REMOVAL OF REACTIVE YELLOW DYE FROM AQUEOUS SOLUTIONS BY USING NATURAL COAGULANT (MORINGA OLEIFERA)

Abstract

Dyes are the main pollutants existing in wastewater of textile industries. Dyes are produced naturally or artificially and can cause fabrics to take different colors. In this paper the ability of natural products in removing dyes has been tested. After a preliminary screening for dye removal capacity, a vegetal protein extract derived from Moringa oleifera seed have been fully studied. The influences of several parameters such as pH, temperature or initial dye concentration have been tested and the behavior of coagulants has been compared. pH results to be an interesting variable and dye removal decreases as pH increases. Temperature seems not to be so affecting parameter, while initial dye concentration appears to be a very important variable in q c capacity, which is higher as IDC increases. Langmuir isotherm model fits very well in M. oleifera seed extract dye removal.