%0 Conference Paper %F Poster %T Occurrence of arsenic and selenium in aquifers used to produce drinking water near Orleans, France: indices of active biogeochemical processes %+ Bureau de Recherches Géologiques et Minières (BRGM) (BRGM) %A Thouin, Hugues %A Cary, Lise %A Charron, Mickael %A Joulian, Catherine %A Klinka, Thomas %A Battaglia-Brunet, Fabienne %< avec comité de lecture %B 24th International Symposium on Environmental Biogeochemistry - ISEB 2019 %C Potsdam, Germany %8 2019-09-22 %D 2019 %Z Computer Science [cs]/BiotechnologyPoster communications %X Survey of 26 drinking water wells selected in the whole region Arsenic and selenium are both toxic elements whose concentration should not exceed 10 µg/L in drinking water. Their mobility and toxicity, depending on their speciation, is often driven by microbial reactions. In an area of approximately 5000 km 2 around Orleans (Val de Loire, France), occurrence of arsenic and/or selenium above the drinking water standards imposes application of treatment strategies in several localities. %G English %2 https://brgm.hal.science/hal-02156336/document %2 https://brgm.hal.science/hal-02156336/file/posterISEB2019_SelenAsV1_final.pdf %L hal-02156336 %U https://brgm.hal.science/hal-02156336 %~ BRGM %~ BRGM-DO