Molybdenum Release Triggered by Dolomite Dissolution: Experimental Evidence and Conceptual Model.

ABSTRACT: The injection of oxygenated water into anoxic aquifers during managed aquifer recharge (MAR) can cause the mobilization of metal(loid)s. Here, we study the processes controlling MAR-induced molybdenum (Mo) release in dolomitic aquifers. Sequential chemical extractions and energy dispersive X-ray spectroscopy combined with scanning electron microscopy point to an association of Mo with easily soluble sulfurized organic matter present in intercrystalline spaces of dolomites or directly incorporated within dolomite crystals. The easily soluble character was confirmed by a batch experiment that demonstrated the rapid mobilization of Mo, dissolved organic carbon, and sulfur. The type and time of batch solution contact with the sulfurized organic matter impacted the release of Mo, as demonstrate

SUBMITTER: Koopmann S 

PROVIDER: S-EPMC9454249 | biostudies-literature | 2022 Sep

REPOSITORIES: biostudies-literature