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Soil Solid-Phase Controls Lead Activity in Soil Solution

^a Soil Science Dep., Faculty of Agriculture, Cairo Univ., Giza, Egypt
^b Agriculture and Environment Division, IACR-Rothamsted, Harpenden, Hertfordshire, AL5 2JQ, UK

View larger version (22K): [in a new window]   Fig. 1. Changes in PbL/(PbL + CdL) mole fraction after shaking solutions with Soil 2, where L represents the chelating ligand.

View larger version (18K): [in a new window]   Fig. 2. Plot of Pb2+ activities as a function of pH for the 11 soils used in the study.

View larger version (20K): [in a new window]   Fig. 3. Measured Pb2+ activities of this study () compared with the solubilities of various Pb minerals.