Removal of fluoride from water by Moringa oleifera seed residue after oil extraction

Abstract

The search for new low cost materials is an important task of contemporary research in the environmental protection. Application of Moringa oleifera as a natural coagulant has revealed efficient result for different pollutants removal. The present study deals with the use of Moringa oleifera residue (MSR) powder as a coagulant for removal of fluoride and optimization of dose. The particle size of the respective coagulant particle was found to be (103.22±62.02 µm× 95±42.55 µm) which contains pores/cavities on the surface shows that average pore sizes is 6.01±3.23 nm × 7.26±3.33 nm in SEM image. Statistical analysis through two way ANOVA reveals that the removal efficiency of MSR coagulant found to be increased with decrease in initial fluoride concentration (2mg/l - 10mg/l) and increase in coagulant doses (4g/l - 18g/l). The optimum dose of coagulant was found to be 16g/l. The mean removal efficiency of 2mg/l (M=62, SD= 25.78) found to be significantly higher than other initial fluoride concentration (4mg/l-10mg/l). The maximum removal efficiency is found to be 95.22% for optimized dose. Index Terms— Moringa Seed Residue (MSR), coagulant, fluoride, removal efficiency, ordinary two way ANNOVA, post hoc tukey HSD test, WHO ——————————  ——————————