| The influences of time, pH value, temperature, ash dosage and ions concentration on Pb removal from simulated wastewater with fly ash as adsorbent were investigated. Through orthogonal experiment designed by five factors and four levels, and analysis of mean value and variance, the optimum conditions were obtained, i.e., ions concentration 60 mg/L, time 90 min, ash dosage 5.0 g, pH value 6.0 and temperature 20 ℃. Results of single factor analysis showed the adsorbing effect was relatively good inh the conditions of time 90 min, pH value 6.0, temperature 50 ℃, ash dosage 5.0 g and ions concentration 30 mg/L. Results of single factor variance analysis approved that these five factors had significant different effects on Pb removal by fly ash. |
