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dc.contributor Aird, Hannah
dc.contributor.advisor Monohan, Carrie
dc.contributor.author Graham, Nicholas
dc.contributor.other Brown, David L.
dc.contributor.other Matiasek, Sandrine
dc.date.accessioned 2018-02-19T21:38:38Z
dc.date.available 2018-02-19T21:38:38Z
dc.date.issued 2018-02-19
dc.identifier.uri http://hdl.handle.net/10211.3/200129 en
dc.description.abstract This study was conducted to assist Nevada Irrigation District (NID) in the analysis of a sediment and mercury removal treatment process at the Lake Combie Reservoir, Grass Valley CA. Part of the removal process consisted of administering metal-based coagulants to promote the sedimentation of fine grain materials. Field-scale tests resulted in process effluent below regulatory criteria for total metal concentrations including mercury (Hg), chromium (Cr), iron (Fe), magnesium (Mg), molybdenum (Mo), nickel (Ni), and zinc (Zn). Additional sediments from future sites (Combie Lake and Greenhorn Creek) and alternative coagulants (LBP-2101 and Clar+Ion 5057) were tested in the sedimentation process. Furthermore, prediction models for continuous real time total mercury (THg) and filtered mercury (fHg) concentrations during the sedimentation treatment process are presented. The models use the parameters; total suspended solids (TSS), total dissolved solids (TDS), and ultraviolet absorbance (A254) as proxies for THg and fHg concentrations. The multivariate regression models had R2 values of 0.97 and 0.85 for the prediction of THg and fHg, and p-values <0.0001. Continuous monitoring of these proxies at pre- and post-treatment locations coupled with the predictive capabilities of the models suggest that full scale implementation of the sediment and mercury removal process at Lake Combie Reservoir can operate within regulatory criteria with the ability to identify an exceedance before effluent is released. en_US
dc.description.sponsorship CSU, Chico en_US
dc.language.iso en_US en_US
dc.subject Sediment removal en_US
dc.subject Mercury removal en_US
dc.title Metal-based coagulant effect on sediment slurry for the Lake Combie Reservoir Sediment and Mercury Removal Project, Grass Valley, CA en_US
dc.college Natural Sciences en_US
dc.program Geosciences en_US
dc.degree MA en_US
dc.degree.option Hydrology/Hydrogeology en_US

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