“…In addition to the factors mentioned above, As loads and redox conditions such as aerobic or low oxygen conditions may also be important factors for the aging mechanisms of As in soils. Because the transformation of As species and soil components such as iron hydroxides and organic matter are generally affected by the redox conditions (Zhu et al, 2008;Frohne et al, 2011;Parsons et al, 2013;Ma et al, 2014;Han et al, 2015), and the fixation of As on soil minerals is significantly influenced by As loads due to the higher adsorption amount of As on soils with increasing As loads (Goh and Lim, 2004;Huang et al, 2013). As far as we know, however, the impact of redox conditions and As loads on the aging process of As in Chinese irrigated soils has received little attention.…”