A two-step biosorption methodology for efficient and rapid removal of Fe(II) following As(V) from aqueous solution using abundant biomaterials

An innovative methodology was implemented for removing arsenic from aqueous solution by developing successive biosorption experiments. Considering the high affinity of As oxyanions toward Fe(III) oxides, Fe(II) first conducted using nine biomaterials—aquatic and terrestrial invasive species, biowastes, local plants. Pistia stratiotes, an alien species presenting highest concentration adsorbed Fe(II), selected a detailed investigation As(V) removal wastewater. After oxidation biosorbent into Fe(III), it yielded to 92% efficiency determined GFAAS excellent maximum capacity 5.1 mg.g−1. The characterized MP-AES HRTEM-EDX. adsorption mechanisms iron have been studied via theoretical models Langmuir isotherms pseudo-second-order kinetics revealed linearity highlighted robustness method. These promising results were developed build pilot Russec river (Orbiel Valley, France), polluted with arsenic.