title: Temporal dynamics of pore water concentrations of Cd, Co, Cu, Ni, and Zn and their controlling factors in a contaminated floodplain soil assessed by undisturbed groundwater lysimeters.
abstract: We aimed to assess the dynamics of pore water concentrations of Cd, Co, Cu, Ni, Zn and their controlling factors (EH, pH, DOC, Fe, Mn, and SO4(2-)) in a contaminated floodplain soil under different flood-dry-cycles. Two parallel undisturbed groundwater lysimeters (mean values presented) were used for long term (LT; 94 days) and short term (ST; 21 days) flood-dry-cycles. Reducing conditions under LT lead to low EH and pH, while DOC, Co, Fe, Mn, and Ni increased. Cadmium, Cu, Zn, and SO4(2-) increased under oxidizing conditions during ST. Cobalt and Ni revealed a similar behavior which seem to governed by EH/pH, Mn, Fe, and DOC. Cadmium, Cu, and Zn reveal a similar fate; their dynamics were affected by EH/pH, DOC, and SO4(2-). Our findings suggest that a release of Cd, Cu, Co, Fe, Mn, Ni, and Zn under different flood-dry-cycles can assumed what might create potential environmental risks in using metal-enriched floodplain soils.
authors.affiliation: University of Kafrelsheikh, Faculty of Agriculture, Department of Soil and Water Sciences, 33 516 Kafr El-Sheikh, Egypt; University of Wuppertal, Department D, Soil- and Groundwater-Management, Pauluskirchstraße 7, 42285 Wuppertal, Germany.
authors.forename: Sabry M
authors.initials: SM
authors.lastname: Shaheen
authors.affiliation: University of Wuppertal, Department D, Soil- and Groundwater-Management, Pauluskirchstraße 7, 42285 Wuppertal, Germany. Electronic address: rinklebe@uni-wuppertal.de.
authors.forename: Jörg
authors.initials: J
authors.lastname: Rinklebe
authors.affiliation: Helmholtz Centre for Environmental Research - UFZ, Department of Soil Physics, Lysimeter station Falkenberg, Dorfstr. 55, 39615 Falkenberg, Germany.
authors.forename: Holger
authors.initials: H
authors.lastname: Rupp
authors.affiliation: Helmholtz Centre for Environmental Research - UFZ, Department of Soil Physics, Lysimeter station Falkenberg, Dorfstr. 55, 39615 Falkenberg, Germany.
authors.forename: Ralph
authors.initials: R
authors.lastname: Meissner
mesh_terms: D055868:Floods; D060587:Groundwater / Q000737:chemistry*; D019216:Metals, Heavy / Q000032:analysis / Q000737:chemistry*; D012987:Soil / Q000737:chemistry*; D012989:Soil Pollutants / Q000032:analysis / Q000737:chemistry*
chemical_list: D019216:Metals, Heavy; D012987:Soil; D012989:Soil Pollutants
keywords: Flooding periods; Metals; Redox potential; Wetland soil