Chinese Journal of Chemical Engineering ›› 2020, Vol. 28 ›› Issue (7): 1884-1890.doi: 10.1016/j.cjche.2020.04.019

• Process Systems Engineering and Process Safety • Previous Articles     Next Articles

Faujasite zeolite decorated with cobalt ferrite nanoparticles for improving removal and reuse in Pb2+ ions adsorption

Elaine C. Paris1, João O. D. Malafatti1,2, Henrique C. Musetti1,2, Alexandra Manzoli3, Alessandra Zenatti4, Márcia T. Escote4   

  1. 1 Nanotechnology National Laboratory for Agriculture(LNNA), Embrapa Instrumentação, XV de Novembro St., 1452, 13560-970 São Carlos, SP, Brazil;
    2 Department of Chemistry, Federal University of São Carlos, Rod. Washington Luiz, km 235, 13565-905 São Carlos, SP, Brazil;
    3 Regional Integrated University of High Uruguay and Missions(URI), Sete de Setembro Ave., 1621, 99709-910, Erechim, RS, Brazil;
    4 Federal University of ABC(UFABC), Avenida dos Estados, 5001, Santo André, SP, Brazil
  • Received:2019-08-15 Revised:2020-03-17 Online:2020-07-28 Published:2020-08-31
  • Contact: Elaine C. Paris
  • Supported by:
    The authors would like to thank CNPq (grant number 461384/2014-0), CAPES (Finance Code 001), SISNANO/MCTIC, and AgroNano network research for their financial support.

Abstract: Water pollution caused by heavy metals ions has been gaining attention in recent years, increasing the interest in the development of methodologies for their efficient removal focusing on the adsorption process for these purposes. The current challenge faced by adsorption processes is the adequate adsorbent immobilization for removal and reuse. Thus, the present work aimed at producing a faujasite zeolite nanocomposite decorated with cobalt ferrite nanoparticles for Pb2+ ions adsorption in an aqueous medium improving magnetic removal and reuse. As a result, a high surface area (434.4 m2·g-1) for the nanocomposite and an 18.93 emu·g-1 saturation magnetization value were obtained, indicating magnetic removal in a promising material for adsorption process. The nanocomposite regeneration capacity evaluated by magnetic recovery after 24 h suspension presented a high Pb2+ ion adsorptive capacity (98.4%) in the first cycle. Around 98% of the Pb2+ ions were adsorbed in the second cycle. In this way, the synthesized faujasite:cobalt ferrite nanocomposite reveals itself as a promising alternative in adsorption processes, aiming at a synergic effect of FAU zeolite high adsorptive activity and the cobalt ferrite nanoparticles magnetic activity, allowing for adsorbent recovery from the aqueous medium via magnetic force and successive adsorptive cycles.

Key words: Faujasite zeolite, Adsorption, Cobalt ferrite, Nanoparticles, Magnetic nanocomposite