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- W3203233679 endingPage "132363" @default.
- W3203233679 startingPage "132363" @default.
- W3203233679 abstract "Nanomaterials have great application potential for the remediation of heavy metal contaminated sediments, but their environmental impacts are still limited. Herein, graphene oxide-supported nanoscale zero-valent iron (GNZVI) was synthesized to explore its role in mediating the immobilization of cadmium (Cd) from contaminated river sediments, with the consideration of the potential impacts on sediment enzyme activities and bacterial community. Compared to NZVI and GO, GNZVI could more effectively promote the transformation of mobile Cd into stable speciation with a maximum residual percentage increasing by 64.82% after 56 days of treatment. The activities of urease, catalase and sucrase were gradually increased and stabilized with the prolongation of treatment time, indicating that the metabolic function of sediments was recovered. 16 S rRNA gene sequencing results confirmed that the application of GNZVI increased the abundance of some Fe(III)-reducing bacteria, further stimulating the bioavailability of organic matter. Additionally, the properties of GO were gradually changed via microbial reduction and finally showed similar properties to rGO. The critical role of rGO as an electrical conductor was to promote the electron transfer process of microbial Fe(III) mineral reduction, which redistributes part of the Fe(III) mineral-associated Cd to more stable secondary iron minerals, thereby further improving the stabilization efficiency of r-GNZVI for Cd." @default.
- W3203233679 created "2021-10-11" @default.
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- W3203233679 date "2022-01-01" @default.
- W3203233679 modified "2023-10-14" @default.
- W3203233679 title "Stabilization of cadmium in contaminated sediment based on a nanoremediation strategy: Environmental impacts and mechanisms" @default.
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- W3203233679 doi "https://doi.org/10.1016/j.chemosphere.2021.132363" @default.
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- W3203233679 hasPublicationYear "2022" @default.
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