Efficient and selective removal of SeVI and AsV mixed contaminants from aqueous media by montmorillonite-nanoscale zero valent iron nanocomposite

• NZVI particle size was smaller in NZVI-Mt composite than pure NZVI. had higher Se VI and As V adsorption capacity Mt. pH influenced removal but not by single competing systems. showed partition coefficients for According to coefficients, selectivity of was: >>> . Nanoscale zero-valent iron (NZVI) supported onto montmorillonite (NZVI-Mt) were synthetized used this study remove from water mono- binary-adsorbate The kinetics isotherm data adequately described the pseudo-second-order (PSO) (r 2 >0.94) Freundlich >0.93) equations. Results scanning electron microscopy that dimension immobilized on Mt Using 0.05 g adsorbent an initial 200 mg L ?1 concentration, maximum (q max ) coefficient (PC) monocomponent system 54.75 -1 0.065 ·?M , which dropped respectively 49.91 0.055 under competitive system. For system, q PC 28.63 0.024 respectively. Values montmorillonite, indicating nanocomposite contained greater sites removing both oxyanions, with a marked preference Future research should evaluate effect different operational variables efficiency oxyanions NZVI-Mt.