In addition to other technologies for removal of excess levels of fluoride from water, coagulation has revealed efficient results. Among different chemical coagulants namely, iron and aluminum salts have been wildly applied for pollutant removal. The limitations of such coagulants including problem of their handling, high volume of generated sludge and requirements of initial and final pH adjustment have encouraged the researches to look for new coagulants.

Moringa Oleifera has been considered as a natural and efficient coagulant with some benefits.

In this study fluoride removal using Moringa Oleifera seed extract was conducted. Optimum conditions were determined and modeled using response surface methodology.

Box-Behnken method with three variables (coagulant, pH and initial fluoride concentration) and three levels was applied.

It was revealed that, at constant initial fluoride concentration, with increase in Moringa Oleifera dosage, fluoride removal increased. It was also showed that pH had no significant effect on fluoride removal. At optimal condition, high levels of fluoride can be reduced significantly.

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