One factorial ANOVA in assessment of groundwater quality in vulnerable area of agriculture pollution

Kovacevik, Biljana and Mitrev, Sasa and Boev, Ivan and Markova Ruzdik, Natalija and Boev, Blazo (2021) One factorial ANOVA in assessment of groundwater quality in vulnerable area of agriculture pollution. Journal of Agriculture and Plant Science, 19 (2). ISSN 2545-4455 (In Press)

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Abstract

Arsenic polluted groundwater was found in the Strumica region located in the south-east part of the Republic of Macedonia where an intensive agriculture production is concentrated on the area of around 1000 km2. Out of 185 samples collected from boreholes, 64 samples have arsenic in concentrations greater than 10 µg/L, from which 30 samples have a concentration greater than 50 µg/L with a maximum concentration of 176.56 µg/L. Pollution mostly occurs in the groundwater located in the central part of the valley characterized by alluvial plains and young aquifer. Around 57% of the polluted samples have origin from deep groundwater with a depth greater than 40 m. Reductive environment, high Fe, Mn, HCO3- concentrations as well as low SO42- and NO3- content in polluted samples suggests that reductive dissolution is a major mechanism by which arsenic is released into the groundwater. Highly polluted samples are characterized with high concentrations of Mn and Fe. Other investigated ions are present in low concentrations. One factorial ANOVA showed significant differences between As concentrations in shallow and deep groundwater. Multivariate factor analysis was performed to identify the covariance structure between the investigated variables. Arsenic was positively correlated with HCO3- and Mn in shallow groundwater and with HCO3-, Ca, and Mn in deep groundwater suggesting that arsenic is mobilized in groundwater by reductive dissolution of Mn oxides from the bedrock.

Item Type:	Article
Uncontrolled Keywords:	arsenic, shallow groundwater, deep groundwater, reductive dissolution. arsenic, shallow groundwater, deep groundwater, reductive dissolution.
Subjects:	Natural sciences > Chemical sciences Agricultural Sciences > Other agricultural sciences Natural sciences > Other natural sciences
Divisions:	Faculty of Agriculture
Depositing User:	Biljana Kovacevik
Date Deposited:	23 Nov 2021 12:04
Last Modified:	23 Nov 2021 12:04
URI:	https://eprints.ugd.edu.mk/id/eprint/28818

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