Diamond Publications - Search Results

Search Again...

These results only include publications that have been reviewed and processed by Diamond Light Source. To also view papers that have not yet been processed click here.

You can use the folder icon under Actions to collate papers as required. You can then click on View Folder in the left-hand navigation to review and/or download your folder.

One item found (0 items not approved).

Instruments / Technical Area	Publication Details	Published	Actions
B18-Core EXAFS	The impact of iron nanoparticles on technetium-contaminated groundwater and sediment microbial communities Laura Newsome , Katherine Morris , Adrian Cleary , Nicholas Karl Masters-Waage , Christopher Boothman , Nimisha Joshi , Nick Atherton , Jonathan R. Lloyd Journal Of Hazardous Materials DOI: 10.1016/j.jhazmat.2018.10.008 Diamond Proposal Number(s): [13559] Open Access Show Abstract ▼ Abstract: Iron nanoparticles are a promising new technology to treat contaminated groundwater, particularly as they can be engineered to optimise their transport properties. Technetium is a common contaminant at nuclear sites and can be reductively scavenged from groundwater by iron(II). Here we investigated the potential for a range of optimised iron nanoparticles to remove technetium from contaminated groundwater, and groundwater/sediment systems. Nano zero-valent iron and Carbo-iron stimulated the development of anoxic conditions while generating Fe(II) which reduced soluble Tc(VII) to sparingly soluble Tc(IV). Similar results were observed for Fe(II)-bearing biomagnetite, albeit at a slower rate. Tc(VII) remained in solution in the presence of the Fe(III) mineral nano-goethite, until acetate was added to stimulate microbial Fe(III)-reduction after which Tc(VII) concentrations decreased concomitant with Fe(II) ingrowth. The addition of iron nanoparticles to sediment microcosms caused an increase in the relative abundance of Firmicutes, consistent with fermentative/anoxic metabolisms. Residual bacteria from the synthesis of the biomagnetite nanoparticles were out-competed by the sediment microbial community. Overall the results showed that iron nanoparticles were highly effective in removing Tc(VII) from groundwater in sediment systems, and generated sustained anoxic conditions via the stimulation of beneficial microbial processes including Fe(III)-reduction and sulfate reduction.	Oct 2018

Instruments / Technical Area

Publication Details

Published

Actions

B18-Core EXAFS

The impact of iron nanoparticles on technetium-contaminated groundwater and sediment microbial communities

Laura Newsome , Katherine Morris , Adrian Cleary , Nicholas Karl Masters-Waage , Christopher Boothman , Nimisha Joshi , Nick Atherton , Jonathan R. Lloyd

Journal Of Hazardous Materials

DOI: 10.1016/j.jhazmat.2018.10.008

Diamond Proposal Number(s): [13559]