Monitoring nitrate reduction: hydrogeochemistry and clogging potential in raw water wells.
dc.contributor.author | Ortmeyer, F. | |
dc.contributor.author | Volkova, K. | |
dc.contributor.author | Wisotzky, F. | |
dc.contributor.author | Wohnlich, S. | |
dc.contributor.author | Banning, Andre | |
dc.date.accessioned | 2021-11-24T14:20:45Z | |
dc.date.available | 2021-11-24T14:20:45Z | |
dc.date.issued | 2021-02-05 | |
dc.date.updated | 2021-11-23T15:12:36Z | |
dc.description.abstract | The mainly agricultural input of NO3- and compliance with drinking water guideline values pose major challenges for many water suppliers. Additionally, associated changes in hydrochemistry, especially concerning products of NO3- reduction (Fe2+/3+, Mn2+/4+, Ca2+, Mg2+, SO42-, HCO3-) and subsequent reactions, can have a major influence on mineral saturation states and well yield: well productivity can be strongly reduced by mineral precipitation and silting. To evaluate hydrogeochemical evolution and clogging potential for a given well field, thorough hydrochemical and geochemical investigations are required. Therefore, time-dependent and depth-specific ion concentrations in water samples (n = 818) were analysed in a catchment area of a waterworks in western Germany. The sediments of the aquifers were extensively investigated for their geochemistry (CS, scanning electron microscope, aqua regia digestion and dithionite solution; n = 253). In addition, PhreeqC was used to model saturation indices in order to identify possible mineral precipitation in the wells. Results show a high NO3- input into deep wells screened in Tertiary sediments due to an admixture of Quaternary groundwater. Directly at the Quaternary-Tertiary boundary, chemolithotrophic NO3- reduction consuming pyrite occurs. Protons released during the process are pH-buffered by dissolving carbonate minerals. Overall, the hydrochemistry and especially the saturation indices are strongly influenced by NO3- reduction and its degradation products. A change in well yield has not yet been observed, but future clogging by ochre formation or sintering cannot be excluded. | en |
dc.description.sponsorship | Open Access funding enabled and organized by Projekt DEAL | en |
dc.description.status | Peer reviewed | en |
dc.description.version | Published Version | en |
dc.format.mimetype | application/pdf | en |
dc.identifier.articleid | 112 | en |
dc.identifier.citation | Ortmeyer, F., Volkova, K., Wisotzky, F., Wohnlich, S. and Banning, A. (2021) ‘Monitoring nitrate reduction: hydrogeochemistry and clogging potential in raw water wells’, Environmental Monitoring and Assessment , 193, 112 (17 pp). doi: 10.1007/s10661-021-08880-y | en |
dc.identifier.doi | 10.1007/s10661-021-08880-y | en |
dc.identifier.endpage | 17 | en |
dc.identifier.issn | 1573-2959 | |
dc.identifier.issued | 3 | en |
dc.identifier.journaltitle | Environmental Monitoring and Assessment | en |
dc.identifier.startpage | 1 | en |
dc.identifier.uri | https://hdl.handle.net/10468/12260 | |
dc.identifier.volume | 193 | en |
dc.language.iso | en | en |
dc.publisher | Springer | en |
dc.relation.uri | https://link.springer.com/article/10.1007%2Fs10661-021-08880-y | |
dc.rights | © The Authors 2021. Open Access. This article is licensed under a Creative Commons Attribution 4.0 International License | en |
dc.rights.uri | http://creativecommons.org/licenses/by/4.0/ | en |
dc.subject | Hydrochemistry | en |
dc.subject | Nitrate degradation | en |
dc.subject | Well clogging | en |
dc.subject | Admixture | en |
dc.subject | Germany | en |
dc.title | Monitoring nitrate reduction: hydrogeochemistry and clogging potential in raw water wells. | en |
dc.type | Article (peer-reviewed) | en |
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