USEFULNESS OF 1 mol HCL · dcm ~(-3) EXTRACT ANT TO ASSESS COPPER, ZINC AND NICKEL CONTAMINATION IN SANDY SOIL

摘要

Suitability of 1 mol HCl extractant for monitoring of soil contamination with Zn, Cu and Ni was examined and compared to that of aqua regia. A micro-plot experiment was conducted, in which soil contamination with the above metals was simulated. For all the three elements, highly significant correlations were obtained between the total Zn, Cu and Ni determined with aqua regia versus the forms extracted with 1 mol HCl. Besides, the concentrations of both forms of Zn, Cu and Ni were highly positively correlated with their content in plants, being negatively correlated with the yields obtained. The results suggest that 1 mol HCl is suitable for observations of phytotoxic contamination of soil with Cu, Zn and Ni. The method used for monitoring purposes until present, which involved application of aqua regia as an extractant, could be replaced by a less laborious and expensive procedure which takes advantage of 1 mol HCl.