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Received May 23, 2022
Accepted August 8, 2022
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This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits
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Adsorption of Three Chlorinated Herbicides on Two Activated Carbons: An Example of the Effect of Surface Charge, Pore Diameter and Molecular Size on the Adsorption Process
Pila Matías N.1
Colasurdo Diego D.1 2
Simonetti Sandra I.3 4
Dodero Gabriela A.2 5
Allegretti Patricia E.1
Ruiz Danila L.1 2
and Laurella Sergio L.1†
1CEDECOR (Centro de Estudio de Compuestos Orgánicos), Facultad de Ciencias Exactas, Universidad Nacional de La Plata (UNLP), Calle 115 y 47, (1900) La Plata, Argentina 2CONICET (Consejo Nacional de Investigaciones Científicas y Técnicas), Argentina 3Instituto de Física del Sur (IFISUR), Departamento de Física, Universidad Nacional del Sur (UNS), CONICET, Av. L. N. Alem 1253, B8000CPB Bahía Blanca, Argentina 4Universidad Tecnológica Nacional (UTN), 11 de Abril 461, B8000LMI Bahía Blanca, Argentina 5Instituto de Física del Sur (IFISUR), Departamento de Física, Universidad Nacional del Sur (UNS), CONICET,, Av. L. N. Alem 1253, B8000CPB Bahía Blanca, Argentina
sllaurella@quimica.unlp.edu.ar
Korean Chemical Engineering Research, February 2023, 61(1), 97-108(12), 10.9713/kcer.2023.61.1.97 Epub 26 January 2023
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Abstract
Two carbonaceous adsorbents CAT and CARBOPAL were tested for reducing the concentration of the three herbicides in water: 2,4-D (2,4-dichlorophenoxyacetic acid), TCP (2,4,6-trichlorophenol) and metolachlor. Textural and chemical characterization of the adsorbents include nitrogen isotherms, FTIR, titration and thermogravimetric analyses. Adsorption was studied in discontinuous adsorption experiments at different pH values. The experimental adsorption isotherms data were fitted to four theoretical models. Adsorbent characterization reveals that CAT has higher micropore area, lower pore diameter and lower acidity than CARBOPAL. The adsorption is a second-order process and the isotherms best fitted to Sips model. The efficiency of the process depends mainly on the charge of the adsorbate for TCP and 2,4-D, but it depends on the charge of the surface for metolachlor. Adsorption capacity is higher on CAT for 2,4-D and TCP (small molecules), and it is higher on CARBOPAL for metolachlor (large molecules). Theoretical calculations clearly support this assumption.
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O’Brien & Gere Engineering Inc., Innovative Engineering Technologies for Hazardous Waste Remediation, ITP, United States (1995).
http://www.quimicaviva.qb.fcen.uba.ar/v10n2/garcia.html.
Bandala ER, Octaviano JA, Albiter V, Torres LG, Designing and Applying Treatment Technologies: Remediation of Chlorinated and Recalcitrant Compounds, Battelle Press, Ohio (1998).
Torres L, Mijailova P, Möeller G, Ingeniería Hidráulica en México, 12(3), 15 (1997)
Sing KSW, Everett DH, Haul RAW, Moscou L, Pierotti RA, Rouquerol J, Siemieniewska T, Pure Appl. Chem., 57(4), 603 (1985)
Ren X, Chen C, Nagatsu M, Wang X, Chem. Eng. J., 170(2), 395 (2011)
Unob F, Wongsiri B, Phaeon N, Puanngam M, Shiowatana J, J. Hazard. Mater., 142(1), 455 (2007)
Spaltro A, Caputo M, Pila M, Colasurdo D, Laurella S, Ruiz D, Schiavoni M, Allegretti P, Int. J. Eng. Res. Management, 3(12), 20 (2016)
Laurella S, Pis Diez C, Lick I, Erben M, Allegretti P, Int. J. Eng. Tech. Res., 3(2), 96 (2015)
El-Sheikh AH, Sweileh JA, Al-Degs YS, Insisi AA, Al-Rabady N, Talanta, 74(5), 1675 (2008)
Taha SM, Amer ME, Elmarsafy AE, Elkady MY, J. Environ. Chem. Eng., 2, 2013 (2014)
Spaltro A, Simonetti S, Alvarez Torrellas S, Garcia Rodriguez J, Ruiz D, Juan A, Allegretti P, Appl. Surf. Sci., 433, 487 (2018)
Padmesh TVN, Vijayaraghavan K, Sekaran G, Velan M, Bioremediat. J., 10(1), 37 (2006)
Foo KY, Hameed BH, Chem. Eng. J., 156(1), 2 (2010)
Wolff WF, J. Phys. Chem., 63, 653 (1959)
Walker Jr PL, Carbon, 28, 261 (1990)
Frisch GW, Trucks HB, Schlegel GE, Scuseria MA, Robb JR, Cheeseman G, Scalmani V, Barone B, Mennucci GA, Gaussian 09, Gaussian, Inc., Wallingford CT, 2009.
Delgado LF, Charles P, Glucina K, Morlay C, Sci. Total Environ., 435-436, 509 (2012)
Giles CH, MacEwan TH, Nakhwa SN, Smith D, J. Chem. Soc., 3973 (1960)
Hameed BH, Tan IAW, Ahmad AL, Chem. Eng. J., 144(2), 235 (2008)
Aksu Z, Kabasakal E, Sep. Purif. Technol., 35(3), 223 (2004)
Spaltro A, Pila MN, Simonetti S, Alvarez-Torrellas S, Garcia Rodriguez J, Ruiz D, Diaz Company A, Juan A, J. Contaminant Hydrology, 218, 84 (2018)
http://www.molinspiration.com.
