Adsorption of aqueous inorganic mercury and methylmercury on suspended kaolin: influence of sodium chloride, fulvic acid and particle content

Abstract

The main tendencies in the adsorption of dissolved inorganic mercury (Hg 2 ) and methylmercury (MeHg ) on suspended kaolin particles have been investigated in synthetic aqueous solutions. The influence of NaCl, fulvic acid (FA) and suspended particulate matter (SPM) in the system has been studied at a constant pH of 7.2. The experiments were arranged according to a full factorial design with three factors (NaCl, FA SPM) at low (À) and high () levels. A central point (

Removal of Hg2+ and methylmercury in waters by functionalized multi-walled carbon nanotubes: adsorption behavior and the impacts of some environmentally relevant factors

“…High concentration of Cl − in solution could also promote the formation of very stable MeHgCl complex which showed lower sorption than MeHg to MWCNTs. These results agreed with those of previous studies [20,48]. de Diego et al [48] found that a high concentration NaCl could led to declined adsorption rates of mercury species.…”

“…These results agreed with those of previous studies [20,48]. de Diego et al [48] found that a high concentration NaCl could led to declined adsorption rates of mercury species. Chen et al [20] revealed that the adsorption of Hg 2+ dropped drastically from 94.3% to 1.5% as the increase of Cl − concentration from 0 to 1.0 mol/L and as the pH increasing from 4.3 to 10.5.…”

Adsorption of mercury species on river sediments — effects of selected abiotic parameters

“…Despite the expectation that adsorption will be markedly lower in the presence of chloride ions due to HgCl 4 2-and RHgCl formation [13], this hypothesis was NaCl and an increase in Cl -concentration to 10 g L -1 had little effect (Fig. 4).…”

“…Humic and fulvic substances, which form very strong complexes with mercury species, also influence their adsorption [13]. However, reports describing mercury adsorption under different conditions vary.…”

“…The effect of chloride on Hg 2+ and MeHg + adsorption has been described [3,7,13,[17][18][19][20], but little information describing the effect of other anions is available. Thus, the effects of Cl -, SO 4 2-, sulfide and phosphate at 0.2 g L -1 were evaluated.…”