Mechanistic study of diclofenac and carbamazepine adsorption on functionalized silica-based porous materials

Suriyanon, Nakorn; Punyapalakul, Patiparn; Ngamcharussrivichai, Chawalit

doi:10.1016/j.cej.2012.10.052

Cited by 201 publications

(114 citation statements)

References 44 publications

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“…These observations may be explained by the surface charge of the adsorbent materials. The pH pzc of Al-Mg/GO composites was 4.22, thus the composite was positively charged at pH 3 and negatively charged at pH 7 and 10, resulting in higher removal of negatively charged phosphate and DCF ions at lower pH and positively charged copper (II) ions at higher pH due to the enhanced electrostatic attraction [51,59,60]. This is also consistent with the pH evolution shown in Fig.…”

Section: Effects Of Ph and Different Ionssupporting

confidence: 77%

Separation-free Al-Mg/graphene oxide composites for enhancement of urban stormwater runoff quality

Ahmadi

Yang

Jones

et al. 2018

Adv Compos Hybrid Mater

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Separation-free Al-Mg/graphene oxide (Al-Mg/GO) composites were synthesized by facile one-pot hydrothermal treatment and examined for adsorptive removal of representative contaminants (phosphate, copper (II), and Diclofenac (DCF)) in urban stormwater runoff. The Al-Mg/GO composites exhibited good adsorption capacity for all three contaminants. The adsorption isotherm and kinetics are well described by Freundlich model and pseudo-second-order model, respectively. Further, adsorption of phosphate and DCF favored acidic conditions while an opposite trend was observed for copper (II), which can be ascribed to the change of surface charge of the composites at different pH. The presence of different ions commonly present in environmental matrices (humic acid, bicarbonate, and sulfate) exhibited different effects on the contaminants' removal. Bicarbonate inhibited phosphate and DCF adsorption but promoted copper (II) removal. Copper (II) adsorption was also increased through chemical complexation and electrostatic attraction as a result of humic acid/sulfate adsorption on the adsorbents. The adsorption mechanisms include electrostatic interaction for all three contaminants, Lewis acid-base interactions and surface complexation for phosphate, π-π interactions for DCF, and cation-π interactions for copper (II). More than 75% adsorption capacities were maintained after 4 cycles of adsorption/desorption/regeneration, indicating good reusability. The Al-Mg/GO composites show great potential as a multifunctional adsorptive material for urban stormwater management.

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Section: Effects Of Ph and Different Ionssupporting

confidence: 77%

Separation-free Al-Mg/graphene oxide composites for enhancement of urban stormwater runoff quality

Ahmadi

Yang

Jones

et al. 2018

Adv Compos Hybrid Mater

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“…The hybrid material precursor to the carbon nanotubes/alumina is found to be effective materials in the removal of diclofenac from aqueous solutions (Wei et al, 2013). Hexagonal mesoporous silicate (HMS) and amine mercapto-functionalized HMS are employed in the adsorptive removal of diclofenac (Suriyanon et al, 2013). Recently, Thanhmingliana and Tiwari (2015) demonstrated that bentonite intercalated with cetyltrimethyl-ammonium bromide (C16) displayed good adsorbent properties for diclofenac sodium (DS) in aqueous solution.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of ZnAl-layered double hydroxide and organo-K10 montmorillonite for the removal of diclofenac from aqueous solution

Boukhalfa

Boutahala

Djebri

2016

Adsorption Science & Technology

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Two prepared adsorbents, namely, calcined ZnAl-layered double hydroxide and K10 montmorillonite intercalated with cetyltrimethyl-ammonium bromide cations are used in diclofenac sodium adsorption under the batch reactor operations. The pseudo-second-order model describes better the results of the kinetics. Fitting parameters revealed that the rate of adsorption increased with the increase in diclofenac sodium concentration and decrease in background electrolyte concentration and temperature, while the solution pH did not have a significant effect. The maximum adsorption capacities of diclofenac obtained by Langmuir model are found to be 55.46 and 737.02 mg/g for K10 montmorillonite intercalated with cetyltrimethylammonium bromide cations and ZnAl-C LDH, respectively. The results of adsorption-desorption cycles revealed that ZnAl-C LDH and K10 montmorillonite intercalated with cetyltrimethylammonium bromide cations have an excellent potential to be used as an economical adsorbent for the removal of diclofenac sodium from water.

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“…Therefore, we attribute the higher removal rate of CBZ to the higher specific SA and PV of m-PGMA compared to MIEX V R . Similarly, Suriyanon 33 et al also determined that those adsorbents with the highest specific SA and PV and the narrowest pore size had the highest adsorption capacity. Both m-PGMA and MIEX V R possess these characteristics.…”

mentioning

confidence: 96%

“…33 Moreover, the total PV and the specific SA of m-PGMA were determined to be 0.1852 cm 3 g À1 and 40.026 m 2 g À1 , respectively. Therefore, multiple-loading tests allow sufficient space, exchange sites, and time for exchanged NOM transport into the interior of m-PGMA.…”

mentioning

confidence: 99%

Preparation and use of magnetic poly(glycidyl methacrylate) resin in drinking water treatment

Chen

Liu

2013

J of Applied Polymer Sci

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Magnetic poly(glycidyl methacrylate) (m-PGMA) was synthesized and characterized, and its efficiency in removing natural organic matter (NOM) and carbamazepine (CBZ) from synthetic water was studied. The effects of factors such as time and m-PGMA dosage on NOM removal were investigated. Furthermore, magnetic ion exchange resin (MIEX V R ) was used for comparison with m-PGMA in CBZ removal. m-PGMA was found to have a strong magnetic character whose specific saturation magnetization and mass fraction of magnetite were 10.79 emu g À1 and 6.166 wt %, respectively, thus providing additional utility for m-PGMA in slurry form in completely mixed continuous-flow reactors. Lab-scale studies showed that the removal rate rose rapidly with time and reached a pseudo-equilibrium after 30 min. In addition, the highest doses of m-PGMA achieved the highest removal efficiency. After 30 min of contact with 5, 10, and 15 mL L À1 of m-PGMA, the removal rates, based on UV absorbance measurements at 254 nm (UV 254 ), were 56%, 67%, and 79%, respectively, whereas the removal rates of dissolved organic carbon (DOC) were 53%, 60%, and 72%, respectively. Additionally, the scale ultraviolet absorbance values (SUVA) decreased during a 30 min contact time, thereby suggesting that the NOM removed by m-PGMA had greater aromatic character. In multiple-loading tests, UV 254 removal gradually decreased and achieved 18.39% at 1600 bed volume; it was kept constant at this level. Compared to MIEX V R , m-PGMA had a higher CBZ removal rate (27.8% and 34.7% for 20 mL L À1 and 25 mL L À1 of m-PGMA, corresponding to the removal of 200 lg L À1 CBZ).The resulting higher removal rate of CBZ contributed to stronger adsorption, a higher specific surface area, and larger pore volume.

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Mechanistic study of diclofenac and carbamazepine adsorption on functionalized silica-based porous materials

Cited by 201 publications

References 44 publications

Separation-free Al-Mg/graphene oxide composites for enhancement of urban stormwater runoff quality

Separation-free Al-Mg/graphene oxide composites for enhancement of urban stormwater runoff quality

Synthesis and characterization of ZnAl-layered double hydroxide and organo-K10 montmorillonite for the removal of diclofenac from aqueous solution

Preparation and use of magnetic poly(glycidyl methacrylate) resin in drinking water treatment

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