Elimination of persistent anthropogenic pollutants by micro-mesoporous carbon xerogels. Natural organic matter on surface water and textural properties influences

Lladó, Jordi; Lao-Luque, Conxita; Solé-Sardans, Montserrat; Montemurro, Nicola; Pérez, Sandra; Fuente, E.; Ruiz, B.

doi:10.1016/j.jece.2020.104885

Cited by 11 publications

(2 citation statements)

References 58 publications

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“…Technologies based on adsorption onto activated carbons are an example of those processes which also present the advantage of being easily implemented in the existing plants [3], as proved in a full-scale addition of powdered activated carbon to the activated sludge reactor of an urban wastewater treatment plant, during the recently developed LIFE Impetus project [4]. The data gathered not only through academic studies [5][6][7][8][9] but also when these processes were implemented in the wastewater treatment plants prove that this is a viable method to improve effluents quality, namely regarding the removal of pharmaceutical compounds [4,10,11]. Therefore, our group has been interested in testing new precursors and alternative preparation methodologies to obtain highly porous activated carbons that could be considered candidates for the removal of recalcitrant compounds.…”

Section: Introductionmentioning

confidence: 99%

Steam Activation of Acid-Chars for Enhanced Textural Properties and Pharmaceuticals Removal

et al. 2022

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The present work aims to explore steam activation of sisal or glucose-derived acid-chars as an alternative to KOH activation to prepare superactivated carbons, and to assess the adsorption performance of acid-chars and derived activated carbons for pharmaceuticals removal. Acid-chars were prepared from two biomass precursors (sisal and glucose) using various H2SO4 concentrations (13.5 M, 12 M, and 9 M) and further steam-activated at increasing burn-off degrees. Selected materials were tested for the removal of ibuprofen and iopamidol from aqueous solution (kinetic and equilibrium assays) in single-solute conditions. Activated carbons prepared from acid-char carbonized with 13.5 M and 12 M H2SO4 are mainly microporous solids composed of compact rough particles, yielding a maximum surface area and a total pore volume of 1987 m2 g−1 and 0.96 cm3 g−1, respectively. Solid state NMR reveals that steam activation increased the aromaticity degree and amount of C=O functionalities. Steam activation improved the acid-chars adsorption capacity for ibuprofen from 20-65 mg g−1 to higher than 280 mg g−1, leading to fast adsorption kinetics (15–20 min). The maximum adsorption capacities of selected activated samples for ibuprofen and iopamidol were 323 and 1111 mg g−1, respectively.

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Section: Introductionmentioning

confidence: 99%

Steam Activation of Acid-Chars for Enhanced Textural Properties and Pharmaceuticals Removal

et al. 2022

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“…Thus, the question of how to attain high removal efficiency of HA needs further investigation. Adsorption is regarded as one of the most promising methods for removing HA, due to its high efficiency, simplicity and through it being easy to recover and operate [12,13]. Up to now, there many adsorption materials were studied for use in HA removal, such as carbon nanotubes [14], activated carbon [15], graphene [16], resin [17], bentonite [18], kaolin [19], zeolite [20], iron oxide [21], alumina [22] and MOFs [23,24].…”

Section: Introductionmentioning

confidence: 99%

Effective Removal of Humic Acid by Zr-MOFs with Surface Modification

Jiang

Wang

Zhu

et al. 2022

Water

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Humic acid (HA) in makeup water is one of the important safety issues of high−parameter power plants. Herein, the Zr−based metal organic frameworks (Zr−MOFs) were applied to remove humic acid in water. The mesoporous and active sites of Zr−MOFs were controlled by different ratios of ligands to increase the adsorption of HA. The maximum adsorption capacity was 150.15 mg g−1. The morphology and adsorption properties of the Zr−MOFs were characterized using scanning electron microscopy (SEM), X−ray diffraction (XRD), surface charge, Fourier Transform infrared (FT−IR), N2 adsorption−desorption and adsorption test. The adsorption process of HA accorded with the pseudo−second−order kinetics, while the adsorption isotherm conformed to the Langmuir model and the adsorption was proved to be a spontaneous and endothermic process. Physical adsorption by the mesoporous materials and the hydrogen bonding interactions between the Zr−MOFs and HA were the driving forces of HA adsorption. These results provided useful information for the effective removal of HA and enhanced our understanding of the adsorption mechanism of HA on Zr−MOFs.

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