2,4-D adsorption from agricultural subsurface drainage by canola stalk-derived activated carbon: insight into the adsorption kinetics models under batch and column conditions

Environmental Science and Pollution Research International
Mohammad Javad AmiriAlireza Abbaspourrad

Abstract

In this study, the experimental and kinetic modeling investigations were performed to evaluate the ability of mesoporous and microporous canola stalk-derived activated carbon (CSAC) on 2,4-dichlorophenoxyacetic acid (2,4-D) removal from synthetic and natural water in both batch and continuous systems. Three empirical models (pseudo-first-order equation (PFOE), pseudo-second-order equation (PSOE), and the Elovich equation (EE)) and three theoretical models (film diffusion model (FDM), particle diffusion model (PDM), and second-order chemical reaction rate model (SOCRRM)) were compared in terms of diffusion coefficients, maximum 2,4-D adsorption, and rate constants at various operating conditions. CSAC was prepared at 600 °C and activated with water steam under a controlled flow and subsequently characterized by various analytical methods. The results showed that the maximum 2,4-D uptake by CSAC was achieved as 135.8 mg g-1 under a pH of 2 and an initial 2,4-D concentration of 150 mg L-1. The CSAC removed 38.3% of Na+, 43.49% of K+, 8.96% of Mg2+, 45.14% of Ca2+, 17.2% of Cl-1, 39.48% of HCO3-, 63.74% of SO42-, and 100% of the herbicide from agricultural subsurface drainage water and also retained its usability after regenerated ...Continue Reading

References

Jun 29, 2004·Journal of Colloid and Interface Science·Saeid Azizian
Jan 23, 2009·Journal of Hazardous Materials·N DizgeM Kobya
Sep 9, 2009·Advances in Colloid and Interface Science·Wojciech PlazinskiAnita Plazinska
Jan 14, 2017·Ecotoxicology and Environmental Safety·S Nethaji, A Sivasamy
Jan 16, 2017·Journal of Colloid and Interface Science·M ArshadiA Khalafi-Nezhad
Oct 7, 2018·Environmental Science and Pollution Research International·Mohammad Javad AmiriAntonio Gil
Dec 1, 2018·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Mehdi BahramiBahareh Beigzadeh

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