3.2.4 Effect of powdered eggshells dosage on sorption process
The effect of powdered eggshells dosage on sorption of lignosulfonate is shown in Figure 7. The amount of lignosulfonate compound adsorbed increased from 78.83% to 92.16% with an increase in adsorbent dosage from 5 g to 30 g at pH = 7. As explained above, when the eggshell powder is mixed with the solution, calcium salts may partially dissolve and release Ca2+, HCO3-, CO32- and OH- ions causing the solution to become basic and forming negative charges of the surfaces of the eggshell particles. As the dosage of eggshell is increased, the solution becomes more basic and the surface area negative charge increases; thus, adsorption of lignosulfonate is increased. A maximum removal of 92.16% was observed at an adsorbent dosage of 30 g per 100 mL of lignosulfonate solution.
3.2.4 Effect of powdered eggshells dosage on sorption processThe effect of powdered eggshells dosage on sorption of lignosulfonate is shown in Figure 7. The amount of lignosulfonate compound adsorbed increased from 78.83% to 92.16% with an increase in adsorbent dosage from 5 g to 30 g at pH = 7. As explained above, when the eggshell powder is mixed with the solution, calcium salts may partially dissolve and release Ca2+, HCO3-, CO32- and OH- ions causing the solution to become basic and forming negative charges of the surfaces of the eggshell particles. As the dosage of eggshell is increased, the solution becomes more basic and the surface area negative charge increases; thus, adsorption of lignosulfonate is increased. A maximum removal of 92.16% was observed at an adsorbent dosage of 30 g per 100 mL of lignosulfonate solution.
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