PHENOL ADSORPTION ON POWDERED EGGSHELL

Phenol is a known prejudicial ecotoxin and finds in the environment due to the activity of the petrol industry. The aim of this applied-analytical study is to investigate phenol removal from urban drinking water using batch reactor with using powdered eggshell. Various operating variablesare tested for their effects on phenol removal; these include pH, contact time, adsorbent doses, initial phenol concentration, reaction kinetics, and powdered eggshell characteristics. Sample of urban drinking water is prepared containing 5-15 mg/L phenol. Powdered eggshell is prepared in a laboratoryoven at 105˚C for 12 h. The phenol-containing water enters batch reactor and phenol removal efficiency is studied in different cases of the variables pH (3-11), contact time (0-120 min), and adsorbent doses (3-5 gr/dl). Characteristics of the eggshell powder show that the average diameter sizeof eggshell powder is 2 μm. The main component of eggshell powder is calcium carbonate (CaCO3). The best conditions for phenol removal are obtained to be pH 3, contact time 80 min, and adsorbent dose 4 gr, and phenol concentration 5 mg/L. The adsorption of phenol on powdered eggshell is obtained from Langmuir isotherm

کلیدواژه ها:

Adsorption ، Isotherm ، Phenol ، Powdered eggshell ، Urbane drinking water