Release of geogenic fluoride from contaminated soils of Rajasthan, India: experiments and geochemical modeling

Simple item page
dc.contributor.authorThakur, Bhawna
dc.contributor.authorLoganathan, Vijay A.
dc.contributor.authorSharma, Anupma
dc.contributor.authorSharma, Rakesh K.
dc.contributor.authorParker, Alison
dc.date.accessioned2023-07-27T08:08:05Z
dc.date.available2023-07-27T08:08:05Z
dc.date.issued2023-07-12
dc.description.abstractManagement of groundwater contaminants, that are primarily of geogenic origin, such as fluoride, is a major public health concern. Worldwide, around 200 million people are dependent on drinking water resources that contain elevated levels of fluoride that exceeds WHO’s drinking water threshold limit of 1.5 mg/L. According to the Ministry of Drinking Water and Sanitation of India, about 11.7 million people, mostly in the Rajasthan state, are exposed to high fluoride risk. It is important to understand the soil–water interaction mechanisms to properly assess the fluoride contamination that are primrily due to geogenic origins prevalent in the region. In this study, batch desorption experiments were performed with soils obtained from varied depths at two sites in Rajasthan that has high fluoride levels in groundwater. The fluoride release kinetics followed a pseudo first-order kinetic model. The results of the batch experiments indicate higher release of fluoride from lower soil layers when compared to the upper layers. Further, the release of fluoride was dependent on pH wherein higher release was noticed under basic pH. Since the natural pH of the soils from this region is ca. pH 8 it is expected to play a vital role in the continued release of fluoride to the groundwater system. Furthermore, a simplified geochemical model, incorporating a general composite approach, has been used to simulate the experimental results that include dissolved Al and Al-F surface complexes. The model was able to capture the observed experimental results for various soils within a reasonable RMSE of 11.74%. The results of this study not only further the current understanding of the fate and transport mechanisms of fluoride in the contaminated subsurface but also would aid in designing remedial strategies to ensure future water security in this region.en_UK
dc.identifier.citationThakur B, Loganathan VA, Sharma A, et al., (2023) Release of geogenic fluoride from contaminated soils of Rajasthan, India: experiments and geochemical modeling, Water Security, Volume 19, August 2023, Article Number 100140en_UK
dc.identifier.issn2468-3124
dc.identifier.urihttps://doi.org/10.1016/j.wasec.2023.100140
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/20033
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.subjectFluoride pollutionen_UK
dc.subjectDesorption kineticsen_UK
dc.subjectGeochemical modelingen_UK
dc.subjectSurface complexationen_UK
dc.subjectRajasthanen_UK
dc.titleRelease of geogenic fluoride from contaminated soils of Rajasthan, India: experiments and geochemical modelingen_UK
dc.typeArticleen_UK

Files

Original bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
Release_of_geogenic_fluoride-2023.pdf
Size:
3.07 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)