Single and multi-component adsorption of salicylic acid, clofibric acid, carbamazepine and caffeine from water onto transition metal modified and partially calcined inorganic–organic pillared clay fixed beds

Cabrera-Lafaurie, Wilman A.; Román, Francisco; Hernández‐Maldonado, Arturo J.

doi:10.1016/j.jhazmat.2014.03.009

Cited by 53 publications

(22 citation statements)

References 73 publications

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“…describe adsorption kinetics and the maximum adsorption capacity [32,38,51]. In the present study, these three models have been studied to find out the best model describing the adsorption in column.…”

Section: Bed Depth Service Time (Bdst) Thomas and Yoon-nelson Modelmentioning

confidence: 99%

Pre-concentration of nalidixic acid through adsorption–desorption cycles: Adsorbent selection and modeling

Patiño

Dı́az

Ordóñez

2016

Chemical Engineering Journal

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Section: Bed Depth Service Time (Bdst) Thomas and Yoon-nelson Modelmentioning

confidence: 99%

Pre-concentration of nalidixic acid through adsorption–desorption cycles: Adsorbent selection and modeling

Patiño

Dı́az

Ordóñez

2016

Chemical Engineering Journal

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“…Sotelo et al have investigated caffeine removal via adsorption onto various carbon materials and found an adsorption capacity of 270 mg/g. 8−10 Cabrera−Lafauri et al 11,12 verified that in the presence of Co, Cu, and Ni, inorganic− organic pillared clays had increased capacity to remove caffeine. Okada et al 13 have recently reported increased and decreased caffeine uptake by clays functionalized with benzylamine hydrochloride and neostigmine bromide, respectively.…”

Section: ■ Introductionmentioning

confidence: 99%

Organically Modified Saponites: SAXS Study of Swelling and Application in Caffeine Removal

Marçal

Faria

Nassar

et al. 2015

ACS Appl. Mater. Interfaces

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This study aimed to assess the capacity of saponite modified with n-hexadecyltrimethylammonium bromide (CTAB) and/or 3-aminopropyltriethoxysilane (APTS) to adsorb and remove caffeine from aqueous solutions. Powder X-ray diffraction (PXRD) revealed increased basal spacing in the modified saponites. Small-angle X-ray scattering (SAXS) confirmed the PXRD results; it also showed how the different clay layers were stacked and provided information on the swelling of natural saponite and of the saponites functionalized with CTAB and/or APTS. Thermal analyses, infrared spectroscopy, scanning electron microscopy, element chemical analysis, and textural analyses confirmed functionalization of the natural saponite. The maximum adsorption capacity at equilibrium was 80.54 mg/g, indicating that the saponite modified with 3-aminopropyltriethoxysilane constitutes an efficient and suitable caffeine adsorbent.

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“…On the other hand, Figure 8 shows that increasing the feed flow rate leads to a steeper breakthrough curve, since contact time between solution and solid is too short, resulting in a reduction in the breakthrough time. In this case, the solute has not enough time to interact with the surface of the adsorbent and diffuse into the pores, particularly with large molecules such as those of organic compounds, thus adsorption is limited (Cabrera-Lafaurie, Román, and Hernández-Maldonado, 2015). This behavior is more evident in the CXM sample (Figure 8b) than in the CX sample ( Figure 8a), which could also be explained by the TiO 2 blocking active sites.…”

Section: Continuous Experimentsmentioning

confidence: 99%

Removal of acetylsalicylic acid (ASA) in packed microcolumns with carbon xerogel modified with TiO2 nanoparticles

2019

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The adsorption capacity of acetylsalicylic acid was evaluated using carbon xerogel (CX) and carbon xerogel modified with TiO2 nanoparticles (CXM). These materials were characterized by different techniques such as Scanning Electron Microscopy (SEM), X-Ray Diffraction (XRD), and Fourier Transform Infrared (FTIR) spectroscopy. BET surface area measurements found values of 762 m2/g and 214 m2/g for CX and CXM, respectively. Batch experiments show that the Langmuir-Freundlich model best represents the experimental adsorption isotherm, in addition to show a maximum adsorption capacity of 17,48 mg/g. In continuous experiments, the effect of the inlet concentration and flow rate on the adsorption capacity of the micro-packed bed adsorber were evaluated. Breakthrough curves agree well with the axial dispersion model. In view of their adsorption capacity, carbon xerogels provide a potential material for the removal of emergent contaminants from the pharmaceutical industry. Besides, the incorporation of TiO2 nanoparticles allows the implementation of complementary techniques, e.g. photodegradation, as an alternative to achieve higher elimination of aqueous contaminants.

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Single and multi-component adsorption of salicylic acid, clofibric acid, carbamazepine and caffeine from water onto transition metal modified and partially calcined inorganic–organic pillared clay fixed beds

Cited by 53 publications

References 73 publications

Pre-concentration of nalidixic acid through adsorption–desorption cycles: Adsorbent selection and modeling

Pre-concentration of nalidixic acid through adsorption–desorption cycles: Adsorbent selection and modeling

Organically Modified Saponites: SAXS Study of Swelling and Application in Caffeine Removal

Removal of acetylsalicylic acid (ASA) in packed microcolumns with carbon xerogel modified with TiO2 nanoparticles

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