A mechanistic study of ciprofloxacin adsorption by goethite in the presence of silver and titanium dioxide nanoparticles

Tang, Jie; Wang, Yun; Xue, Qi‐Kun; Liu, Fei; Carroll, Kenneth C.; Lü, Xiaohua; Zhou, Taogeng; Wang, Dengjun

doi:10.1016/j.jes.2021.08.052

Cited by 6 publications

(2 citation statements)

References 47 publications

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“…The highest affinity for CFx in the acidic condition may be due to the negatively charged surface of the material through the COOH acid groups. At lower pH values (pH < 6), the availability of large number of protons with an affinity for the hydroxyl anion are driven to the formation of hydroxyl radicals, which have high oxidizing activity (Tang et al, 2022).…”

Section: Analysis Of Response Variables (3-d Response Surface Plot)mentioning

confidence: 99%

Synergistic Adsorption/Photodegradation of Ciprofloxacin by UV light-driven Nanocomposite Photocatalyst of Cu doped AC/TiO2: Experimental design via RSM-CCD.

Yaacob

Khasri

Ridzuan

et al. 2023

Preprint

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Improving the adsorption ability of titanium dioxide (TiO2) has been considered as a promising strategy to promote its photodegradation of pollutant for the wastewater treatment. Hence, the statistical optimization by using central composite design-response surface methodology for the synthesizing of Cu doped AC/TiO2 nanocomposite photocatalyst via microwave-assisted sol-gel method was prepared, and then applied in adsorption/photodegradation for Ciprofloxacin (CFx) removal. From analysis of variance analysis, the findings show 95 % removal of CFx within 120 min in a batch system at the optimum preparation parameters of AC/TiO2 ratio = 0.50, Cu dosage = 0.32 g, irradiation power = 477 W, and irradiation time = 14 min. Kinetic studies displayed that the kinetic data was well described by Pseudo second-order models. Also, the isotherms data was well fitted by Langmuir model, with maximum adsorption capacity of 200 . Radical quenching test indicated that hydroxyl radical (•OH) was found to be the reactive radical that generally play the primary role in adsorption/photodegradation of CFx removal. The synergetic mechanisms of adsorption/photodegradation of CFx removal by Cu doped AC/TiO2 nanocomposite photocatalyst was mainly done by photogenerated electron-hole pair and hydroxyl radicals. The results of this study indicated that the prepared Cu doped AC/TiO2 nanocomposite photocatalyst is a high potential of sustainable photocatalyst for CFx removal in aqueous solution using adsorption/photodegradation under UV light irradiation.

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Section: Analysis Of Response Variables (3-d Response Surface Plot)mentioning

confidence: 99%

Synergistic Adsorption/Photodegradation of Ciprofloxacin by UV light-driven Nanocomposite Photocatalyst of Cu doped AC/TiO2: Experimental design via RSM-CCD.

Yaacob

Khasri

Ridzuan

et al. 2023

Preprint

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“…20,21 A previous research has examined the adsorption of organic molecules (e.g., ciprofloxacin, CIP) by coexisting TiO 2 NPs, in which they observed that the coexistence of TiO 2 NPs inhibited the adsorption of CIP by goethite through the competitive adsorption relationship between TiO 2 NPs and goethite. 22 However, limited studies are available on how nano oxides may affect the adsorption and molecular fractionation of DOM on iron (hydroxyl)oxides. 23 Furthermore, various nano oxides, particularly SiO 2 NPs, are the most widely distributed in soil and water environments, mainly deriving from natural minerals (e.g., kaoline, montmorillonite, and quartz) 15 and industrial production and applications.…”

Section: Introductionmentioning

confidence: 99%

Regulation of SiO₂ Nanoparticles on the Adsorptive Fractionation of Dissolved Organic Matter by Goethite

Chen,

Wang,

et al. 2023

Environ. Sci. Technol.

