Sugarcane bagasse as support for immobilization of Bacillus pumilus HZ-2 and its use in bioremediation of mesotrione-contaminated soils

Applied Microbiology and Biotechnology
Jie LiuGuohua Zhong

Abstract

The degrading microorganisms isolated from environment usually fail to degrade pollutants when used for bioremediation of contaminated soils; thus, additional treatments are needed to enhance biodegradation. In the present study, the potential of sugarcane bagasse as bacteria-immobilizing support was investigated in mesotrione biodegradation. A novel isolate Bacillus pumilus HZ-2 was applied in bacterial immobilization, which was capable of degrading over 95 % of mesotrione at initial concentrations ranging from 25 to 200 mg L(-1) within 4 days in flask-shaking tests. Scanning electron microscope (SEM) images showed that the bacterial cells were strongly absorbed and fully dispersed on bagasse surface after immobilization. Specially, 86.5 and 82.9 % of mesotrione was eliminated by bacteria immobilized on bagasse of 100 and 60 mesh, respectively, which indicated that this immobilization was able to maintain a high degrading activity of the bacteria. Analysis of the degradation products determined 2-amino-4-methylsulfonylbenzoic acid (AMBA) and 4-methylsulfonyl-2-nitrobenzoic acid (MNBA) as the main metabolites in the biodegradation pathway of mesotrione. In the sterile soil, approximately 90 % of mesotrione was degraded after su...Continue Reading

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Citations

Feb 20, 2018·Frontiers in Microbiology·Hui ZhanShaohua Chen
May 1, 2018·Applied Microbiology and Biotechnology·Hui ZhanShaohua Chen
Nov 26, 2016·Environmental Science and Pollution Research International·Louis CarlesJoan Artigas
Apr 16, 2020·Frontiers in Microbiology·Wenping ZhangShaohua Chen
Jun 9, 2020·Frontiers in Microbiology·Shimei PangShaohua Chen
Aug 21, 2019·Frontiers in Microbiology·Yaohua HuangShaohua Chen
Apr 1, 2020·Frontiers in Microbiology·Yanmei FengShaohua Chen

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