Effects of Different Carrier Materials on the Degradation of Phenanthrene by Sphingobium sp. PHE3

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Supported by the National Key Research and Development Program of China(Nos. 2020YFC1807000,2019YFC1804400,2019YFC1804203),the National Natural Science Foundation of China(Nos. 42007133,41977137,21906162),and the Natural Science Foundation of Jiangsu Province(No. BK20191107)

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    To explore the effect of different carrier materials on microbial degradation of phenanthrene, the biodegradation of phenanthrene was investigated in the liquid phase by gram-negative bacteria Sphingobium sp. PHE3 immobilized on montmorillonite, goethite and maize straw-derived biochar. The results of scanning electron microscopy showed that there was the largest number of bacteria adhered to the surface of the biochar with the best morphology. The addition of montmorillonite and biochar significantly (P<0.05) improved the degradation rate of phenanthrene by microorganisms, as well as the increase of polysaccharide and protein production in bacterial extracellular polymeric substance (EPS). Nevertheless, there was no obvious effect on phenanthrene biodegradation and EPS production with the addition of goethite. Furthermore, quorum sensing might play a role in biofilm formation. The signal molecules C8-HSL and C12-HSL secreted by PHE3 might mediate the production of EPS and phenanthrene biodegradation to some extent.

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YIN Yuan, SHENG Hongjie, WANG Ziquan, XIANG Leilei, FU Yuhao, BIAN Yongrong, JIANG Xin, WANG Fang. Effects of Different Carrier Materials on the Degradation of Phenanthrene by Sphingobium sp. PHE3[J]. Acta Pedologica Sinica,2023,60(4):1192-1202.

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  • Received:February 22,2022
  • Revised:April 20,2022
  • Adopted:June 23,2022
  • Online: July 12,2022
  • Published: July 28,2023