Adsorption characteristics of beta-lactam cefixime onto nanosilica fabricated from rice HUSK with surface modification by polyelectrolyte

Pham, Tien Duc; Bui, Thu Thuy; Truong, Thi Thuy Trang; Hoang, Thu Ha; Le, Thanh Son; Duong, Viet Dung; Yamaguchi, Atsushi; Kobayashi, Motoyoshi; Adachi, Yasuhisa

doi:10.1016/j.molliq.2019.111981

Cited by 68 publications

(34 citation statements)

References 53 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The adsorbent dosage is effective effect on the adsorption process, because it influences the total surface area and charge density of the adsorbent [4,[41][42][43]. The dosage of ProMNS varied from 1.0 to 50.0 mg/mL (Figure 9).…”

Section: Effect Of Adsorbent Dosagementioning

confidence: 99%

“…Nevertheless, one unexpected thing is that CFX resistance is rapidly increasing to seriously high levels in developing countries. The antibiotic residual including CFX is also very toxic to organisms in an aquatic environment although the concentrations are low [4]. and KOH (p.A, Merck) were used to study the effect of ionic strength and adjust pH solution.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Adsorptive Removal of Antibiotic Ciprofloxacin from Aqueous Solution Using Protein-Modified Nanosilica

Pham

Nguyen

et al. 2020

Polymers

Self Cite

View full text Add to dashboard Cite

The present study aims to investigate adsorptive removal of molecular ciprofloxacin using protein-modified nanosilica (ProMNS). Protein was successfully extracted from Moringa seeds while nanosilica was synthesized from rice husk. Fourier-transform infrared (FTIR), ultraviolet visible (UV-Vis) and high-performance liquid chromatography (HPLC) were used to evaluate the characterization of protein. Adsorption of protein onto nanosilica at different pH and ionic strength was thoroughly studied to modify nanosilica surface. The removal efficiency of antibiotic ciprofloxacin (CFX) increased from 56.84% to 89.86% after surface modification with protein. Effective conditions for CFX removal using ProMNS were systematically optimized and found to be pH 7.0, adsorption time 90 min, adsorbent dosage 10 mg/mL, and ionic strength 1 mM KCl. A two-step model was successfully used to fit the adsorption isotherms of CFX onto ProMNS at different ionic strength while a pseudo-second-order model could fit adsorption kinetic of CFX onto ProMNS very well. Maximum adsorption capacity was very high that reached to 85 mg/g. Adsorption of CFX onto ProMNS decreased with increasing KCl concentration, suggesting that adsorption of CFX onto ProMNS is mainly controlled by electrostatic attraction between positively charged ProMNS surface and anionic species of CFX. Adsorption mechanisms of CFX onto ProMNS were discussed in detail based on adsorption isotherms, the change in surface charge by zeta potentail and the change in functional groups by FT-IR. The removal of CFX after three regenerations was greater than 73% while CFX removal from an actual hospital wastewater using ProMNS reached to 70%. Our results suggest that ProMNS is a new and eco-friendly adsorbent to remove antibiotics from aqueous solutions.

show abstract

Section: Effect Of Adsorbent Dosagementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Adsorptive Removal of Antibiotic Ciprofloxacin from Aqueous Solution Using Protein-Modified Nanosilica

Pham

Nguyen

et al. 2020

Polymers

Self Cite

View full text Add to dashboard Cite

show abstract

“…In addition to symmetric and asymmetric stretching of –SO 2 -, strong peaks at 1450–1600 cm −1 and 3200–3400 cm −1 correspond to the bending vibrations of –NH– and stretching of NH 2 - (symmetric and asymmetric) in DDS, respectively [ 31 , 32 ]. The FT-IR spectrum of unmodified silica particles also demonstrated clear peaks at 1075 cm −1 ,798 cm −1 and 470 cm −1 responsible for the asymmetric, symmetric as well as bending modes of SiO 2 along with peak at 3400 cm −1 , due to the –OH stretching of silanol groups [ 33 , 34 , 35 ].…”

Section: Resultsmentioning

confidence: 99%

Remarkable enhancement of thermal stability of epoxy resin through the incorporation of mesoporous silica micro-filler

Yeasmin

Mallik

Chisty

et al. 2021

Heliyon

View full text Add to dashboard Cite

For the first time, we incorporated mesoporous micro-silica (5 μm, pore size ¼ 50 nm) as a filler in epoxy resin aiming to enter polymer into the pore of the silica. As expected, the thermal stability of the composite increased remarkably, followed by noteworthy thermal degradation kinetics when compared to the controlled cured epoxy resin. Composites were prepared by the direct dispersion of modified nano-silica, modified mesoporous microsilica, unmodified mesoporous micro-silica, non-porous micro-silica, and irregular micro-silica of various pore sizes as fillers in diglycidyl ether of bisphenol-A epoxy resin via ultra-sonication and shear mixing, followed by oven-curing with 4,4-diaminodiphenyl sulfone. DSC and TGA analyses demonstrated a higher glass transition temperature (increased by 3.65-5.75 C) and very high activation energy for thermal degradation (average increase ¼ 46.2%) was obtained for the same unmodified silica composite compared to pure epoxy, respectively.

show abstract

“…As can be seen in Figure 9C, the lindane removal using SMNAH increased with increasing the adsorbent dosage from 0 to 25 mg/mL due to the increase in total charge density and binding sites. However, a high amount of adsorbent may induce the fast flocculation of nanoparticles [41,42]. Therefore, the optimum adsorbent dosage was 25 mg/mL.…”

Section: Adsorptive Removal Of Lindane Using Surfactant-modified Nanomentioning

confidence: 99%

Removal of Lindane from Aqueous Solution Using Aluminum Hydroxide Nanoparticles with Surface Modification by Anionic Surfactant

Nguyễn

Pham

et al. 2020

Polymers

Self Cite

View full text Add to dashboard Cite

In the present study, we investigated the removal of an emerging pesticide lindane from aqueous solution using synthesized aluminum hydroxide Al(OH)3 (bayerite) nanomaterials with surface modification by an anionic surfactant sodium dodecyl sulfate (SDS). The Al(OH)3 nanoparticles were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), Brunauer–Emmett–Teller (BET) and zeta potential. The lindane removal using SDS-modified nano-aluminum hydroxide nanoparticles (SMNAH) achieved removal of up to 93.68%, which was 3.3 times higher than that of nano-aluminum hydroxide nanoparticles. The adsorptive removal conditions were studied and found to have an adsorption time of 60 min, a pH of 6, an adsorbent dosage of 25 mg/mL and an ionic strength of 10 mM NaCl. After reusing four times, the removal efficiency of lindane using SMNAH still reached 75%. Two-step adsorption can fit adsorption isotherms of lindane onto SMNAH at two salt concentrations. On the basis of the change in zeta potential, surface functional groups and adsorption isotherms, we suggest that the formation of a bilayer micelle induced the removal of lindane.

show abstract

Adsorption characteristics of beta-lactam cefixime onto nanosilica fabricated from rice HUSK with surface modification by polyelectrolyte

Cited by 68 publications

References 53 publications

Adsorptive Removal of Antibiotic Ciprofloxacin from Aqueous Solution Using Protein-Modified Nanosilica

Adsorptive Removal of Antibiotic Ciprofloxacin from Aqueous Solution Using Protein-Modified Nanosilica

Remarkable enhancement of thermal stability of epoxy resin through the incorporation of mesoporous silica micro-filler

Removal of Lindane from Aqueous Solution Using Aluminum Hydroxide Nanoparticles with Surface Modification by Anionic Surfactant

Contact Info

Product

Resources

About