cadmium removal from aqueous solution with nano γ-alumina/β-cyclodextrin as nanobiosorbent and determination by faas

Abstract: a novel extraction method for selective extraction and determination of trace amounts of cadmium (ii) ions in water samples has been investigated. this method is based on the selective sorption of the cd(ii) ions used nano γ-alumina coated with β-cyclodextrin as nano adsorbents and determination by atomic absorption spectrometry. the effects of various parameters such as ph, the cd(ii) concentration, amount of sorbent, and type and concentration of the eluting agents were determined on the removal efficiency. the limit of detection (lod) and repeatability (rsd%) values (0.389) obtained were found to be in the ranges of 6.77-6.81 μg/l. the results showed adsorbed cadmium ions are recovered on the nano γ- alumina/β-cyclodextrin surface with an optimum amount of 16 ml of 0.3 m nitric acid as eluting agent at ph 7.