数字农科院2.0

Multiple Heavy Metal Tolerance And Removal By An Earthworm Gut Fungus Trichoderma Brevicompactum Qycd-6

文献类型： 外文期刊

作者： Zhang, D; Yin, CP; Abbas, N; Mao, ZC; Zhang, YL

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期刊名称： SCIENTIFIC REPORTS

ISSN： 2045-2322

年卷期： 2020 年 10 卷 1 期

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收录情况： JCR（2021版）

摘要： Fungal bioremediation is a promising approach to remove heavy-metal from contaminated water. Present study examined the ability of an earthworm gut fungus Trichoderma brevicompactum QYCD-6 to tolerate and remove both individual and multi-metals. The minimum inhibitory concentration (MIC) of heavy metals [Cu(II), Cr(VI), Cd(II) and Zn(II)] against the fungus was ranged 150-200mgL(-1) on composite medium, and MIC of Pb(II) was the highest with 1600 mg L-1 on potato dextrose (PD) medium. The Pb(II) presented the highest metal removal rate (97.5%) which mostly dependent on bioaccumulation with 80.0%, and synchronized with max biomass (6.13gL(-1)) in PD medium. However, on the composite medium, the highest removal rate was observed for Cu(II) (64.5%). Cellular changes in fungus were reflected by TEM analysis. FTIR and solid-state NMR analyses indicated the involvement of different functional groups (amino, carbonyl, hydroxyl, et al.) in metallic biosorption. These results established that the earthworm-associated T. brevicompactum QYCD-6 was a promising fungus for the remediation of heavy-metal wastewater.

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