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Copper and Calcium Transport through an Unsaturated Soil Column

Environment and Risk Management Group, Hort Research, Private Bag 11-030, Palmerston North, New Zealand

View larger version (15K): [in a new window]   Fig. 1. Measured, and fitted breakthrough data as a function of time using the convection–dispersion equation (CDE) for Cl- (, and solid line) and SO42- (•, and broken line).

View larger version (20K): [in a new window]   Fig. 2. Measured and fitted SO2-4 data from the suction cups at 30 mm (•), 130 mm (), and 230 mm (+) as a function of time.

View larger version (13K): [in a new window]   Fig. 3. Effluent concentrations of Ca2+ () and Cu2+ (•) as a function of time. Also shown are the predictions for Cu2+ from the convection–dispersion equation (CDE) using R values of 12.6 (broken line) and 14 (solid line).

View larger version (22K): [in a new window]   Fig. 4. Concentrations of Cu2+ from suction cups at 30 mm (•), 130 mm (), and 230 mm (+). Also shown are the predictions using the convection–dispersion equation (CDE) and an R value of 12.6.

View larger version (20K): [in a new window]   Fig. 5. Time domain reflectrometry (TDR)-measured (solid line) and predicted (broken line) bulk-soil electrical conductivity as a function of time for depths of (a) 30 mm, (b) 130 mm, and (c) 230 mm. The prediction was calculated using the convection–dispersion equation (CDE) and an R value for Cu2+ of 14.