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Performance of Heavy Metal-immobilizing Bacteria Combined with Biochar on Remediation of Cadmium and Lead Co-contaminated Soil by Ting Wei; Han Gao; Fengqiu An; Xiulian Ma; Li Hua; Junkang Guo is a Environmental Science article available to read on EtoBox.

What is Performance of Heavy Metal-immobilizing Bacteria Combined with Biochar on Remediation of Cadmium and Lead Co-contaminated Soil about?

Heavy metal pollution of soil has become a public concern worldwide since it threats food safety and human health. Sustainable and environmental-friendly remediation technology is urgently needed. Therefore, we investigated the properties and heavy metal removal ability of Enterobacter asburiae G3 (G3), Enterobacter tabaci I12 (I12), and explored the feasibility of remediation Cd, Pb co-contaminated soil by the combination of G3/I12 and biochar. Our results indicated that both strains are highly resistant to Cd, Pb and maintain plant growth-promoting properties. The removal efficiency of G3 for Cd and Pb were 76.79-99.43%, respectively, while the removal efficiency of I12 for Cd and Pb were 62.57-99.55%, respectively. SEM-EDS and XRD analysis revealed that the morphological and structural changes occurred upon heavy metal exposure, metal precipitates were also detected on cell surface. FTIR analysis indicated that functional groups (-OH, -N-H, -C = O, -C-N, -PO 4 ) were involved in Cd/Pb immobilization. Application of the bacteria, biochar, or their combination decreased the acid-extractable Cd, Pb in soil while increased the residual fractions, meanwhile, the bioavailability of bo

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Author

Ting Wei; Han Gao; Fengqiu An; Xiulian Ma; Li Hua; Junkang Guo

Publisher

Springer Science and Business Media LLC

Published

2023

Language

EN

Field

Environmental Science (Physical Sciences)