Development of a magnetic coagulant based on Moringa oleifera seed extract for water treatment
2016
Santos, Tássia R. T. | Silva, Marcela F. | Nishi, Leticia | Vieira, Angélica M. S. | Klein, Márcia R. F. | Andrade, Murilo B. | Vieira, Marcelo F. | Bergamasco, Rosângela
In this work, to evaluate the effectiveness of the coagulation/flocculation using a natural coagulant, using Moringa oleifera Lam functionalized with magnetic iron oxide nanoparticles, producing flakes that are attracted by an external magnetic field, thereby allowing a fast settling and separation of the clarified liquid, is proposed. The removal efficiency of the parameters, apparent color, turbidity, and compounds with UV₂₅₄ₙₘ absorption, was evaluated. The magnetic functionalized M. oleifera Lam coagulant could effectively remove 90 % of turbidity, 85 % of apparent color, and 50 % for the compounds with absorption at UV₂₅₄ₙₘ, in surface waters under the influence of an external magnetic field within 30 min. It was found that the coagulation/flocculation treatment using magnetic functionalized M. oleifera Lam coagulant was able to reduce the values of the physico-chemical parameters evaluated with reduced settling time.
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