Adsorptive removal of selected pharmaceuticals by mesoporous silica SBA-15

Bui, Tuyen; Choi, Heechul

doi:10.1016/j.jhazmat.2009.02.072

Cited by 342 publications

(221 citation statements)

References 34 publications

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“…Several researchers have demonstrated that the adsorption of CA on solids is mainly based on electrostatic interaction [40,41]. Therefore, the adsorption of CA on MnO x /SBA-15 was slightly promoted at pK a < pH < pH PZC as shown in Fig.…”

Section: Effect Of Initial Phmentioning

confidence: 91%

Mechanism for enhanced degradation of clofibric acid in aqueous by catalytic ozonation over MnO /SBA-15

Sun

et al. 2015

Journal of Hazardous Materials

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Section: Effect Of Initial Phmentioning

confidence: 91%

Mechanism for enhanced degradation of clofibric acid in aqueous by catalytic ozonation over MnO /SBA-15

Sun

et al. 2015

Journal of Hazardous Materials

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“…The molecule interactions between MB and Schiff-base/SBA-15 nanoadsorbent during the adsorption process are schematically represented in Scheme 2. In higher pH, both the hydrogen bonding and electrostatic interactions cause an efficient removal of MB from wastewater samples (Bui and Choi 2009). Different adsorption of MB regarding the initial solution pH can also be described on the basis of the structure of MB molecule and adsorbent point of zero charge (pH ZPC ).…”

Section: Effect Of Ph On Adsorptionmentioning

confidence: 99%

“…These two models can be expressed in linear form as Eqs. (5) and (6), respectively (Bui and Choi 2009;Wang et al 2013). …”

Section: Kinetic Modelsmentioning

confidence: 99%

“…SBA-15 materials have ordered mesoporous silica features with larger and tailored mesoporous pore diameters, which the pore sizes can be controlled from 3 to 20 nm. They have also thicker walls in the region of 4 nm which let easier convenience of more species to the inner surface of the material and lead to fast chemical or physical processes (Bui and Choi 2009;Ghaedi et al 2014a, b, c;Anbia and Amirmahmoodi 2011;Yan et al 2013;Da'na and Sayari 2011). Furthermore, they can be modified with organic groups to tailor their properties and reach specific functions (Ghaedi et al 2014a, b, c;Wang et al 2013).…”

Section: Introductionmentioning

confidence: 99%

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Synthesis and characterization of a novel Schiff-base/SBA-15 nanoadsorbent for removal of methylene blue from aqueous solutions

Bardajee

Hooshyar

Shahidi

2014

Int. J. Environ. Sci. Technol.

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A novel Schiff-base/SBA-15 nanoadsorbent was successfully synthesized by the reaction of salicylaldehyde and (3-aminopropyl) trimethoxysilane in methanol and subsequent grafting with SBA-15. The morphology and structures of the as-synthesized Schiff-base/SBA-15 nanoadsorbent were characterized by powder X-ray diffraction, transmission electron microscopy, Fourier transform infrared spectroscopy, thermo-gravimetric analysis, and N 2 adsorption/desorption isotherms. The obtained Schiff-base/SBA-15 nanoadsorbent was used for the removal of methylene blue (MB) from aqueous solutions. The effects of various parameters such as temperature, concentration, pH, and contact time were examined, and optimal experimental conditions were determined. The equilibrium isotherms were conducted using Freundlich and Langmuir models. The pseudo-first-order, pseudosecond-order, and intraparticle diffusion models were used to fit adsorption data in the kinetic studies. The thermodynamic parameters such as the standard enthalpy, standard entropy, and standard free energy were evaluated. The obtained results indicated that the Schiff-base/SBA-15 nanoadsorbent is an efficient adsorbent for removing MB.

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“…Although adsorption assays targeting pharmaceuticals are less abundant than for other classes of organic pollutants (such as pesticides, PAHs, dyes or phenolic compounds), there is a general perception from the available literature that many clay materials may be effective for the removal of most pharmaceuticals from water [16,[21][22][23][24][41][42][43][44][45][46]. However, not much data is currently available on the use of these two materials, LECA and exfoliated vermiculite in particular, for the latter type of application.…”

Section: Introductionmentioning

confidence: 99%