Removal of Pb(II) and Cd(II) ions from aqueous solutions using modified fish scale bioadsorbent
Hernández Pérez, Yamilet (Instituto Politécnico Nacional (Mèxic))
Leal Castañeda, Everth Jimena (Instituto Politécnico Nacional (Mèxic))
Melendez, Jorge (Instituto Politécnico Nacional (Mèxic))
Montesinos-Pedro, Edith (Instituto Politécnico Nacional (Mèxic))
Abo Markeb, Ahmad (Universitat Autònoma de Barcelona. Departament d'Enginyeria Química, Biològica i Ambiental)
Font i Segura, Xavier (Universitat Autònoma de Barcelona. Departament d'Enginyeria Química, Biològica i Ambiental)

Data:	2025
Resum:	The need to conserve water is important, as it is predicted that in approximately 20 years there will be a global water shortage. In Mexico and the rest of the world, scientists are constantly looking for methods to help conserve and improve the processes used to treat the wastewater generated and reuse it safely. In this work, Tilapia fish scales modified with acetic acid were used for the removal of heavy metals from model water. For this experiment, the following adsorbent dose range was applied: 0. 4 g to 1 g; the pH ranged from 4 to 7; and the contact time varied between 60 and 120 min. A three-factor experimental design was considered, including variables such as the adsorbent dose, contact time, and pH, each at three levels. The chemical modification produced a more porous surface on the flakes, facilitating metal adsorption, as confirmed by morphological and physicochemical analyses. The results obtained confirmed the removal of 94 and 83% of Cd(II) and Pb(II) metal ions, respectively, with an bioadsorbent dose of 1 g at a pH of 4 and a contact time of 120 min for Cd(II) and an adsorbent dose of 0. 4 g, a pH of 4, and a contact time of 90 min for Pb(II), with an initial concentration of 200 mg/L for both metals. The Brunauer-Emmett-Teller (BET) analysis results provide critical insights into the textural properties of modified fish scales. The modified fish scales have great potential for removing heavy metals from industrial wastewater.
Nota:	Altres ajuts: Ahmad Abo Markeb is the recipient of a postdoctoral fellowship from the Spanish Ministerio de Universidades, María Zambrano ID 715364.
Drets:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Llengua:	Anglès
Document:	Article ; recerca ; Versió publicada
Matèria:	Bioadsorbent ; Fish scales ; Heavy metals ; Wastewater
Publicat a:	ChemEngineering, Vol. 9, issue 2 (April 2025) , art. 23, ISSN 2305-7084

DOI: 10.3390/chemengineering9020023

19 p, 3.7 MB

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