Removal of methylene blue by using biosolid

The mechanism of Methylene Blue adsorption on biosolid (waste sludge) has been studied
through batch experiments. The effects of various experimental parameters, such as pH (3-
11), biosolid dosage (1-10 g l-1), contact time (5-1440 min) and initial dye concentration were
investigated. The results showed that the dye removal increased with increase in the initial
concentration of the dye and also increased in amount of biosolid used and initial pH.
Adsorption data was modeled using the Freundlich adsorption isotherm. The results show
that biosolid could be employed effective and low cost material for removal of dyes and colour
from aqueous solution.