Publish In |
International Journal of Advances in Mechanical and Civil Engineering (IJAMCE)-IJAMCE |
Journal Home Volume Issue |
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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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