15240
抄録	Microbial induced carbonate precipitation (MICP) is one of the most commonly researched topics on biocementation, which achieves cementation of soil particles by carbonate from urea hydrolysis catalyzed by microbial urease. Although most MICP studies are limited to stabilizing sandy soils, more researchers are now turning their interest to other weak soils, particularly organic soils. To stabilize organic soils, the influence of humic substances should be investigated since it has been reported to inhibit urease activity and disrupt the formation of calcium carbonate. This study investigates the effect of humic acid (HA), one fraction of humic substances, on MICP. For this purpose, the effects of HA content on CaCO3 precipitation using three strains and on CaCO3 morphology were examined. The results showed that native species in organic soils were less adversely affected by HA addition than the exogenous one. Another interesting finding is that bacteria seem to have strategies to cope with harsh conditions with HA. Observation of CaCO3 morphology revealed that the crystallization process was hindered by HA to some extent, producing lots of fine amorphous precipitates and large aggregated CaCO3. Overall, this study could provide an insightful understanding of possible obstacles when using MICP to stabilize organic soils.
資源タイプ	学術雑誌論文
出版タイプ	Accepted Manuscript
権利情報	This version of the article has been accepted for publication, after peer review (when applicable) and is subject to Springer Nature’s AM terms of use, but is not the Version of Record and does not reflect post-acceptance improvements, or any corrections. The Version of Record is available online at: http://10.1007/s11356-022-23157-8
PISSN	0944-1344
関連情報 (isVersionOf)	出版社版DOI https://doi.org/10.1007/s11356-022-23157-8