Host: Abstracts of Annual Meeting of the Geochemical Society of Japan
Name : Abstracts of Annual Meeting of the Geochemical Society of Japan
Number : 69
Date : September 05, 2022 - September 16, 2022
Pages 28-
Understanding the adsorption behavior of heavy metals on soil minerals is important to determine their mobility at the surface. The adsorption of heavy metals depends on the mineral surface charge; at low pH, the surface is positively charged and thus adsorbs anions, while at high pH, the surface is negatively charged and thus adsorbs cations. Takeda et al. (2021 Japan Association of Mineralogical Science abstracts) conducted desorption experiments using contaminated soil. The results showed that the eluted concentration of heavy metals was high at low pH and decreased with increasing pH. However, minimum concentrations were taken at pH 7-9, and eluted concentrations increased at higher pH. Such behavior of heavy metal leaching at high pH has rarely been reported in previous studies. Therefore, this study aims to clarify the adsorption behavior of heavy metals on oxides under high alkaline conditions. In this study, the adsorption behavior of lead at various pH conditions (3-12) was investigated using synthetic goethite.
