Removal of Cefdinir from Aqueous Solution Using Nanostructure Adsorbents of TiO2, SiO2 and TiO2/SiO2

Yener, H. Banu

doi:10.15255/cabeq.2019.1632

Cited by 4 publications

(4 citation statements)

References 33 publications

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“…Also, this process is physical because for physical adsorption ∆ H 0 < 35.0 kJ mol −1 and chemical adsorption ∆ H 0 > 35.0 kJ mol −1 . Δ S 0 values were determined to be 130, 27, and 84 J mol −1 K −1 for raw AC, CHT:AEO, and CHT:AEO:AC, respectively, and the positive Δ S 0 values reflect increased randomness at the solid–liquid interface during the process (Yener, 2019). Also, the negative ∆ G 0 values show that the naproxen adsorption on all biocomposites is feasible and spontaneous.…”

Section: Resultsmentioning

confidence: 99%

Removal of naproxen from wastewater using chitosan–aerogel–activated carbon biocomposites: Theory, equilibrium, kinetics, thermodynamics, and process optimization

Ozcan

Yalcin

Şimşek

et al. 2022

Water Environment Research

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This study investigated the performance of chitosan–aerogel–activated carbon (CHT:AEO:AC) biocomposite as an adsorbent for the removal of naproxen from wastewater. Naproxen removal in % was 99, 33, 62, and 90 using 300 mg of raw AC, raw CHT, CHT:AEO, and CHT:AEO:AC, respectively. Langmuir, Freundlich, Dubinin–Radushkevich (D–R), and Temkin isotherm models were used to obtain adsorption isotherms. Chi‐squared (χ2) and correlation coefficients (R2) values showed that the parameters of the Freundlich, Temkin, and D–R models were more suitable for naproxen adsorption than the Langmuir model for raw CHT, CHT:AEO, and CHT:AEO:AC, whereas the Langmuir model fitted well for raw AC. The adsorption of naproxen onto biocomposites was defined by pseudo‐second‐order kinetic model, and adsorption rate constants were 0.245, 0.036, 0.075, and 0.147 mg g−1 min−1 for raw AC, raw CHT, CHT:AEO, and CHT:AEO:AC, respectively. The impact of optimum process conditions on naproxen adsorption was explored using response surface methodology. The optimum independent variables were 288.94 mg, 29.64°C, and 372.5 min, leading to a rate of naproxen removal onto CHT:AEO:AC of 90.29%. Practitioner Points Naproxen adsorption from wastewater using chitosan–aerogel–activated carbon biocomposite (CHT:AEO:AC) was investigated. The effects of the amount of biocomposite, temperature, and time on the adsorption were investigated. Optimization of the process conditions was carried out using the response surface methodology.

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Section: Resultsmentioning

confidence: 99%

Removal of naproxen from wastewater using chitosan–aerogel–activated carbon biocomposites: Theory, equilibrium, kinetics, thermodynamics, and process optimization

Ozcan

Yalcin

Şimşek

et al. 2022

Water Environment Research

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“…[ 41 ] The degree of ionization of cefdinir is expected to increase with an increase in the pH of the solution. [ 28 ] The WL‐BC‐OH sample exhibited good performance in a wide pH range (2–11), and the cefdinir adsorption capacity of WL‐BC‐OH did not change significantly with the change in pH. This may indicate that a change in pH had a minimal effect on the surface chemistry charges of WL‐BC‐OH.…”

Section: Resultsmentioning

confidence: 99%

“…Recent reviews have reported that the pseudo‐second‐order kinetic model was the major fitted model for antibiotic adsorption on BC. [ 28,45,46 ] However, some studies also reported that the pseudo‐first‐order model fitted the experimental data. [ 47 ]…”

Section: Resultsmentioning

confidence: 99%

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Removal of Cefdinir from Water Using Waste Material‐Derived Activated Biochar as a Rapid, Effective, and Sustainable Adsorbent

Gümüş

Yumak

Gümüş

2021

CLEAN Soil Air Water

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Cefdinir adsorption onto non‐activated biochar (WL‐BC) and activated biochars (WL‐BC‐H, WL‐BC‐OH) prepared from waste biomass (WL) is comparatively investigated in view of adsorption factors, adsorption isotherms and adsorption kinetics. Batch experiments are conducted to assess the effects of pH, adsorption time and initial antibiotic concentration. Various advanced techniques are applied to characterize the prepared biochars (BCs). Characterization of the new BCs reveal that the activation process do not have a significant effect on the chemical structure of activated carbons, but it increases the surface area up to eight times. The equilibrium data are simulated with the Langmuir adsorption model indicating monolayer adsorption for both activated biochars WL‐BC and WL‐BC‐H. However, the adsorption isotherm for WL‐BC‐OH is represented well by the Freundlich model, which shows that multilayer adsorption took place. The kinetic data are analyzed using various kinetic models. The maximum adsorption capacity of the activated biochar is approximately tenfold in comparison to the non‐activated biochar. Additionally, the real wastewater experiments with treated campus wastewater show that the adsorptive performance of the activated biochar is not affected by other ions. Consequently, BCs derived from defatted laurel leaves could be effective and eco‐friendly adsorbents for removing cefdinir from wastewater.

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Sorption Potential of Different Forms of TiO2 for the Removal of Two Anticancer Drugs from Water

et al. 2022

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Anticancer drugs pose a potential risk to the environment due to their significant consumption and biological effect even at low concentrations. They can leach into soils and sediments, wastewater, and eventually into drinking water supplies. Many conventional technologies with more effective advanced oxidation processes such as photocatalysis are being extensively studied to find an economical and environmentally friendly solution for the removal of impurities from wastewater as the main source of these pharmaceuticals. Since it is impossible to treat water by photocatalysis if there is no sorption of a contaminant on the photocatalyst, this work investigated the amount of imatinib and crizotinib sorbed from an aqueous medium to different forms of photocatalyst. In addition, based on the sorption affinity studied, the applicability of sorption as a simpler and less costly process was tested in general as a potential route to remove imatinib and crizotinib from water. Their sorption possibility was investigated determining the maximum of sorption, influence of pH, ionic strength, temperature, and sorbent dosage in form of the suspension and immobilized on the fiberglass mesh with only TiO2 and in combination with TiO2/carbon nanotubes. The sorption isotherm data fitted well the linear, Freundlich, and Langmuir model for both pharmaceuticals. An increasing trend of sorption coefficients Kd was observed in the pH range of 5–9 with CRZ, showing higher sorption affinity to all TiO2 forms, which was supported by KF values higher than 116 (μg/g)(mL/μg)1/n. The results also show a positive correlation between Kd and temperature as well as sorbent dosage for both pharmaceuticals, while CRZ sorbed less at higher salt concentration. The kinetic data were best described with a pseudo-second-order model (R2 > 0.995).

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Removal of Cefdinir from Aqueous Solution Using Nanostructure Adsorbents of TiO2, SiO2 and TiO2/SiO2

Cited by 4 publications

References 33 publications

Removal of naproxen from wastewater using chitosan–aerogel–activated carbon biocomposites: Theory, equilibrium, kinetics, thermodynamics, and process optimization

Removal of naproxen from wastewater using chitosan–aerogel–activated carbon biocomposites: Theory, equilibrium, kinetics, thermodynamics, and process optimization

Removal of Cefdinir from Water Using Waste Material‐Derived Activated Biochar as a Rapid, Effective, and Sustainable Adsorbent

Sorption Potential of Different Forms of TiO2 for the Removal of Two Anticancer Drugs from Water

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