Mechanism of dissolution of minium (Pb 3 O 4 ) in water under depleting chlorine conditions
Source abstract
Abstract
Abstract Long-term batch dissolution experiments were performed on solid phase Pb 3 O 4 under drinking water conditions simulating a depleting chlorine regime. Analytical and spectroscopic results indicate Pb 3 O 4 is first dissolved in the presence of chlorine through a nucleophilic attack to the Pb 2+ centers in the solid, and is subsequently oxidized by free chlorine to form β-PbO 2 , with a concomitant decrease in soluble lead concentrations. Following chlorine depletion, Pb 3 O 4 dissolution regulates the process, resulting in surface deposition of β-PbO 2 . Formation of lead carbonates controls the final observed lead concentrations for Pb 3 O 4 dissolution. A dissolution model is presented to rationalize these observations.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Mercury impact and mitigation studies · Water Treatment and Disinfection · Minerals Flotation and Separation Techniques
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