Surface complexation modeling for sulfate adsorption on ferrihydrite consistent with in situ infrared spectroscopic observations

Predictive model for Pb(II) adsorption on soil minerals (oxides and low-crystalline aluminum silicate) consistent with spectroscopic evidence

“…Values for goethite, quartz and hematite were predicted theoretically(Sverjensky, 2005). The value of HFO was 906 reported byFukushi et al (2013). The value of LCAS is assumed to be same as that of kaolinite (Sverjensky and Sahaifrom the regression of surface charge data of LCAS from the present study(Fig.…”

Thiocyanate adsorption on ferrihydrite and its fate during ferrihydrite transformation to hematite and goethite

“…The experiments were conducted in two separated stages at two different times (with stage one from 1 to 9 min, and stage two commencing after 10 min), and the small (<5%) difference in adsorption/desorption was attributed to the two-stage separation of the experiments. The adsorption reactions were faster than adsorption of SCN À onto various materials (such as ZnCl 2 -activated carbon, Fe(III)/Cr(III) hydroxide, zeolite and hydrotalcite) and adsorption of anions ( ) onto ferrihydrite, for which the completion times ranged from 20 min to a few hours (Hansen et al, 1994;Raven et al, 1998;Namasivayam and Sangeetha, 2005;Li et al, 2006Li et al, , 2008Namasivayam and Prathap, 2006;Namasivayam and Sureshkumar, 2007;Aguirre et al, 2010;Wu et al, 2011;Fukushi et al, 2013;Mallet et al, 2013;Xie et al, 2013;Kim et al, 2014). Although adsorption kinetics are strongly influenced by the solid/liquid ratio and initial concentration of SCN À (Namasivayam and Sureshkumar, 2007;Li et al, 2008;Wu et al, 2011), at the same initial concentration of SCN À (0.86 mM or 50 mg L À1 ) and solid/liquid ratio (2 g L À1 ), adsorption of SCN À on to ferrihydrite was still the fastest.…”

Modeling the Key Lake uranium mill's bulk neutralization process using a pilot-scale model

“…6b) (Fukushi et al, 2013;Jia et al, 2007;Lane, 2007). The AsO 4 3− group indicates the presence of As-adsorbed FH,…”