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SiO 2 nanoparticles (SiO 2 NPs) are most widely available and coexisting with DOM at the mineral-water interface; however, the role of SiO 2 NPs in DOM fractionation and the underlying mechanisms have not been fully understood. Using Fourier transform ion cyclotron resonance mass spectrometry, combined with Fourier transform infrared spectroscopy and X-ray adsorption fine structure spectroscopy, was employed to investigate the adsorptive fractionation of litter layer-derived DOM on goethite coexisting with SiO 2 NPs under different pH conditions. Results indicated that the inhibitory effect of the coexisting SiO 2 NPs on OM sorbed by goethite was waning as environmental pH increased due to the reduced steric interactions and the concurrent elevated hydrogen bonding/hydrophobic partitioning interactions on the goethite surface. We observed the coexisting SiO 2 NPs inhibited the adsorption of high carboxylic-containing condensed aromatic/aromatics compounds on goethite under different pH conditions while improving the adsorption of highly unsaturated aliphatic/phenolic and carbohydratelike compounds in an alkaline and/or circumneutral environment. More nitrogen-containing structures may favor the adsorption of phenolic and nonaromatic compounds to goethite by counteracting the negative effect of SiO 2 NPs. These findings suggest that DOM sequestration may be significantly regulated by the coexisting SiO 2 NPs at the mineral-water interface, which may further influence the carbon−nitrogen cycling and contaminant fate in natural environments.

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Adsorption behavior of graphite‐like walnut shell biochar modified with ammonia for ciprofloxacin in aqueous solution

Wang,

Zhang,

et al. 2024

J of Chemical Tech & Biotech

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BACKGROUNDGraphite‐like biochar of NWSC600K was prepared at 900 °C using walnut shell as the raw material and aqueous ammonia (NH3·H2O) as an activator, and characterized using transmission and scanning eletron microscopy (TEM, SEM), X‐ray diffraction (XRD), Brunauer–Emmett–Teller (BET), Raman spectroscopy and Fourier transform infrared (FTIR). The study investigated the adsorption performance and mechanism of NWSC600K for ciprofloxacin (CIP).RESULTSThe results showed that extremely tiny pores were found on the surface of NWSC600K, which increased its specific surface area to 823.91 m2 g−1, whereas the average pore size of NWSC600K decreased to 3.23 nm. The results of TEM, XRD and Raman spectroscopy detected well‐arranged lattice stripes as well as characteristic peaks corresponding to the graphite lattice appearing on the surface of NWSC600K. Moreover, the ID/IG value for NWSC600K was 1.429. The FTIR results showed that functional groups including the amino group were formed on NWSC600K.CONCLUSIONThe adsorption capacity of NWSC600K for CIP was 158.14 mg g−1 and the corresponding removal rate was 97.5% at pH 7. The pH value impact on the removal efficiency of CIP greatly, and the removal rate of CIP decreased linearly with increasing pH. The coexisting ions also would inhibit the adsorption of CIP on NWSC600K. Results obtained from kinetic and isotherm models, thermodynamics and characterization analyses suggested that pore‐filling, π–π stacking, hydrogen bonding, hydrophobicity and electrostatic interaction existed during the adsorption process. The adsorption was a nonspontaneous exothermic reaction. © 2024 Society of Chemical Industry (SCI).

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A mechanistic study of ciprofloxacin adsorption by goethite in the presence of silver and titanium dioxide nanoparticles

Cited by 6 publications

References 47 publications

Synergistic Adsorption/Photodegradation of Ciprofloxacin by UV light-driven Nanocomposite Photocatalyst of Cu doped AC/TiO2: Experimental design via RSM-CCD.

Synergistic Adsorption/Photodegradation of Ciprofloxacin by UV light-driven Nanocomposite Photocatalyst of Cu doped AC/TiO2: Experimental design via RSM-CCD.

Regulation of SiO₂ Nanoparticles on the Adsorptive Fractionation of Dissolved Organic Matter by Goethite

Adsorption behavior of graphite‐like walnut shell biochar modified with ammonia for ciprofloxacin in aqueous solution

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A mechanistic study of ciprofloxacin adsorption by goethite in the presence of silver and titanium dioxide nanoparticles

Cited by 6 publications

References 47 publications

Synergistic Adsorption/Photodegradation of Ciprofloxacin by UV light-driven Nanocomposite Photocatalyst of Cu doped AC/TiO2: Experimental design via RSM-CCD.

Synergistic Adsorption/Photodegradation of Ciprofloxacin by UV light-driven Nanocomposite Photocatalyst of Cu doped AC/TiO2: Experimental design via RSM-CCD.

Regulation of SiO2 Nanoparticles on the Adsorptive Fractionation of Dissolved Organic Matter by Goethite

Adsorption behavior of graphite‐like walnut shell biochar modified with ammonia for ciprofloxacin in aqueous solution

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Regulation of SiO₂ Nanoparticles on the Adsorptive Fractionation of Dissolved Organic Matter by Goethite