Paper Title :Clarification For Hg (Ii) Removal Mechanism In Ferrihydrite Co-Precipitaion Process By XAFS Analysis

Author :Tatsuya Kato, Takehiro Uchida, Liu, Chiharu Tokoro

Article Citation :Tatsuya Kato ,Takehiro Uchida ,Liu ,Chiharu Tokoro , (2016 ) " Clarification For Hg (Ii) Removal Mechanism In Ferrihydrite Co-Precipitaion Process By XAFS Analysis " , International Journal of Advances in Science, Engineering and Technology(IJASEAT) , pp. 90-93, Volume-4,Issue-1, Spl. Iss-2

Abstract : Inorganic mercury is known as one of the toxic elements and strictly regulated by Japanese effluent standard that need to be under 0.005 mg/dm3 for discharged water. This value is the lowest among other inorganic toxic elements regulated in Japan. As a result, high quality method has been required for Hg(II) wastewater treatment. Objective of this study is to clearify Hg(II) removal mechanism using ferrihydrite in co-precipitation process. Isotherm drawing, X-ray diffraction (XRD) and X-ray Adsorption Fine Structure (XAFS) analysis were conducted for both co-precipitation and adsorption processes to investigate the immobilization mechanism at pH 4. These experimental results suggested that the sorption mechanism of Hg(II) with ferrihydrite was almost the same between co-precipitation and adsorption processes, but it involved not only surface complexation but also three dimensional uptakes such as surface precipitation. Index terms- XAFS, Co-precipitation, Hg(II) removal, Ferrihydrite, Isotherm

Type : Research paper

Published : Volume-4,Issue-1, Spl. Iss-2

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