Reducing arsenic toxicity using the interfacial oxygen nanobubble technology for sediment remediation

Simple item page
dc.contributor.authorTang, Ying
dc.contributor.authorZhang, Meiyi
dc.contributor.authorZhang, Jing
dc.contributor.authorLyu, Tao
dc.contributor.authorCooper, Mick
dc.contributor.authorPan, Gang
dc.date.accessioned2021-09-17T09:17:14Z
dc.date.available2021-09-17T09:17:14Z
dc.date.issued2021-09-11
dc.description.abstractThe arsenic (As)-bearing eutrophic waters may suffer from the dual conditions of harmful algal blooms and release of As, driven by algal-induced hypoxia/anoxia. Here, we investigate the use of interfacial oxygen (O2) nanobubble technology to combat the hypoxia and control As exposure in simulated mesocosm experiments. It was observed that remediation of algal-induced hypoxia at the sediment-water interfaces (SWI) by application of O2 nanobubbles reduced the level of dissolved As from 23.2 μg L−1 to <10 μg L−1 and stimulated the conversion of As(III) to the less toxic As(V) (65–75%) and methylated As (10–15%) species. More than half of the oxidation and all the methylation of As(III) resulted from the manipulation by O2 nanobubbles of microbes responsible for As(III) oxidation and methylation. Hydroxyl radicals were generated during the oxidation of reductive substances at the SWI in darkness, and should be dominant contributors to As(III) abiotic oxidation. X-ray absorption near-edge structure (XANES) spectroscopic analysis demonstrated that surface sediments changed from being sources to acting as sinks of As, due to the formation of Fe-(hydr)oxide. Overall, this study suggests that interfacial O2 nanobubble technology could be a potential method for remediation of sediment As pollution through the manipulation of O2-related microbial and geochemical reactionsen_UK
dc.identifier.citationTang Y, Zhang M, Zhang J, et al., (2021) Reducing arsenic toxicity using the interfacial oxygen nanobubble technology for sediment remediation. Water Research, Volume 205, 15 October 2021, Article number 117657en_UK
dc.identifier.issn0043-1354
dc.identifier.urihttps://doi.org/10.1016/j.watres.2021.117657
dc.identifier.urihttp://dspace.lib.cranfield.ac.uk/handle/1826/17084
dc.language.isoenen_UK
dc.publisherElsevieren_UK
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/*
dc.subjectHydroxyl radicalsen_UK
dc.subjectArsenic metabolism functional genesen_UK
dc.subjectHypoxia remediationen_UK
dc.subjectNanobubbleen_UK
dc.subjectArsenic oxidationen_UK
dc.subjectEutrophic watersen_UK
dc.titleReducing arsenic toxicity using the interfacial oxygen nanobubble technology for sediment remediationen_UK
dc.typeArticleen_UK

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
Reducing_arsenic_toxicity-2021.pdf
Size:
10.09 MB
Format:
Adobe Portable Document Format
Description:
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.63 KB
Format:
Item-specific license agreed upon to submission
Description:
Download

Collections

Staff publications (SWEE)