SCI和EI收录∣中国化工学会会刊

Chinese Journal of Chemical Engineering ›› 2021, Vol. 39 ›› Issue (11): 112-125.DOI: 10.1016/j.cjche.2020.08.050

• Separation Science and Engineering • Previous Articles     Next Articles

Polyamide-baghouse dust nanocomposite for removal of methylene blue and metals: Characterization, kinetic, thermodynamic and regeneration

Abdullah A. Basaleh1, Muhammad H. Al-Malack1, Tawfik A. Saleh2   

  1. 1 Department of Civil and Environmental Engineering, King Fahd University of Petroleum and Mineral, Dhahran 31261, Saudi Arabia;
    2 Department of Chemistry, King Fahd University of Petroleum and Mineral, Dhahran 31261, Saudi Arabia
  • Received:2020-06-13 Revised:2020-08-13 Online:2021-12-27 Published:2021-11-28
  • Contact: Muhammad H. Al-Malack
  • Supported by:
    The authors gratefully thank King Fahad University of Petroleum and Minerals (Saudi Arabia, Dhahran) for the valuable support provided during this study.

Polyamide-baghouse dust nanocomposite for removal of methylene blue and metals: Characterization, kinetic, thermodynamic and regeneration

Abdullah A. Basaleh1, Muhammad H. Al-Malack1, Tawfik A. Saleh2   

  1. 1 Department of Civil and Environmental Engineering, King Fahd University of Petroleum and Mineral, Dhahran 31261, Saudi Arabia;
    2 Department of Chemistry, King Fahd University of Petroleum and Mineral, Dhahran 31261, Saudi Arabia
  • 通讯作者: Muhammad H. Al-Malack
  • 基金资助:
    The authors gratefully thank King Fahad University of Petroleum and Minerals (Saudi Arabia, Dhahran) for the valuable support provided during this study.

Abstract: In this research, polyamide modified baghouse dust nanocomposite (PMBHD) was synthesized from steel industry waste using the interfacial polymerization technique. Adsorption capacities of the PMBHD were examined for the uptake of cadmium Cd (II), lead Pb (II), and methylene blue MB from simulated solutions. The effects of different operational factors of the adsorption, including contact time, pH, adsorbent dosage, initial concentration, and temperature, were investigated. The obtained results revealed that the equilibrium data of MB, Pb (II), and Cd (II) were best fitted to Dubinin-Radushkevich, Langmuir, and Freundlich isotherm. Maximum removal uptake was found to be 6.08, 119, and 234 mg·g-1, whereas maximum removal efficiencies of 90%, 99.8%, and 98% were achieved for MB, Pb (II), and Cd (II). Adsorption kinetics of MB and metals well-fitted to the pseudo-second-order kinetic. The characterization results showed the presence of polymeric chain on the surface of the PMBHD. The thermodynamic study revealed that the values of the free energy ΔG for Pb (II) and Cd (II) were found to be negative, which indicates spontaneous, energetic, and favorable adsorption. While for MB removal, positive values of (ΔG) were noticed, which implies that the adsorption was unfavorable. The proposed mechanism for the adsorption of MB and metals on the PMBHD showed that the dominating mechanism is physisorption. The adsorption/desorption results verified the high reusability of the PMBHD for adsorption of MB and metals.

Key words: Waste management, Adsorption, Low-cost adsorbents, Nanomaterials, Polymerization, Composites

摘要: In this research, polyamide modified baghouse dust nanocomposite (PMBHD) was synthesized from steel industry waste using the interfacial polymerization technique. Adsorption capacities of the PMBHD were examined for the uptake of cadmium Cd (II), lead Pb (II), and methylene blue MB from simulated solutions. The effects of different operational factors of the adsorption, including contact time, pH, adsorbent dosage, initial concentration, and temperature, were investigated. The obtained results revealed that the equilibrium data of MB, Pb (II), and Cd (II) were best fitted to Dubinin-Radushkevich, Langmuir, and Freundlich isotherm. Maximum removal uptake was found to be 6.08, 119, and 234 mg·g-1, whereas maximum removal efficiencies of 90%, 99.8%, and 98% were achieved for MB, Pb (II), and Cd (II). Adsorption kinetics of MB and metals well-fitted to the pseudo-second-order kinetic. The characterization results showed the presence of polymeric chain on the surface of the PMBHD. The thermodynamic study revealed that the values of the free energy ΔG for Pb (II) and Cd (II) were found to be negative, which indicates spontaneous, energetic, and favorable adsorption. While for MB removal, positive values of (ΔG) were noticed, which implies that the adsorption was unfavorable. The proposed mechanism for the adsorption of MB and metals on the PMBHD showed that the dominating mechanism is physisorption. The adsorption/desorption results verified the high reusability of the PMBHD for adsorption of MB and metals.

关键词: Waste management, Adsorption, Low-cost adsorbents, Nanomaterials, Polymerization, Composites