DOIONLINE

DOIONLINE NO - IJAMCE-IRAJ-DOIONLNE-4052

Publish In
International Journal of Advances in Mechanical and Civil Engineering (IJAMCE)-IJAMCE
Journal Home
Volume Issue
Issue
Volume-3,Issue-1  ( Feb, 2016 )
Paper Title
Clarification For Hg (II) Removal Mechanism In Ferrihydrite Co-Precipitaion Process By XAFS Analysis
Author Name
Tatsuya Kato, Takehiro Uchida, Liu, Chiharu Tokoro
Affilition
Department of Earth Sciences, Resources and Environmental Engineering, School of Creative Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku-ku, 169-8555 Tokyo
Pages
57-60
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
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