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The aim of this study was to determine soil properties influence on the heavy   metals sorption by vegetables which are used in the diet and possibilities   for prediction of their bioaccumulation by response surface methodology   (RSM). Lettuce was used as biosorbent, and cadmium (Cd) and lead (Pb) were   used as contaminants. Lettuce is grown on compost (previously contaminated   with different concentrations of Cd and Pb) which pH was adjusted with   different amounts of NPK fertilizers. The content of heavy metals was   determined by ICP-MS. Results showed that Cd content in lettuce was below the   toxic values, but Pb concentration was above allowable, which indicates that   limit value for Pb is not set in accordance with the food safety regulations.   It was found that the heavy metals accumulation in plants depends not only on   its content in the soil, but also on the plant affinity to the specific   metal, and the individual or the interactive effects of different soil   properties. Through the transfer factor it was found that lettuce has a much   higher affinity to Cd in relation to Pb. RSM has proved to be very good for   the examination of a large number of variables with a small number of   experiments

journal of the serbian chemical society

Investigation of soil properties influence on the heavy metals sorption by plants and possibilities for prediction of their bioaccumulation by response surface methodology