The Chemistry of Sulfide with Olefinic Acids in the Presence of Pertechnetate

Groundwater contamination by 99Tc may pose a threat to the biosphere. Immobilization of pertechnetate by converting it to insoluble Tc2S7 via the injection of hydrogen sulfide gas may mitigate this threat. Other chemicals in the environment, however, interfere with the formation of Tc2S7 from pertechnetate and sulfide, in particular, olefinic acids. We identify some of the products of the reaction of sulfide with olefinic acids in the presence of pertechnetate, and give a possible explanation for their formation.