Abstract
In this paper the electrolytic process application as a water purification treatment stage from the Ipe neighborhood lake (Ilha Solteira –Sao Paulo, Brazil–) was evaluated. The treatment efficiency for apparent and true color removal, in samples by addition of humic substances, to reach different colors levels was determined. It was monitored the 1 g/L NaCl and TiO2 addition individual effect. The removal efficiency for each trial in samples taken from the electrolytic reactor each 10 minutes during one hour, were calculated.For the water sample with initial apparent color of 25 Hu, it was reduced up to 15 Hu –maximum permitted value according the Brazilian drinking water guidelines– after 30 reaction minutes. For the apparent water color with 66 Hu, with sodium chloride addition, a reduction up to 13 Hu was measured after one hour reaction. In the trials with humic substances addition, the apparent color removal for water with 708 and 247 Hu, were 87.3 % and 84.2 %, respectively, after 60 minutes of reaction.The results showed the electrolytic process performance with use of salts as a drinking water treatment stage, both for the apparent color reduction below the maximum permitted values defined by the legislation, as for its removal up to certain levels, treatment stage that should be complemented by additional stages.
Highlights
For the water sample with initial apparent color of 25 Hu, it was reduced up to 15 Hu –maximum permitted value according the Brazilian drinking water guidelines– after 30 reaction minutes
The results showed the electrolytic process performance with use of salts as a drinking water treatment stage, both for the apparent color reduction below the maximum permitted values defined by the legislation, as for its removal up to certain levels; treatment stage that should be complemented by additional stages
Se dispusieron los electrodos en sus posiciones dentro del reactor, se fijaron los caimanes en su parte superior y se depositó el agua que se iba a someter al tratamiento, cuyo tiempo de exposición al tratamiento fue de 60 minutos
Summary
El uso del agua para consumo humano es considerado su fin más noble y prioritario, toda vez que el ser humano depende de una oferta adecuada del líquido para su sobrevivencia y mantenimiento de la calidad de vida. Con base en lo anterior, el tratamiento electrolítico presenta una potencial aplicación para la remoción de color en los procesos de tratamiento de agua proveniente de fuentes superficiales; por ello la importancia de la evaluación de dicha tecnología como fase de la potabilización del agua. La presente investigación tuvo como objetivo evaluar el desempeño del proceso electrolítico para la remoción de diversos niveles de color, tanto en condiciones naturales como por medio de la adición de sustancias húmicas para simular elevados valores de color, comunes en épocas de lluvias; finalmente, se evaluó el proceso con la adición individual de 1 g/L de cloruro de sodio y de dióxido de titanio al líquido a ser tratado
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