Section 4: Arsenic remediation and removal technologies. Sorption and chemical styability of As(V) onto tin doped goethites

ANA L. LARRALDE; ANA E. TUFO; ELSA E. SILEO

One Century of the Discovery of Arsenicosis in Latin America (1914-2014)

CRC Press

Lugar: London; Año: 2014; p. 714 - 716

Sorption and chemical stability of As(V) onto tin doped goethites A.L. Larralde; A.E. Tufo; E.E. Sileo. INQUIMAE, DQIADF, Facultad de Ciencias Exactas y Naturales. Intendente Güiraldes 2160, Pabellón 2, Piso 3, CABA (1428) Universidad de Buenos Aires, Argentina. *E-mail: sileo@qi.fcen.uba.ar ABSTRACT: The effect of Sn(IV)-incorporation on the surface properties and on the reactivity in acid media of several goethites was investigated by XRD diffractometry, TG determinations, BET area measurements, As-adsorption isotherms and acid media dissolution. Thermogravimetric measurements indicated the for-mation of metal-deficient goethites. As-adsorbed determinations indicated that the As adsorption onto Sn-goethite duplicates the value of pure goethite. Dissolution experiments showed sigmoidal curves with K rate values that follow the trend GSn0 (0.0110) > GSn2.1 (0.108) > GSn5.5 (0.0089).