Análise de metais em solo por espectroscopia de emissão óptica por plasma indutivamente acoplado

Abstract

From the emergence of the industrial revolution, the action of man on the environment has become increasingly impactful, given the growth of population, the need for the withdrawal of resources has increased considerably, the exacerbated production of products generates a large amount of waste, polluting water and soil, and part of this contamination is generated by heavy metals, which are improperly discarded by industries, presenting a risk to fauna and flora. In this work, the presence of metals (iron, aluminum, barium, chromium, cadmium, lead, cobalt, copper, molybdenum, and zinc) in soil samples from Ceará were analyzed and the presence of contamination was verified based on national legislation. The concentration of iron, aluminum, barium, and chromium was investigated by Inductively Coupled Plasma Atomic Emission Spectrometry (ICP-OES). The samples (C and D) showed values for chromium above those proposed by CONAMA nº 420, making it necessary to evaluate possible pollution of human origin. Sample D also presented discordant values for Barium, indicating that the soil would not be suitable for agriculture. For all samples, high levels of aluminum and iron concentration were found, indicating potential risks for local fauna and flora. The results suggest the need for studies to regulate and create parameters for soil iron and aluminum concentration in soils, since they affect human health, agriculture, as well as the creation of specific regional parameters for each state of our count.