ELEMENTOS-TRAÇO EM SOLOS AGRÍCOLAS DE RIO VERDE- GOIÁS

Abstract

The micro-region of the Southwest of Goiás, which the Rio Verde is the main hub, is a major producer of grains, especially soybeans and corn. In these agricultural areas, the soil is the main component providing conditions for a satisfactory development of these cultures, and the evaluation and maintenance of quality have direct implications not only in crop production, but also on environmental quality and human health. One of the factors that can negatively influence the quality of soil is its contamination with potentially toxic trace elements such as Cd, Pb and Ni, and this may be naturally present in soil composition or be added through waste disposal industrial wastewater, as well as the use of fertilizers and pesticides, among other agricultural inputs. Knowledge of the total amounts of these elements in the soil are essential in the diagnosis or not environmental contamination, allowing with it a better definition of contaminated land management strategies. In this sense, this study aimed to determine and evaluate the levels of trace elements arsenic (As), cobalt (Co), mercury (Hg), chromium (Cr), nickel (Ni), cadmium (Cd), copper (Cu), lead (Pb) and selenium (Se) a non-metal, in agricultural soil samples and adjacent area with little human influence, located in the operating area of the COMIGO (Agroindustrial Cooperative of Rural Producers of Southwest Goiás). It used the acid solubilization method of the American Environmental Protection Agency (USEPA) for the extraction of the elements under study, and the analytical determinations were by atomic emission spectroscopy with inductively coupled plasma. It was observed thar the levels of these elements in the soil, contribut to a better identification of potential risks that the presence of these elements offers to the men kind and the other potentially exposed organisms. It can also work as a fundamental basis for municipal and / or state environmental agency in the creation of a database on trace element levels in agricultural areas of the State of Goiás.