A Comparative Study on Co-sorption of Zn(II) and As(V) by Mixed Fe/Al-PILCs Prepared at Different Calcination Temperatures

With synthetic wastewater, a comparative study on co-sorption of Zn(II) and As(V) by Fe/Al-PILCs prepared at different calcination temperatures was investigated using a lab-scale batch experiment technique. The effects of relevant parameters, such as pH value of solution, adsorbent dosage and contact time were examined, respectively. The results show that sorption efficiencies of Zn(II) and As(V) by Fe/Al-PILC prepared at calcination temperatures of 300 degrees C are higher than those at 350 and 400 degrees C and the higher calcination temperature is, the lower sorption efficiencies of Zn(11) and As(V) are. Co-sorption isotherm data of Zn(II) and As(V) by Fe/Al-PILCs were fitted well to Langmuir isotherm and the maximum sorption capacities of Zn(II) and As(V) on Fe/Al-PILC (Q(0)) prepared at 300 degrees C are 13.95 and 15.87 mg/g, respectively, which are higher than those at calcination temperatures of 350 degrees C and 400 degrees C. The maximum sorption capacity of As(V) decreases more obviously with increasing calcination temperature than Zn(II) does. n>1 from Freundlich isotherm indicate that the sorption of Zn(II) and As(V) by Fe/Al-PILCs is favorable. E values from D-R model indicate that the type of sorption of Zn(II) and As(V) by Fe/Al-PILCs is physical. There is significant potential for Fe/Al-PILC prepared at calcination temperature of 300 degrees C as an adsorbent material for Zn(II) and As(V) removal from aqueous solutions.