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has been cited by the following article:

• TITLE: X-Ray Absorption Spectroscopy Analysis of Lead Species Adsorbed on Various Oxides from High pH Solution

  AUTHORS: Takanori Miyake, Tetsuo Honma, Hiroshi Arimatsu, Hiroto Fukunishi, Huimin Liu, Makoto Sano, Yuuki Kakutani, Mitsumasa Okada, Kaori Shimizu, Setsuo Yoshida, Kazumasa Suetsugu

  KEYWORDS: X-Ray Absorption Spectroscopy, Water Purification, Lead Removal, Manganese Oxide, Adsorption

  JOURNAL NAME: Journal of Environmental Protection, Vol.11 No.10, October 11, 2020

  ABSTRACT: Lead dissolved in water must be removed in order not to cause diseases, especially from high pH aqueous solution. Various oxides having high specific surface area are often applied to remove lead in water media. To improve removal ability for lead species, it is necessary to understand the adsorbed structure of lead species on oxides. At first, the adsorption behavior of lead from high pH solution in the presence of Ca2+ and Na+ was compared. Lead and calcium species were adsorbed up to the monolayer, and the adsorption isotherm was analyzed as Langmuir-type adsorption. In the presence of Ca2+, the amount of removed lead was reduced. To clarify this influence of Ca2+, X-ray absorption spectroscopy was adopted. It was for the first time revealed that lead species at pH > 12 and pH