A review of the antibiotic ofloxacin: Current status of ecotoxicology and scientific advances in its removal from aqueous systems by adsorption technology

Georgin, Jordana; Franco, Dison Stracke Pfingsten; Ramos, Claudete Gindri; Allasia, Daniel; Lima, Éder C.; Sher, Farooq

doi:10.1016/j.cherd.2023.03.025

Cited by 43 publications

(6 citation statements)

References 168 publications

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“…Generally speaking, because ofloxacin has two p K a values (Table ), its aqueous solution exists in three ionic states. When pH < 5.98, ofloxacin is mainly in the form of cations (OFL + ); when pH > 8.00, it is mainly in the form of anions (OFL – ); when it is 5.98, it mainly exists in the form of zwitterion. , The zeta potential of 70% BD-CaAl-LDH600 at different pH values is shown in Figure b. At pH < 5, electrostatic repulsion occurs between the positively charged surface of the composite and OFL + in solution, and at pH > 5, electrostatic repulsion also occurs between the negatively charged surface of the composite and the OFL – in solution. , In summary, electrostatic attraction is not the main adsorption mechanism of 70% BD-CaAl-LDH600 on ofloxacin, and the pH value of the solution is not a key factor affecting the adsorption performance of 70% BD-CaAl-LDH600 against ofloxacin …”

Section: Resultsmentioning

confidence: 99%

“…When pH < 5.98, ofloxacin is mainly in the form of cations (OFL + ); when pH > 8.00, it is mainly in the form of anions (OFL – ); when it is 5.98, it mainly exists in the form of zwitterion. 36 , 37 The zeta potential of 70% BD-CaAl-LDH600 at different pH values is shown in Figure 6 b. At pH < 5, electrostatic repulsion occurs between the positively charged surface of the composite and OFL + in solution, and at pH > 5, electrostatic repulsion also occurs between the negatively charged surface of the composite and the OFL – in solution.…”

Section: Resultsmentioning

confidence: 99%

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Calcined Bean Dregs-Hydrocalumite Composites as Efficient Adsorbents for the Removal of Ofloxacin

Zhang,

Zhou,

Luo

2023

ACS Omega

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Calcined bean dregs-hydrocalumite composites were prepared through in situ self-assembly of hydrocalumite on the surface of bean dregs and used for the adsorption of ofloxacin from water. The adsorbents were characterized by scanning electron microscopy, X-ray powder diffraction, and N 2 physical adsorption. The results showed that the adsorption performance of calcined bean dregs-hydrocalumite composites for ofloxacin was much better than that of a single bean dreg carbon or calcined hydrocalumite. The effects of preparation and adsorption conditions on the adsorption property of calcined bean dregs-hydrocalumite for ofloxacin were also investigated. The adsorption ratio of ofloxacin reached up to 99.93% using 4 g·L –1 adsorbent dosage with 20 mg·L –1 initial concentration of ofloxacin at 30 °C in 2 h. The adsorption process mainly occurred in the first 5 min. In addition, the adsorption of ofloxacin by calcined bean dregs-hydrocalumite was more in line with pseudo-second-order dynamics and the Langmuir isotherm model.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Calcined Bean Dregs-Hydrocalumite Composites as Efficient Adsorbents for the Removal of Ofloxacin

Zhang,

Zhou,

Luo

2023

ACS Omega

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“…The cation exchange between OFL and oxygen functional groups may be involved in OFL sorption (Equation ( 7)) and it could decrease with pyrolysis owing to the decreased acidic functional group. It was suggested that the cation exchange of cationic OFL was much greater than that of amphoteric OFL [45,49,50]. Thus, the contribution of cation exchange to the differential sorption behaviors of OFL on the investigated sorbents could be minimal because OFL + only accounted for 3.83-6.21% of overall OFL concentrations in the sorption systems.…”

Section: (Ii) Cation Exchangementioning

confidence: 98%

Insights into the Roles of Surface Functional Groups and Micropores in the Sorption of Ofloxacin on Banana Pseudo-Stem Biochars

