Immobilization of lead in tailings by Bacillus subtilis through microbially induced phosphate precipitation (MIPP)

doi:10.1088/1755-1315/861/7/072020

	Immobilization of lead in tailings by Bacillus subtilis through microbially induced phosphate precipitation (MIPP)
	Han,L J 3,4; Li,J S 2,4; Xue,Q 2,4; Wang,M Q 1,4
刊名	IOP Conference Series: Earth and Environmental Science
	2021-10-01
卷号	861 期号:7
ISSN号	1755-1307
DOI	10.1088/1755-1315/861/7/072020
英文摘要	Abstract The accumulation of heavy metal tailings has raised serious environmental concerns, especially in China. Therefore, remediation and utilization of heavy metal tailings have become urgent and vital. In this paper, an emerging technology MIPP (microbially induced phosphate precipitation) was applied and the commercial Bacillus subtilis were employed to mitigate the Pb contamination risks in tailings. Through aqueous Pb-removal experiments and tailings remediation experiments, the process and mechanism of MIPP treatment for heavy metal tailings were systematically explored. In addition, the optimal Pb-removal conditions were discussed. The results shows that the commercial Bacillus subtilis can be served as a preferable MIPP-stabilization commercial strain with lower application cost, better heavy metal tolerance, and excellent Pb stabilization compared to traditional strains isolated from contaminated sites. The mobile Pb was almost converted into Pb9(PO4)6 through MIPP treatment contributing to the Pb immobilization. According to SPLP (the synthetic precipitation leaching procedure), the leaching concentration of Pb from tailings dropped from 0.86 mg/L before treatment to less than 0.02 mg/L after MIPP remediation, which is far below China’s groundwater environmental requirements (0.1 mg/L). This technology has the advantages of on-site construction and environmental friendliness. The treated tailings are expected to be safely used as construction sand for road base and mine backfilling.
语种	英语
出版者	IOP Publishing
WOS记录号	IOP:EES_861_7_072020
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/28464]
专题	中科院武汉岩土力学所
作者单位	1.School of Urban Construction, Wuhan University of Science and Technology, Wuhan 430065, China 2.IRSM-CAS/HK PolyU Joint Laboratory on Solid Waste Science, Wuhan 430071, China 3.University of Chinese Academy of Science, Beijing 100049, China 4.State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China
推荐引用方式 GB/T 7714	Han,L J,Li,J S,Xue,Q,et al. Immobilization of lead in tailings by Bacillus subtilis through microbially induced phosphate precipitation (MIPP)[J]. IOP Conference Series: Earth and Environmental Science,2021,861(7).
APA	Han,L J,Li,J S,Xue,Q,&Wang,M Q.(2021).Immobilization of lead in tailings by Bacillus subtilis through microbially induced phosphate precipitation (MIPP).IOP Conference Series: Earth and Environmental Science,861(7).
MLA	Han,L J,et al."Immobilization of lead in tailings by Bacillus subtilis through microbially induced phosphate precipitation (MIPP)".IOP Conference Series: Earth and Environmental Science 861.7(2021).