ArticleEnvironmental science and pollution research international2021
Lab-scale evaluation of the microbial bioremediation of Cr(VI): contributions of biosorption, bioreduction, and biomineralization.
Article in Environmental science and pollution research international, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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Who cites it
3 citing papers in PubMed.
- Integrated biosorption and bioreduction of hexavalent chromium using Fusarium species under optimized process parameters.Scientific reports · 2026Article
- Influencing Factors of Hexavalent Chromium Speciation Transformation in Soil from a Northern China Chromium Slag Site.Molecules (Basel, Switzerland) · 2025Article
- Effect of TOC Concentration of Humic Substances as an Electron Shuttle on Redox Functional Groups Stimulating Microbial Cr(VI) Reduction.International journal of environmental research and public health · 2022Article
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8 authors.
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Abstract
Bioremediation of Cr(VI) by microorganisms has attracted immense research interests. There are three different mechanisms for bioremediation of Cr(VI): biosorption, bioreduction, and biomineralization. Identifying the relative contributions of these different mechanisms to Cr(VI) bioremediation can provide valuable information to enhance the final result. This article explores the corresponding contributions of different mechanisms in the Cr(VI) bioremediation process. To obtain a deeper understanding of each bioremediation mechanism, the corresponding precipitation products were analyzed via different methods. Fourier transform infrared spectrometer (FTIR) analysis showed that Cr(VI) was adsorbed by functional groups in EPS to form a chelate compound. X-ray photoelectron spectroscopy (XPS) and X-ray diffraction (XRD) analysis determined that the stable Cr(III) compounds and mineral crystals which contain chromium gradually formed during the bioremediation process. High-throughput sequencing technology was applied to monitor microbial community succession. The results showed that the total removal rate of Cr(VI) reached 77.64% in 56 days in 100 mg/L Cr(VI). Bioreduction was the major contributor to the final result, followed by biosorption and biomineralization; their proportions are 69.61%, 19.16%, and 11.23%, respectively. Besides, the high-throughput sequencing data indicated that reductive microorganisms were the dominant flora and that the relative abundance of different reductive microorganism types changes significantly. This work has clarified the contributions of different mechanisms during Cr(VI) bioremediation process and provided a new enhancement strategy for Cr(VI) bioremediation.Graphical abstract.
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