A XAS study of Arsenic speciation at the Carletti Spring System (Viterbo, Italy)

The present study aims at unravelling arsenic (As) speciation in the total suspended particulate (TSP) occurring at the Carletti spring system (CSS), part of the larger Bullicame (Viterbo, Central Italy) system, by means of XAS spectroscopy. Here, As occurs as a geogenic anomaly, and its mobility is affected by inorganic and microbiological processes which can differentiate its speciation and mobility. The determination of As speciation in the TSP, highly diluted samples, is essential to validate the models on the fate of As in this “natural laboratory”.