Síntese de hidróxido duplo lamelar para a remoção de corantes alimentícios

Abstract

Water is essential for the maintenance of living beings and its quality is an indispensable aspect to be considered in its main uses. Unfortunately around the world, about 1 billion people lack water for minimum needs and 2.9 billion lack water treatment programs. Brazil has about 12% of the planet's fresh water, with enormous water potential. Although the scenery is calm, water is one of the most used natural resources by man, being indispensable in many activities, such as public supply, industrial production processes, agriculture, recreation and, unfortunately, as the destination of a series of wastes. Effluents discarded by the food industries are important sources of water pollution, as they may contain high concentrations of organic matter causing eutrophication, in addition to the intense color due to the presence of chromophore substances, characterized as dyes, in which there are several legal restrictions on their use. carcinogenic hazardousness. In this work, hydrocalumite synthesis is being performed to be used as adsorbent in removal tests of tartrazine yellow and indigotine blue food dyes in aqueous solutions. The partial results showed that HDL has a high efficiency in removing tartrazine yellow dye. With the experiments carried out so far, it is possible to use this method to remove these dyes discarded by food industries which may mitigate environmental impacts caused by improper disposal of such pollutants in water bodies.