Manganese mobilization and enrichment during soil aquifer treatment (SAT) of effluents, the Dan Region Sewage Reclamation Project (Shafdan), Israel.

摘要: The composition of groundwater reclaimed from tertiary soil aquifer treatment systems reflects the dynamic processes taking place in subsurface, between infiltration basin and production wells. At end year 2000, following more than a decade operation, high Mn concentrations (2 μmol L-1≤ ≤ 40 L-1) appeared effluents Dan Region Sewage Reclamation Project (Shafdan), Israel. A mass balance indicates that excess originated rocks, most likely reduction sedimentary Mn-oxides under suboxic conditions. subsequent adsorption Mn2+ results slow front advances direction flow only when all exchangeable sites are saturated. retardation factor obtained two independent estimates based on simple reduction−adsorption−advection model yields value about 10. This explains delayed appearance at distance ∼500 m i...