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Removal of Lead Ion From Aqueous Solutions by Adsorption Onto Phosphate-Functionalized Treated Waste Papers (Pf-Twps) Publisher



Mahvi AH1, 2 ; Sarmadi M3, 4 ; Sanaei D5 ; Abdolmaleki H6
Authors
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Authors Affiliations
  1. 1. School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
  2. 2. Center for Solid Waste Research, Institute for Environmental Research, Tehran University of Medical Sciences, Tehran, Iran
  3. 3. Department of Environmental Health Engineering, School of Health, Torbat Heydariyeh University of Medical Sciences, Torbat Heydariyeh, Iran
  4. 4. Health Sciences Research Center, Torbat Heydariyeh University of Medical Sciences, Torbat Heydariyeh, Iran
  5. 5. Department of Environmental Health Engineering, School of Public Health and Safety, Shahid Beheshti University of Medical Sciences, Tehran, Iran
  6. 6. Department of Environmental Health Engineering, School of Public Health, Hamedan University of Medical Science, Hamedan, Iran

Source: Desalination and Water Treatment Published:2020


Abstract

Waste papers, although known as a potential global concern, could be used as an adsorbent for removal of lead ions from the aqueous medium, following some degrees of modifications. The present study deals with the adsorption of Pb(II) ion from aqueous solution by using phosphate-functionalized treated waste papers (PF-TWPs). Batch adsorption study was performed based on contact time, pH, adsorbent dose, and temperature. There was logical coordination of experimental data with Freundlich and Langmuir isotherms. The results of this study showed that the percentage of Pb(II) adsorption on the PF-TWPs increased with increasing pH of approximately 5.5, higher or lower pHs showed no remarkable variation in adsorption capacity. The kinetics analysis showed a substantial correlation between the experimental adsorption data with the pseudo-second-order model. Besides, thermodynamic studies were conducted to explore the adsorption of Pb(II) onto PF-TWPs, regarding the influence of temperature on this process. The spontaneity and endother-micity of the Pb(II) adsorption process were identified based on the negative free energy value and positive enthalpy change. The result of the present study showed that the PF-TWPs could be used as a cost-effective adsorbent for Pb(II) removal from industrial effluent. © 2020 Desalination Publications. All rights reserved.
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