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- W4365143927 endingPage "129513" @default.
- W4365143927 startingPage "129513" @default.
- W4365143927 abstract "Although degradation of phosphorus-containing natural organic matter (NOM) is an important process associated with geogenic phosphorus (P) enrichment, the detailed mechanism underlying the association remains unclear. Herein, we used molecular characteristics of P-containing dissolved organic matter (DOM) coupled with hydrogeochemistry and carbon isotopes to unravel this controlling mechanism. Results indicate that P-containing DOM is indeed an important factor controlling groundwater P enrichment. Further, one-P-atom (1P) and two-P-atom (2P) compounds were widely detected. Compared to 1P compounds, 2P compounds have greater numbers of N/S-containing compounds; smaller proportions of highly unsaturated and aliphatic compounds; larger proportions of polyphenols and polycyclic aromatics; lower H/C and nominal oxidation state of carbon (NOSC) values; and higher m/z, O/C, P/C, N/C, double bond equivalents (DBE), and modified aromaticity index (AImod) values. At the molecular level, P-containing DOM degradation overall results in an increase in H/C and a decrease in O/C, and a processing gradient is observed from 2P to 1P compounds, during which dissolved inorganic phosphorus (DIP) was gradually accumulated and retained, eventually becoming the predominating P pool in groundwater. To our knowledge, this is the first study to reveal geogenic P enrichment from a molecular perspective in groundwater systems worldwide." @default.
- W4365143927 created "2023-04-13" @default.
- W4365143927 creator A5001342446 @default.
- W4365143927 creator A5025546406 @default.
- W4365143927 creator A5045579735 @default.
- W4365143927 creator A5071392824 @default.
- W4365143927 creator A5083417541 @default.
- W4365143927 date "2023-05-01" @default.
- W4365143927 modified "2023-10-18" @default.
- W4365143927 title "Degradation of phosphorus-containing natural organic matter facilitates enrichment of geogenic phosphorus in Quaternary aquifer systems: A molecular perspective" @default.
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- W4365143927 doi "https://doi.org/10.1016/j.jhydrol.2023.129513" @default.