Chromium(VI) removal from aqueous medium by maize cane and agave bagasse biomasses

Marín-Allende, M. J.; Romero-Guzmán, Elizabeth Teresita; Ramírez-García, J. J.; Reyes-Gutiérrez, Lázaro Raymundo

doi:10.1080/02726351.2016.1194350

Cited by 4 publications

(3 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It can be seen from the statistic values of R 2 , RSS and χ 2 that the adsorption process follows the pseudo‐second‐order model. The best‐fitting models suggest that the present adsorption process is a chemisorption involving valence forces through sharing or exchange of electrons between the composite and atrazine molecules. According to the pseudo‐second‐order model, the process takes place on a very heterogeneous surface.…”

Section: Resultsmentioning

confidence: 98%

Magnetic sugarcane bagasse composite for atrazine and fluoride removal

Helen

Blanco-Flores

López-Téllez

et al. 2019

J of Chemical Tech & Biotech

View full text Add to dashboard Cite

BACKGROUND: The present investigation focuses on the synthesis and application of a magnetic adsorbent material formed by the agro-industrial waste sugarcane bagasse (SCB). Its application in the removal of fluoride and atrazine demonstrates its properties as a potential adsorbent material for the treatment of contaminated wastewater. RESULTS:The synthesis method proved to be simple and reproducible. The presence and distribution of magnetite and fluoride on the surface of the material were studied by characterization techniques (SEM, EDX, FTIR-ATR). Several specific functional groups were identified which may interact with atrazine and fluoride molecules in the adsorption process. Kinetic results indicated that second-and pseudo-second-order model fitted better for the fluoride and atrazine adsorption processes, respectively. The adsorption processes took place by chemisorption onto heterogeneous surfaces. Isotherm data fitted better to the Langmuir-Freundlich model in both systems; therefore, the process took place by a combination of mechanisms. Cellulose and lignin from sugarcane bagasse contribute in the adsorption process, while magnetite not only improve performance of composite for the removal of the chemical species tested, but also achieve a simple separation process via magnetic interactions' with a common magnet. The adsorption capacities of the composites were 0.5036 mg g −1 for fluoride and 40.11 mg g −1 for atrazine. CONCLUSION: The synthesis of the magnetic composite is simple and generates a material that is easy to manipulate and isolate after the process. The affinity of the composite with atrazine is greater than with fluoride; however, the composite can be used in systems with low concentration.

show abstract

Section: Resultsmentioning

confidence: 98%

Magnetic sugarcane bagasse composite for atrazine and fluoride removal

Helen

Blanco-Flores

López-Téllez

et al. 2019

J of Chemical Tech & Biotech

View full text Add to dashboard Cite

show abstract

“…The use of these waste material as adsorbent also reduces the cost of the Cr(VI) treatment process and makes the application of adsorption technology. The physicochemical and surface characteristics of this biomass and sorption properties, that make it a candidate to absorb Cr(VI) are reported by Marin-Allende et al, 2017 [9].…”

Section: Introductionmentioning

confidence: 82%

“…(7) (8) where ε is the porosity, c is the solute concentration [M L -3 ], t is the time [t], ρ b is the density of the porous medium [M L -3 ], cp is the concentration of the solute sorbed in the biomass (the mass amount of solute sorbed per unit of biomass), v is the velocity [L t -1 ], D L is the hydrodynamic dispersion tensor, KF and N are constants of Freunlich isotherms (COMSOL 2008). The equation used for flow and transport in porous medium in this simulation is obtained from equation (7), which is written as follows: (9) where the reaction terms are removed if there are no chemical reaction.…”

Section: Generating Of the Geometrymentioning

confidence: 99%

Experimental and Numerical Comparison of Dispersion and Sorption of Cr(VI) on Maize Cane Biomass

Marín-Allende,

Romero-Guzmán,

Alvarado-Rodríguez

et al. 2024

J. Mex. Chem. Soc.

View full text Add to dashboard Cite

Abstract. Computational and theoretical modelling has become an important tool for the characterization, development, and validation of packed beds. Relevant breakthrough curves would provide much valuable information on designing a fixed bed adsorption process in field applications. In this study, the hydrodynamic properties involved in the Navier–Stokes flow equation, such as velocity, pressure, and permeability, in a packed bed were investigated. Experiments in natural porous media such as maize cane biomass for determining the sorption of Cr(VI) are compared with numerical simulations. The relevant ordinary partial equations were solved in COMSOL Multiphysics Software friendly and efficiently. The close agreement between the experimental and numerical results suggests that the theoretical model of advection-hydrodynamic dispersion can be used to model the transport of Cr(VI) in unsaturated porous media composed of maize cane biomass. Resumen. El modelado computacional y teórico se ha convertido en una herramienta importante para la caracterización, desarrollo y validación de lechos empacados. Las curvas de avance relevantes proporcionarían información muy valiosa sobre el diseño de un proceso de adsorción de lecho fijo en aplicaciones de campo. En este estudio, se investigaron las propiedades hidrodinámicas involucradas en la ecuación de flujo de Navier-Stokes, como la velocidad, la presión y la permeabilidad, en un lecho empacado. Los experimentos en medios porosos naturales como la biomasa de caña de maíz para determinar la sorción de Cr(VI) se comparan con simulaciones numéricas. Las ecuaciones parciales ordinarias relevantes se resolvieron en COMSOL Multiphysics Software de manera amigable y eficiente. La estrecha concordancia entre los resultados experimentales y numéricos sugiere que el modelo teórico de dispersión hidrodinámica por advección puede usarse para modelar el transporte de Cr(VI) en medios porosos no saturados compuesta por biomasa de caña de maíz.

show abstract