Linking Microbial Communities and Molecular Transformations of Dissolved Organic Matter to the Fate of Nitrogen in Karst Aquifers

Physiochemical parameters, optical parameters, and molecular characteristics of DOM in different karst aquifer media (fissure groundwater, conduit groundwater, surface water) derived from EEM, PARAFAC, and FT-ICR MS analysis. The average values of indices based on FT-ICR MS data here are all calculated as intensity-weighted average (e.g., H/Cwa, O/Cwa, DBEwa, NOSCwa, and (AImod)wa).

本研究通过环境.executor方法、PARAFAC分解和飞行时间-质谱（FT-ICR MS）分析，对不同喀斯特含水介质（裂隙地下水、管道地下水、地表水）中溶解性有机物（DOM）的物化参数、光学参数及分子特性进行了深入探究。基于FT-ICR MS数据的指数平均值均以强度加权平均计算得出，例如，H/Cwa、O/Cwa、DBEwa、NOSCwa以及（AImod）wa等。