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Indranil Saha,Uday Chand Ghosh,Kaushik Gupta,Sudipta Chakraborty,Debashis Chatterjee 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.4
This study investigates the adsorption of As(III) on b-cyclodextrin modified hydrous ferric oxide (HCC). This is characterized by XRD, FESEM, AFM, XPS, BET, surface site concentration and FTIR. The modification of hydrous ferric oxide (HFO) surface by b-cyclodextrin provides ample –OH groups which in turn increase As(III) adsorption on HCC compared to HFO. The adsorption remains almost constant in pH range 3–8 which decreases at higher pH (>8) and followed monolayer and pseudo first order kinetics. It is spontaneous at 303 K with increasing entropy and decreasing enthalpy. Thus HCC is found to be more efficient adsorbent than HFO.