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Gilabert-Alarcon, C. ; Daessle, L.W.* ; Salgado-Mendez, S.O.* ; Perez-Flores, M.A.* ; Knoeller, K.* ; Kretzschmar, T.G.* ; Stumpp, C.

Effects of reclaimed water discharge in the Maneadero coastal aquifer, Baja California, Mexico.

J. Virol. 92, 121-139 (2018)

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Since 2014, reclaimed water has been used for agricultural irrigation and it has been discharged on a riverbed of the Maneadero aquifer, Baja California, Mexico. To determine the effects of reclaimed water on groundwater quality, samples of reclaimed water and groundwater were collected spatiotemporal and analyzed using stable isotope (δ18OH2O, δ2HH2O, δ18ONO3and δ15NNO3) and geochemical signatures, jointly with multivariate statistical methods and a 2D resistivity tomography. Reverse ion exchange and mineralization are the main processes influencing the groundwater composition. The Cl/Br ratios identified seawater intrusion and solid waste, wastewater and animal waste as the main sources responsible for these processes, overlapping with the ratios of reclaimed water. Nitrates are pervasive throughout the aquifer and δ18ONO3and δ15NNO3attributed wastewater and animal waste as the major nitrates inputs. Multivariate statistics were able to separate seawater and human-derived processes. The δ18OH2Oand δ2HH2Oshowed the effect of mixing with d-excess of 5–6‰, indicating recharge other than precipitation. A mixing model using Cl−and δ18OH2Oand principal components revealed the mixing proportion of seawater; whilst the over- and under-estimates of reclaimed water contribution are indicative of missing end-members. The Na-Cl-Br-B systematics, however, suggest that reclaimed water result in cation-exchange and adsorption reactions and once the adsorbed sites become saturated with respect of Na+, Br−and B−can be reflected in the groundwater composition. Additionally, resistivities indicate that reclaimed water interacts between the fresh and brackish groundwater. Monitoring the efficiency of the vadose zone to retain contaminants and distinguish them from reclaimed water is essential for evaluating groundwater quality.

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Publication type Article: Journal article

Document type Scientific Article

Corresponding Author

Keywords Coastal Aquifers ; Groundwater Quality ; Hydrochemical Processes ; Reclaimed Water ; Salinization; Pml Nuclear-bodies; Monoclonal-antibodies; E1b-55k Oncoprotein; Messenger-rna; E3 Ligase; Dependent Degradation; 55-kilodalton Protein; Transformed-cells; Cellular-proteins; E1b55k Proteins

ISSN (print) / ISBN 0022-538X

e-ISSN 1098-5514

Journal Journal of Virology

Quellenangaben Volume: 92, Pages: 121-139

Publisher American Society for Microbiology (ASM)

Publishing Place 1752 N St Nw, Washington, Dc 20036-2904 Usa

Non-patent literature Publications

Reviewing status Peer reviewed

Institute(s) Institute of Groundwater Ecology (IGOE)