Hydrogeochemical Characterization and Assessment of Contamination by Inorganic and Organic Matter in the Groundwater of a Volcano-Sedimentary Aquifer

de, Reyna María Guadalupe Fonseca-Montes; Ramos-Leal, José Alfredo; Morán-Ramírez, Janete; Martínez, Juan Manuel Esquivel; Álvarez-Bastida, Carolina; Fuentes-Rivas, Rosa María

doi:10.1007/s00128-020-02819-8

Cited by 8 publications

(2 citation statements)

References 35 publications

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“…The polluting species found in groundwater are heavy metals such as arsenic, cadmium, cobalt, chromium, lead, fluoride ions, nitrogenous organic material, inorganic phosphate material, and aromatic proteins. Therefore, the present study aimed to evaluate groundwater quality and identify the hydrogeochemical processes in the aquifer near an unregulated municipal landfill [6][7][8]27].…”

Section: Study Areamentioning

confidence: 99%

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Assessment of Physicochemical Groundwater Quality and Hydrogeochemical Processes in an Area near a Municipal Landfill Site: A Case Study of the Toluca Valley

Dávalos-Peña

Fuentes-Rivas

de³

et al. 2021

IJERPH

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Sanitary landfills are considered one of the main sources of contamination of water resources due to the generation of leachate with a high content of dissolved organic matter (DOM), inorganic material, and toxic elements. This study aimed to determine the influence of leachate on the physicochemical quality and hydrogeochemical processes which determine the chemical composition of groundwater in an area near a municipal sanitary landfill site. In situ parameters (pH, temperature, electrical conductivity, dissolved oxygen, ORP), physicochemical parameters (HCO3−, PO43−, Cl−, NO3−, SO42−, NH4+, Ca2+, Mg2+, Na+, K+), and dissolved organic matter were analyzed. The content of dissolved organic matter (DOM) was determined by 3D fluorescence microscopy. The presence of Cl−, NO3−, NH4+, PO43−, BOD, and COD indicated the presence of contamination. The significant correlation between NO3− and PO43− ions (r = 0.940) and DOM of anthropogenic origin in the 3D fluorescence spectra confirm that its presence in the water is associated with the municipal landfill site in question. The type of water in the area is Mg-HCO3, with a tendency to Na-HCO3 and Na-SO+-Cl. The water-rock interaction process predominates in the chemical composition of water; however, significant correlations between Na+ and Ca2+ (r = 0.876), and between K+ and Mg2+ (r = 0.980) showed that an ion exchange process had taken place. Likewise, there is enrichment by HCO3− and SO42− ions due to the mineralization of the organic matter from the leachate. The groundwater quality that supplies the study area is being affected by leachate infiltration from the sanitary landfill.

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Section: Study Areamentioning

confidence: 99%

“…Currently, the quality of groundwater is a critical environmental problem and is generally evaluated by monitoring dissolved organic matter (DOM) by measuring dissolved organic carbon [4][5][6][7][8][9]. DOM is a parameter that can reflect the contamination of water by organic compounds of anthropogenic origin.…”

Section: Introductionmentioning

confidence: 99%