Selected Operational Factors Effects On Adsorption Kinetics Of Arsenic

Résumé: This paper presents a report on the assessment of operational factors that impacted on the adsorption kinetic of arsenic (Asc) onto powdered eggshell (PDEs). The elemental compositions of the PDEs were monitored using standard procedures. Adsorption kinetics of Asc onto PDEs was monitored using standard adsorption kinetics models. Effects of pH, particle size, mass adsorbent, and initial Asc concentrations on the kinetics of Asc adsorption onto PDEs were studied and analyzed using analysis of variance (ANOVA). The study revealed that substantial factors that had effect on adsorption kinetics of Asc onto PDEs were time (F12,36 = 2.477 , p = 0.022), initial concentration of Asc (F12,36 = 98.625, p = 2.0 x 10 -17), pH (F12,36= 66. 174, p = 4.78 x 10 -14 ), particle size of the adsorbent (F12,36 =129.828, p = 1.35 x 10 -12) and mass of the adsorbent (F12,36 = 144.390 , p = 2.24 x 10 -13 ) at 95 % confidence level. It was concluded that PDEs can adsorb arsenic ions and the presence of metallic ions (Fe, Al, C, O, Si and Ca) aided arsenic removal. Mass of adsorbent, pH, particle size, and initial Asc concentration are substantial factors that impacted the adsorption kinetic of Asc onto PDEs.

Publié dans la revue: Algerian Journal of Engineering Research