Biogeochemical Mechanisms of HCO3-Ca Water and NO3- Pollution in a Typical Piedmont Agricultural Area: Insights from Nitrification and Carbonate Weathering.

Toxics · 2025 · PMC12115938 · PMID 40423473

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an overall trendno p-value reported

As shown in Figure S3a , the δ 18 O-H 2 O/δ 2 H-H 2 O values of all samples fell below the global meteoric water line (GMWL, δ 2 H-H 2 O = 8δ 18 O-H 2 O + 10) [ 43 ], indicating an overall trend of evaporation.

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may be significantno p-value reported

In addition to natural carbonate dissolution, the contribution of agricultural acid (i.e., HNO 3 ) to the equilibrium/supersaturated state of calcite dissolution may be significant due to the large agricultural NH 4 + inputs in the study area [ 28 ], which can accelerate the rate of dissolution from carbonate rocks, thereby improving the equilibrium/supersaturated state of calcite dissolution. 4.2.3.

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Quoted from the open-access full text in Europe PMC under the licence the publisher applied. The sentence is reproduced exactly as published; the emphasis is ours.

Biogeochemical Mechanisms of HCO&lt;sub&gt;3&lt;/sub&gt;-Ca Water and NO&lt;sub&gt;3&lt;/sub&gt;&lt;sup&gt;-&lt;/sup&gt; Pollution in a Typical Piedmont Agricultural Area: Insights from Nitrification and Carbonate Weathering.

The sentences

Biogeochemical Mechanisms of HCO<sub>3</sub>-Ca Water and NO<sub>3</sub><sup>-</sup> Pollution in a Typical Piedmont Agricultural Area: Insights from Nitrification and Carbonate Weathering.