Surface interactions of oxytetracycline on municipal solid waste-derived biochar–montmorillonite composite

Weerasooriyagedara, Madara; Ahamed, Ashiq; Gunatilake, Sameera R.; Giannakoudakis, Dimitrios A.; Vithanage, Meththika

doi:10.1080/27658511.2022.2046324

Cited by 9 publications

(6 citation statements)

References 47 publications

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“…The decrease in the current (Δ I ) of AC in the presence of OTC was compared to that without OTC. The Δ I of AC on DES-F-AC/SPE was higher than that on F-AC/SPE owing to the adsorption of OTC on the surface of F-AC through electrostatic interactions, hydrogen bonding, and π–π interactions, as shown in Figure …”

Section: Resultsmentioning

confidence: 99%

“…In this study, the electrochemical behavior of OTC adsorbed on modified electrodes was studied using CV and DPV. The peak current of F-AC decreased significantly owing to the adsorption of OTC on the surface of the electrode through electrostatic interactions, hydrogen bonding, and π–π electron donor–acceptor interactions . Therefore, the results were investigated based on the change in the current (Δ I ) of F-AC with and without OTC.…”

Section: Resultsmentioning

confidence: 99%

“…The Δ I of AC on DES-F-AC/SPE was higher than that on F-AC/SPE owing to the adsorption of OTC on the surface of F-AC through electrostatic interactions, hydrogen bonding, and π–π interactions, as shown in Figure 5 . 52 …”

Section: Resultsmentioning

confidence: 99%

“…The peak current of F-AC decreased significantly owing to the adsorption of OTC on the surface of the electrode through electrostatic interactions, hydrogen bonding, and π–π electron donor–acceptor interactions. 52 Therefore, the results were investigated based on the change in the current (Δ I ) of F-AC with and without OTC. Although OTC affected the oxidation peaks of F-AC, only the oxidation peak (anodic current) of F-AC was considered.…”

Section: Resultsmentioning

confidence: 99%

“…The ΔI of AC on DES-F-AC/SPE was higher than that on F-AC/ SPE owing to the adsorption of OTC on the surface of F-AC through electrostatic interactions, hydrogen bonding, and π−π interactions, as shown in Figure 5. 52 The adsorption mechanism of OTC on the electrode surface was investigated based on the effect of the scan rate (ν) on the peak current and potential at the F-AC/SPE. The CV curves of F-AC/SPE were obtained at different scan rates over the range 10−100 mV s −1 in the presence of 200 μg L −1 OTC (Figure S1A).…”

Section: Electrochemicalmentioning

confidence: 99%

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Novel and Highly Sensitive Electrochemical Sensor for the Determination of Oxytetracycline Based on Fluorine-Doped Activated Carbon and Hydrophobic Deep Eutectic Solvents

et al. 2022

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Residues of oxytetracycline (OTC), a veterinary antibiotic and growth promoter, can be present in animal-derived foods; their consumption is harmful to human health and their presence must therefore be detected and regulated. However, the maximum residue limit is low, and consequently highly sensitive and accurate detectors are required to detect the residues. In this study, a novel highly sensitive electrochemical sensor for the detection of OTC was developed using a screen-printed electrode modified with fluorine-doped activated carbon (F-AC/SPE) combined with a novel deep eutectic solvent (DES). The modification of activated carbon by doping with fluorine atoms (F-AC) enhanced the adsorption and electrical activity of the activated carbon. The novel hydrophobic DES was prepared from tetrabutylammonium bromide (TBABr) and a fatty acid (malonic acid) using a green synthesis method. The addition of the DES increased the electrochemical response of F-AC for OTC detection; furthermore, it induced preconcentration of OTC, which increased its detectability. The electrostatic interactions between DES and OTC as well as the adsorption of OTC on the surface of the modified electrode through H-bonding and π–π interactions helped in OTC detection, which was quantified based on the decrease in the anodic peak potential (E pa = 0.3 V) of AC. The electrochemical behavior of the modified electrode was investigated by cyclic voltammetry, differential pulse voltammetry, and electrochemical impedance spectroscopy. Under optimum conditions, the calibration plot of OTC exhibited a linear response in the range 5–1500 μg L–1, with a detection limit of 1.74 μg L–1. The fabricated electrochemical sensor was successfully applied to determine the OTC in shrimp pond and shrimp samples with recoveries of 83.8–100.5% and 93.3–104.5%, respectively. In addition to the high sensitivity of OTC detection, the proposed electrochemical sensor is simple, cost-effective, and environmentally friendly.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Electrochemicalmentioning

confidence: 99%

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Novel and Highly Sensitive Electrochemical Sensor for the Determination of Oxytetracycline Based on Fluorine-Doped Activated Carbon and Hydrophobic Deep Eutectic Solvents

et al. 2022

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Efficient removal of emerging pollutant oxytetracycline by cost‐effective biochar–hydroxyapatite composite

Tran,

Le,

Nguyen

et al. 2024

Asia-Pacific J Chem Eng

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Biochar (BC) and hydroxyapatite (HAp) are widely used in environmental remediation due to their high adsorption capacity, porous structure, large specific surface area, chemical stability, non‐toxicity, and low solubility. Combining BC and HAp is a green and effective strategy for creating new adsorbents (BCH) that have a synergistic impact on wastewater treatment. In this study, BCH composites derived from apatite ore and macadamia nut shells were synthesized by the wet impregnation method to remove oxytetracycline (OTC) from aqueous solutions. The BC‐HAp composite with a ratio of 10:1 (by weight) was the most effective material for removing OTC. The Redlich–Peterson model achieved the highest correlation coefficient among the four models tested (Freundlich, Langmuir, Temkin, and Redlich–Peterson). The maximum adsorption capacity calculated with the Langmuir isotherm was 49.59 mg g−1. It was found that the adsorption process was significantly affected by the solution pH. The bipolar form of the drug was found to be OTC±, and the adsorption was most effective in solutions with a pH of 6. The OTC adsorption dominant mechanisms on nanocomposites could be electrostatic attraction, hydrogen bonding formation, surface complexation, or ion exchange. Therefore, the BCH composite showed great potential for removing OTC pollutants in a cost‐effective, and environmentally friendly manner.

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Clay-Supported Nanoscale Zero-Valent Iron Composites for Water Purification

Alahakoon¹,

Arachchi²,

Gunatilake³

2023

Advances in Material Research and Technology

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Surface interactions of oxytetracycline on municipal solid waste-derived biochar–montmorillonite composite

Cited by 9 publications

References 47 publications

Novel and Highly Sensitive Electrochemical Sensor for the Determination of Oxytetracycline Based on Fluorine-Doped Activated Carbon and Hydrophobic Deep Eutectic Solvents

Novel and Highly Sensitive Electrochemical Sensor for the Determination of Oxytetracycline Based on Fluorine-Doped Activated Carbon and Hydrophobic Deep Eutectic Solvents

Efficient removal of emerging pollutant oxytetracycline by cost‐effective biochar–hydroxyapatite composite

Clay-Supported Nanoscale Zero-Valent Iron Composites for Water Purification

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