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ABSTRACT
When a substance (solute) absorbs out excess or part of another substance to reduce its effect or damage, the process is known as adsorption. Example is when spilled milk is soaked with a paper or towel, introducing okro or vegetable into a salty taste soup, adding flour to watery dough to give it a desired thickness. For the purpose of this project, another example of adsorption is the introduction of activated carbon from coconut shell to waste water from the textile industry containing dye which is harmful to the environment and aquatic habitats.
Effect of adsorbent dosage, contact time and pH are parameters influencing the treatment efficiency of crystal violet, identified as the potential contaminant in the waste water. Increase in adsorbent dosage increases the treatment removal efficiency; it is apparent that 10.0g/L and the duration of 150min are satisfactory to remove 52.5% of crystal violet for 500µm particle size of crystal violet. The adsorption equilibrium data was determined using the Freundlich Adsorption isotherm, it describes better with a higher correlation coefficient (R2 = 0.9346) in comparison with that of Langmuir (R2 = 0.7585), which also suggest that the distribution of active sites of the absorbent is exponential and the adsorption process occurs on a heterogeneous surface for the removal of crystal violet.