Wang,

Yang,

Wang

et al. 2024

Sustainability

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In the present study, banana pseudo-stem (BS) was pyrolyzed under anaerobic conditions without any physical or chemical modification. Their properties, as well as their sorption affinity to ofloxacin (OFL), were studied. As a result, oxalates and KCl formed at a relatively low temperature of 300 °C, while bicarbonates generally formed at a pyrolysis temperature above 400 °C. Surface functional groups of BS biochars facilitated OFL sorption mainly via specific interactions including electronic attraction (EA), π–π electron donor–acceptor (π–π EDA) interaction, the ordinary hydrogen bond (OHB), and the negative charge-assisted hydrogen bond ((−)CAHB). Except for (−)CAHB, these interactions all decreased with an elevated pH, resulting in overall decreased OFL sorption. Significant OFL sorption by BS biochars produced at 300 °C, observed even at an alkaline condition was attributed to (−)CAHB. Micropores formed in BS biochar prepared at 500 °C, with a specific surface area as high as 390 m2 g−1 after water washing treatment. However, most micropores could not be accessed by OFL molecules due to the size exclusion effect. Additionally, the inherent K-containing salts may hinder OFL sorption by covering the sorption sites or blocking the inner pores of biochars, as well as releasing OH− into the solution. Thus, BS biochar produced at 300 °C is an excellent sorbent for OFL removal due to its high sorption ability and low energy. Our findings indicate that biochar techniques have potential win–win effects in recycling banana waste with low energy and costs, and simultaneously converting them into promising sorbents for the removal of environmental contaminants.

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“…Numerous methods have been investigated as a result of this issue, mostly for the removal and degradation of this chemical [ 1 , 16 , 17 , 18 , 19 ], for example, photolysis, photo-Fenton, photocatalysis, ozonation, nanofiltration, and adsorption [ 18 , 19 , 20 ]. Adsorption is a popular method for eliminating contaminants from water and wastewater due to its effectiveness and low cost [ 21 , 22 , 23 , 24 ]. Adsorption has the advantage of being able to use new adsorbents produced from plant leftovers [ 25 , 26 ].…”

Section: Introductionmentioning

confidence: 99%

The Synthesis and Evaluation of Porous Carbon Material from Corozo Fruit (Bactris guineensis) for Efficient Propranolol Hydrochloride Adsorption

Franco,

Georgin,

Ramos

et al. 2023

Molecules

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This study explores the potential of the corozo fruit (Bactris guineensis) palm tree in the Colombian Caribbean as a source for porous carbon material. Its specific surface area, pore volume, and average pore size were obtained using N2 adsorption/desorption isotherms. The images of the precursor and adsorbent surface were obtained using scanning electron microscopy (SEM). Fourier transform infrared (FTIR) spectra were obtained to detect the main functional groups present and an X-ray diffraction analysis (XRD) was performed in order to analyze the structural organization of the materials. By carbonizing the fruit stone with zinc chloride, a porous carbon material was achieved with a substantial specific surface area (1125 m2 g⁻1) and pore volume (3.241 × 10−1 cm3 g⁻1). The material was tested for its adsorption capabilities of the drug propranolol. The optimal adsorption occurred under basic conditions and at a dosage of 0.7 g L⁻1. The Langmuir homogeneous surface model effectively described the equilibrium data and, as the temperature increased, the adsorption capacity improved, reaching a maximum of 134.7 mg g⁻1 at 328.15 K. The model constant was favorable to the temperature increase, increasing from 1.556 × 10−1 to 2.299 × 10−1 L mg−1. Thermodynamically, the adsorption of propranolol was found to be spontaneous and benefited from higher temperatures, indicating an endothermic nature (12.39 kJ mol⁻1). The negative ΔG0 values decreased from −26.28 to −29.99 kJ mol−1, with the more negative value occurring at 328 K. The adsorbent material exhibited rapid kinetics, with equilibrium times ranging from 30 to 120 min, depending on the initial concentration. The kinetics data were well-represented by the general order and linear driving force models. The rate constant of the general order model diminished from 1.124 × 10−3 to 9.458 × 10−14 with an increasing concentration. In summary, the leftover stone from the Bactris guineensis plant can be utilized to develop activated carbon, particularly when activated using zinc chloride. This material shows promise for efficiently adsorbing propranolol and potentially other emerging pollutants.

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A review of the antibiotic ofloxacin: Current status of ecotoxicology and scientific advances in its removal from aqueous systems by adsorption technology

Cited by 43 publications

References 168 publications

Calcined Bean Dregs-Hydrocalumite Composites as Efficient Adsorbents for the Removal of Ofloxacin

Calcined Bean Dregs-Hydrocalumite Composites as Efficient Adsorbents for the Removal of Ofloxacin

Insights into the Roles of Surface Functional Groups and Micropores in the Sorption of Ofloxacin on Banana Pseudo-Stem Biochars

The Synthesis and Evaluation of Porous Carbon Material from Corozo Fruit (Bactris guineensis) for Efficient Propranolol Hydrochloride Adsorption

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