Abstract
The textil industry uses a variety of dyes in the stage of coloring. The liquid effluent resulting at the end of the process has high turbidity and a large chemical oxygen demand. If these byproducts are dumped into natural water bodies, even in small quantities, they may produce damage to the aquatic environment and to human health. Electrocoagulation is becoming an efficient technique for the removal of pollutants from industrial effluents, it is easy to operate, and produces little sludge at the end of the treatment. In the present study, the use of an electrocoagulation reactor with aluminum electrodes proved efficient for turbidity removal from synthetic industrial effluents. The use of a solar plate of photovoltaic electricity for the functioning of the reactor was evaluated. Ideal time of treatment was 20 minutes. The use of a conventional energy source removed 63% of the turbidity. Using the voltaic solar energy source, a removal of 72% of turbidity was attained. We conclude that it is possible to use the alternative solar energy source in order to minimize costs resulting from electrical energy consumption, and, at the same time, to obtain the best results in the removal of pollutants.
Highlights
The dyeing fabric is a millenar technique
The textil industry is responsible for producing great volumes of residual waters, containing dyes, and surfactants, inorganic ions, humectant agents, among others
The aim of this work was to evaluate the applicability and efficiency of the process of electrocoagulation with the use of aluminum electrodes powered by photovoltaic energy, as an alternative energy source for the treatment of textile wastewater, and for the removal of turbidity
Summary
The dyeing fabric is a millenar technique. Several chemical components have been synthesized and produced with the aim of enhancing color fixation on the fabric. The main groups of dyes are classified according to the mode of fixation onto the fabric. The textil industry is responsible for producing great volumes of residual waters, containing dyes, and surfactants, inorganic ions, humectant agents, among others. These substances alter the quality of superficial water, producing increases in turbidity. This turbidity reduces solar incidence and interfers with the biogeochemical cycles of life in the water (QUEIROZ, 2019)
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