International Journal of Advances in Science, Engineering and Technology(IJASEAT)
.
current issues
Volume-8,Issue-3  ( Jul, 2020 )
Statistics report
Sep
Submitted Papers : 80
Accepted Papers : 10
Rejected Papers : 70
Acc. Perc : 12%
  Journal Paper

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

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


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

| PDF |
Viewed - 40
| Published on 2016-03-22
   
   
IRAJ Other Journals
IJASEAT updates
Volume-8,Issue-1(Jan, 2020)
The Conference World

JOURNAL SUPPORTED BY