What could be the possible reasons of positive correlations of alkalinity with sulphate and zinc?

24 June 2023 1 689 Report

This correlation was found in the river water samples collected during the two years of sampling.

The reason may be that both Zn SO42- and alkalinity have the same source. Alkalinity is often controlled by HCO3-, which comes, for example, from lime, CaCO3. Which in turn originates from weathering. The geology of the catchment area will be interesting. Are there zinc minerals there? Industrial effluents can also be a source. If they use both zinc and alkalis.

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