For an N-protic acid–base system, the set of nonlinear equations (i.e., mass action and balance laws) provides a simple analytical solution/formula for any integer N ? 1. The approach is applicable general case zwitterionic acids HNA+Z (e.g., amino acids, NTA, EDTA), which includes (i) “ordinary acids” as special (Z = 0) (ii) surface complexation. Examples are presented 1 to 6. high-N perspecti...

Numerous geothermal resources of medium to low temperature have been reported in southern China. Suichuan County is one the regions where thermal manifestations are abundant. However, study regarding understanding water sources, hydrochemical composition and fluid-rock interaction lacks behind. Therefore, this has characterized slightly acidic alkaline bicarbonate waters medium-low area. Geothe...

The paper provides characteristics of small rivers water chemical composition in the Vyazemsky area. assumption is made that river waters were polluted by biogenic and organic nutrients due to discharge untreated domestic wastewater.

Regional stream water geochemistry acquired as part of the Tellus programme in Ireland has been analysed to assess its potential for application environmental assessment and mineral exploration. Interpolated geochemical maps multivariate statistical analysis, including principal component analysis random forest classification, demonstrate broad geogenic control chemistry, with both bedrock subs...

Accurate identification of nitrate (NO3−) sources is critical to addressing groundwater pollution, especially in highly vulnerable karst aquifers. The hydrochemistry and δ15NNO3 δ18ONO3 isotopes were analyzed samples taken from the Jinan Spring Catchment, which has been affected by urbanization agricultural activities. study highlighted use hydrochemistry, environmental isotopes, a multisource ...