Arsenic speciation in titanium dioxide (TiO2) waste produced via drinking water filtration: Potential environmental implications for soils, sediments, and human health oleh Amanda Jo Zimmerman, Danira Garcia Gutierrez, Virginia Montero Campos, David C. Weindorf, Sanjit K. Deb, Sharon Ulate Chacón, Gautier Landrot, Nolber Gerardo Gonzalez Flores, Matthew G. Siebecker