Cation exchange and CaCO3 dissolution during artificial recharge of effluent to a calcareous sandstone aquifer

Mobilization and retardation of reduced manganese in sandy aquifers: Column experiments, modeling and implications

“…Mn 2+ was significantly retarded in all four experiments, appearing in the outflow solution only after 40-50 pore volumes (4-5 L). By this time, the concentrations of Na + , K + and Mg 2+ were already stable at their inflow values whereas the Ca 2+ concentration stabilized on a value that was higher by about 0.5 mmol L À1 than its inflow concentration (Goren et al, 2011). The outflow solutions remained under-saturated with respect to calcite (X calcite = 0.3-0.8 for pH range of 6.8-7.2; Goren et al, 2011), suggesting that calcite dissolution is a significant process in the columns.…”

“…Stage I corresponds to the increase in Ca 2+ concentration up to values above its inflow concentration and results from its exchange with Na + , K + and Mg 2+ (Fig. 3B; Goren et al, 2011). The trace Mn 2+ was completely retained by the column at this stage (Fig.…”

Environmental damage and public health threat caused by cemeteries: a proposal of ideal cemeteries for the growing urban sprawl

“…Such a high OC level in the soil might interfere with the contamination of the deeper layers of the profile; however, this would also depend on the levels of clay present, i.e., the greater the clay content, the lower the soil's cation exchange capacity (Goren et al, 2011). The large quantity of OC was not unusual because cemeteries are areas of constant decomposition of organic matter (Goren et al, 2011;Daynes et al, 2013;Trindade & Neckel, 2014).…”

Combining boron isotopes and carbamazepine to trace sewage in salinized groundwater: A case study in Cap Bon, Tunisia

“…compensates Ca 2+ and Sr (Goren et al, 2011;Griffioen, 1993). Although boron is supplied by seawater, most of well samples were plotted under the seawater dilution line (Fig.…”