Surface complexation modeling of arsenic mobilization from goethite:Interpretation of in-situ experiments in a sedimentary basin of Inner Mongo1ia China

摘要

We present and compare conceptual and numerical modeling approaches for a quantitative interpreatation of in-situ experiments that consisted in monitoring the temporal change of adsorbed-As concen-tration by incubating As-loaded goethite coated sand in the groundwater.We employed the diffuse double layer (DDL)and charge distribution multisite complexation (CD-MUSIC) models to simulate the measured As-sorbed concentration and to investigate the effects of multicomponent adsorption processes on As mobility.