Extraction of cadmium in soil using Mehlich-1 and Barium Chloride methods
Keywords:
Mehlich -1. Barium Chloride. Argisol. Heavy metals.Abstract
The objective of this study was to compare the Mehlich-1 and barium chloride methods as extractants of cadmium from an Argisol soil. The experiment was conducted in a greenhouse at the State University of Santa Catarina. The experimental design was completely randomized in a 2x4 factorial arrangement, with two plant species and four cadmium doses (0; 1.5; 3.0; 6.0 mg kg-1) studied, each with three replications. The experimental units consisted of plastic trays containing 1.8 kg of soil. Cadmium doses were applied to the plots in the form of a solution prepared with Cd(NO3)2 at the adopted concentrations, and the soil was then incubated for 15 days. After this period, soil fertilization was carried out according to the recommendations of the Soil Chemistry and Fertility Commission – RS/SC. To quantify Cd, extraction was performed using the Mehlich-1 and Barium Chloride methods. The Mehlich-1 method was found to be more efficient than the Barium Chloride method for extracting cadmium from Red-Yellow Argisol soil.
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