MERCURY CUANTIFICATION IN GRASS TRATED WITH BIOSOLIDS BY ATOMIC ABSORPTION SPECTROPHOTOMETRY WITH HYDRIDE GENERATOR MERCURY CUANTIFICATION IN GRASS TRATED WITH BIOSOLIDS BY ATOMIC ABSORPTION SPECTROPHOTOMETRY WITH HYDRIDE GENERATOR

Abstract

Solid byproducts of organic nature generated by the processes of treatment of municipal wastewater are commonly used as a nutrient source for soil treatment. These biosolids contain nutrients inorganic contaminants such as mercury, which is used to study by his knowledge widely documented about the toxicity in living systems and their effects on human. In this sense and since plants are the basis of the food chain the focus is to the grass, due to its easy growth and use in animal husbandry. Mercury in grass was quantified by atomic absorption spectrophotometry technique using hydride generator cool mist. Some validation parameters were checked with desirable acceptance criteria such as linearity (r2 = 0,999), accuracy (R = 93,14-96,12%), precision (CV= 1,11-1,69%), limits of detection and quantification (0,001-0,003 ppb). It became clear that the mercury concentrations are below the maximum values permitted by international standards, presenting the biosolids as a reliable source of nutrients for agriculture. This way establishes a methodology that can be a good tool for the analytical determination of mercury in grass