Chitosan hydrogel synthesis to remove arsenic and fluoride ions from groundwater

Burillo, Juan Carlos; Ballinas-Casarrubias, Lourdes; Burillo, Guillermina; Guerrero-Lestarjette, Ernesto; Lardizábal-Gutiérrez, D.; Silva-Hidalgo, Humberto

doi:10.1016/j.jhazmat.2021.126070

Cited by 36 publications

(5 citation statements)

References 59 publications

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“…Hence, the World Health Organization (WHO), in agreement with the U.S. Environmental Protection Agency (US-EPA), recommended 0.01 mg/L as an arsenic concentration limit for drinking water (Maity et al 2021). However, in some countries, like Mexico, the regulations are more flexible, and the permissible arsenic level for drinking water has been set at 0.025 mg/L (Burillo et al 2021).…”

Section: Introductionmentioning

confidence: 99%

Removal of As(V) from aqueous solutions using calcium-alginate microspheres with encapsulated iron nanoparticles

Ruiz-Mora

Alfaro-Cuevas-Villanueva

Martínez-Miranda

et al. 2021

Water Supply

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This work investigated As(V) removal from aqueous solutions using calcium alginate microspheres with encapsulated iron nanoparticles (FeNPs) in batch systems. The kinetic, equilibrium, and thermodynamic parameters of the adsorption process were evaluated. Adsorbents were characterized using Fourier Transform Infrared Spectroscopy, Scanning Electron Microscopy, and Zeta Potential techniques. The FeNPs were obtained by a simple and low-cost method and they were successfully encapsulated and uniformly dispersed over the microspheres' surface. Significantly fast adsorption kinetic rates were observed due to microspheres' particle size and FeNPs encapsulation. The chemisorption mechanism was recognized in both adsorbate-adsorbent systems. The As(V) isotherms data suggested that the process is associated with heterogeneous adsorption. Available sorption sites with different adsorption energies were related to the functional groups involved in removing As(V), such as hydroxyl and carboxyl groups. Significantly high adsorption capacities were obtained for both materials, suggesting they can be competitive compared to conventional adsorbents, even at low FeNPs concentrations. Besides FeNPs encapsulation enhancing arsenate removal, higher adsorption was obtained at slightly acidic pH values and, together with their small particle size, suggests that the microspheres have a great potential to be used as arsenate adsorbents in the water treatment for human consumption.

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Section: Introductionmentioning

confidence: 99%

Removal of As(V) from aqueous solutions using calcium-alginate microspheres with encapsulated iron nanoparticles

Ruiz-Mora

Alfaro-Cuevas-Villanueva

Martínez-Miranda

et al. 2021

Water Supply

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“…A la fecha, existen más de 320 de estos sistemas en comunidades donde el agua excede los límites de As, F y salinidad, las cuales se ubican principalmente en zonas áridas y semiáridas del estado (Espino-Valdés, 2019). Se han publicado diversos estudios relativos a los procesos de tratamiento que se pueden utilizar para sustituir o usar en combinación con el de ósmosis inversa, los cuales incluyen adsorción en materiales como cáscara de nuez (Ali et al, 2020), cáscara de huevo (Andrade et al, 2021), partículas de hidrogel (Burillo et al, 2021) y destilación solar (Espino-Valdés et al, 2019). Los dos últimos tratamientos se han realizado con éxito en el estado de Chihuahua a nivel de planta piloto.…”

Section: Procesos De Remoción De As Y Funclassified

Arsénico y flúor en agua subterránea de Chihuahua: su origen, enriquecimiento, y tratamientos posibles

Gutiérrez

Valdés

Herrera³

et al. 2021

tecnociencia

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La presencia de arsénico (As) y flúor (F) en agua subterránea es un problema global que afecta a una gran cantidad de personas en cinco continentes. Estudios al respecto reportan el contenido de As y F en agua, rocas y sedimentos, así como los factores que causan su enriquecimiento. Una cantidad de investigaciones, a la par de extensa, reporta las maneras de maximizar la eficiencia de los diversos tratamientos de agua. La ingesta crónica de agua con niveles altos de As y F causa graves trastornos a la salud. Es entonces necesario encontrar tratamientos efectivos que reduzcan el contenido de estos contaminantes dentro de las condiciones y recursos disponibles. En el presente artículo se hace una síntesis de la información reportada sobre el contenido de As y F en agua subterránea y las condiciones que causan su enriquecimiento. Se compara el caso de Chihuahua con otras zonas que cuentan con geología y clima similares. Se puntualizan tratamientos aplicados para su eliminación del agua de consumo y se discuten procesos de remoción no-convencionales y a escalas de laboratorio que podrían utilizarse con éxito.

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“…At present, many technical means have been developed to recover uranium, including ion exchange, adsorption, − chemical precipitation, and membrane separation, among which adsorption is considered the most promising method. To date, various materials with high specific surface area or porous structures have been employed as adsorbents for uranium recovery, such as carbon materials (graphene oxide, carbon nanotubes, and mesoporous carbon), polymer materials (resins and chitosan), and porous frame materials (metal–organic frameworks , and covalent organic frameworks). , In view of the low uranyl ion content and complicated ionic environment of nuclear wastewater, the adsorbents need to possess good selectivity, stability, high adsorption capacity, and high removal percentage at low concentrations. More importantly, the adsorbent can be packed into a fixed-bed column for use as in actual wastewater treatment.…”

Section: Introductionmentioning

confidence: 99%

Hierarchical Self-Assembled Polyimide Microspheres Functionalized with Amidoxime Groups for Uranium-Containing Wastewater Remediation

Zhu

Zhang

et al. 2023

ACS Appl. Mater. Interfaces

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Through molecule self-assembly and subsequent surface functionalization, novel uranium adsorbent AO−OB hierarchical self-assembled polyimide microspheres (AO-OBHSPIMs) were obtained by introducing the amidoxime groups into hierarchical self-assembled polyimide microspheres for the efficient and selective recovery of uranium from wastewater. The results of Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), X-ray diffraction (XRD), and nitrogen adsorption−desorption isotherm showed that AO-OBHSPIMs were a semicrystalline polymer material with self-supporting hierarchical structure and low pore volume, and they were equipped with abundant amidoxime groups. Given the recognized selectivity of amidoxime groups and their hierarchical structure, AO-OBHSPIMs exhibited excellent selectivity to uranyl ions. Moreover, AO-OBHSPIMs exhibited good stability and recyclability and remarkable removal percentage within lowconcentration solution (99.4%) and simulated uranium-containing wastewater (97.3%). AO-OBHSPIMs could be applied to fixedbed column adsorption due to their large particle size and self-supporting hierarchical structure that can facilitate water flow. The indepth discussion of the adsorption mechanism showed that the adsorption mainly depended on the combined action of electrostatic interactions and complexation, and the adsorption process was a spontaneous endothermic monolayer adsorption. In summary, AO-OBHSPIMs exhibited good application prospects in uranium-containing wastewater remediation.

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Chitosan hydrogel synthesis to remove arsenic and fluoride ions from groundwater

Cited by 36 publications

References 59 publications

Removal of As(V) from aqueous solutions using calcium-alginate microspheres with encapsulated iron nanoparticles

Removal of As(V) from aqueous solutions using calcium-alginate microspheres with encapsulated iron nanoparticles

Arsénico y flúor en agua subterránea de Chihuahua: su origen, enriquecimiento, y tratamientos posibles

Hierarchical Self-Assembled Polyimide Microspheres Functionalized with Amidoxime Groups for Uranium-Containing Wastewater Remediation

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