Atuação da Moringa oleifera Lam como coagulante no tratamento de água de piscina

Abstract

Nowadays, the treatment of swimming pool water is carried out by chemical coagulants as aluminum sulfate, because of their high efficiency. However, residual aluminum treatment can cause various problems such as irritation of the skin and eyes, corrosion of equipment, the pH variation, among others. In this work, we studied the total or partial replacement of the chemical coagulant for extracted natural coagulant Moringa oleifera seeds to solve these problems. Therefore, we performed experimented using the moringa in various conditions, as follows: crushed in saline solution NaCl 1 mol/L, crushed in saline solution NaCl 1 mol/L with addition of different percentages of aluminum sulfate and seeds pounded after than were dried in an oven. To find the best conditions of use of moringa, analyzes were made of the parameters turbidity, pH and pool water color. The performance of natural coagulant showed better results when seeds of moringa were crushed in blender in NaCl solution of 1 mol/L with 10% of aluminum sulfate. The results showed removal, approximately, 95 % of the turbidity and 93 % of water color without changing the pH of the pool water. Finally, we analyzed the effect of moringa storage over a period of 28 days. The experiments showed that the effect of moringa coagulant showed little variation in efficiency. Therefore, it is possible stocking it in saline or dry powder. These results show the possibility of developing a product composed of moringa and aluminum sulfate for pool water cleaning.