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Title Use of Chemically Treated Human Hair Wastes for the Removal of Heavy Metal Ions from Water
ID_Doc 12341
Authors Zhang, HL; Carrillo-Navarrete, F; López-Mesas, M; Palet, C
Title Use of Chemically Treated Human Hair Wastes for the Removal of Heavy Metal Ions from Water
Year 2020
Published Water, 12.0, 5
DOI 10.3390/w12051263
Abstract Human hair is considered a ubiquitous waste product and its accumulation can cause environmental problems. Hence, the search for alternatives that take advantage of this waste as a new raw material is of interest, and contributes to the idea of the circular economy. In this study, chemically modified human hair was used as a low cost biosorbent for the removal of heavy metal ions from aqueous solutions. The effect of the contact time, the pH, and the biosorbent concentration on the biosorption process were investigated. Kinetic modeling indicated that the pseudo-second order kinetic equation fitted well with R-2 > 0.999. Furthermore, the equilibrium data fitted the Langmuir adsorption isotherm at 295 K resulting in saturation concentrations of 9.47 x 10(-5), 5.57 x 10(-5), 3.77 x 10(-5), and 3.61 x 10(-5) mol/g for the sorption of Cr(III), Cu(II), Cd(II), and Pb(II), respectively. The biosorption process did not change the chemical structure and morphology of the hair, which was shown by FTIR and SEM. In addition, desorption experiments prove that 0.1 mol/L EDTA solution is an efficient eluent for the recovery of Pb(II) from the treated human hair. To summarize, treated human hair showed satisfactory biosorption capacity and can be considered as an effective biosorbent for the treatment of water with a low concentration of heavy metal ions.
Author Keywords human hair; heavy metal; kinetics; isotherms; biosorption
Index Keywords Index Keywords
Document Type Other
Open Access Open Access
Source Science Citation Index Expanded (SCI-EXPANDED)
EID WOS:000555915200042
WoS Category Environmental Sciences; Water Resources
Research Area Environmental Sciences & Ecology; Water Resources
PDF https://www.mdpi.com/2073-4441/12/5/1263/pdf?version=1590559453
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