Optimal degradation of Ciprofloxacin in a heterogeneous Fenton-like process using (<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline" id="d1e1226" altimg="si14.svg"><mml:mi>δ</mml:mi></mml:math>-FeOOH)/MWCNTs nanocomposite

Salari, Marjan; Rakhshandehroo, Gholamreza; Nikoo, Mohammad Reza; Zerafat, Mohammad Mahdi; Mooselu, Mehrdad Ghorbani

doi:10.1016/j.eti.2021.101625

“…Experimental design is a method for conducting a systematic set of experiments to obtain reliable and appropriate results based on a limited number of observations [42][43][44]. Optimization techniques may be used to identify the optimal values for variables and investigate the effect of optimized parameters on the response.…”

Section: Methodsmentioning

confidence: 99%

Optimization by Box–Behnken Design and Synthesis of Magnetite Nanoparticles for Removal of the Antibiotic from an Aqueous Phase

Salari

¹

2022

Adsorption Science & Technology

Self Cite

10

0

View full text Add to dashboard Cite

Some environmental problems caused by the intrusion of active drug ingredients, especially antibiotics, into water resources pose a serious threat. Ciprofloxacin (CIP) is an antibiotic from the group of fluoroquinolones that is used extensively in the treatment of bacterial infections. The presence of drug residues in the environment, especially in water resources, is an essential issue due to their stability and nondegradability. This study is aimed at investigating the efficiency of magnetite (Fe3O4) nanoparticles and the effect of independent variables, including initial concentrations of CIP (35-80 mg/L), adsorbent doses (20–60 mg), and pH values (4–10) at reaction time (80 min) for the removal efficiency of CIP antibiotics based on the Box-Behnken design (BBD) method. The analysis of variance (ANOVA) results indicated that a quadratic model was convenient for modeling CIP removal. The first step, the coprecipitation method, was appropriate for the preparation of Fe3O4 nanoparticles and developed as highly efficient adsorbents. Synthesized nanoparticles were later characterized by X-ray diffraction (XRD), Scanning Electron Microscopy (SEM), and Fourier transform infrared spectra (FT-IR). The results of XRD have shown that angles for the peaks at 2 θ = 30 , 35.22 , 43.35 , 53.68 , 57 , 62.79 , and 71.38 deg , which corresponded to the crystal planes 220, 311, 400, 422, 511, 440, and 535, respectively, were consistent with standard peaks of magnetite and a cubic face structure. The obtained results indicated that the CIP removal efficiency was 74.44% under optimum operation parameters: initial concentration of CIP 44.15 (mg/L), adsorbent dosage of 59.6 (mg), pH ≅ 5 , and contact time of 80 min. In fact, a cooperative agreement between model prediction and experimental data using BBD with significant R 2 values of 0.95 was observed. Based on the results, magnetite nanoparticles have an excellent ability to remove antibiotics from an aqueous phase.

show abstract

“…Among various RSM approaches, Central Composite Design (CCD) as the most promising method is able to predict the optimized situation with introducing quadratic model (Karimifard and Moghaddam 2018, Rakhshaee and Darvazeh 2017, Tolba et al 2019. Therefore, RSM based on CCD is designed by fitting an empirical model to the experimental data (Khataee et al 2012, Salari et al 2021, Zubir et al 2015.…”

Section: Design Of Experiments and Optimizationmentioning

confidence: 99%

“…Where, Y is the response, Xi and Xj are independent variables, β0 is an intercept, βi is the linear coefficient, βii shows the quadratic coefficient, and βij indicates the interaction coefficient, and 𝜀 is the residual term (Khataee et al 2012, Salari et al 2021.…”

Section: Design Of Experiments and Optimizationmentioning

confidence: 99%

See 1 more Smart Citation

Utilizing the highly efficient bimetallic-organic framework (Fe, Cu)/carbon nanotubes composite for the heterogeneous Fenton-like process

Parsa,

Tahmasebi,

Jafari

2023

Preprint

0

View full text Add to dashboard Cite

Bimetallic-organic framework (Fe, Cu)/carbon nanotubes as a novel heterogeneous catalyst prepared through a simple and efficient solvothermal method has been utilized in Fenton-like process for the degradation of acid orange 7 (AO7). The response surface methodology (RSM) based on the five-level central composite design (CCD) has been employed for investigation the interaction between four effective variables including pH, H2O2 concentration, catalyst dose and reaction time. The results of optimization revealed that maximum AO7 degradation efficiency (92.76%) was attained at the optimum conditions of pH=3.8, H2O2 concentration = 25 mM, reaction time=23 min and catalyst dose=237.5 mg L-1. Interestingly, it was found that in addition to the role of Fe and Cu species on the surface of Fe0.67Cu0.33(BDC)@CNT, the surface oxygen-functional groups on the CNT leads to faster Fe(III)/Fe(II) cycling and efficient performance over a wider pH range. Furthermore, five sequential cycles confirmed the reusability of Fe0.67Cu0.33(BDC)@CNT catalyst. The concluding remarks of this study provide beneficial results for developing and utilizing advanced MOF-based catalysts for efficient environmental remediation.

show abstract

“…An intermediate product of magnetite synthesis and oxidation is iron oxyhydroxide. Its stable form, feroxyhyte δ-FeOOH, has reportedly been used in various heterogeneous catalysis systems to remove pharmaceuticals and other refractory impurities from aqueous solutions (Salari et al 2021;Wang et al 2017). Ferrihydrite can also adsorb large amounts of metals, e.g., Pb (II), Se (VI) (Zhang et al 2021;Smržova et al 2023).…”

Section: Introductionmentioning

confidence: 99%

Effects of water-induced aging on iron (oxyhydr)oxides nanoparticles: linking crystal structure, iron ion release, and toxicity

Dzeranov,

Bondarenko,

Saman

et al. 2024

Chem. Pap.

1

0

View full text Add to dashboard Cite

The effects of aging of colloidal dispersions of iron (Fe) oxy(hydr)oxides have practical implications for a variety of fields, including medicine, biology, chemistry, and environmental science. Aging affects the stability of these materials under different environmental conditions, thereby affecting their reactivity and applicability in remediation. However, only a limited number of studies have focused on aging-induced changes in the phase composition, surface properties, and toxicological effects of nanoparticles (NPs). In this study, a variety of Fe oxides were synthesized, including the closely related Fe oxides magnetite and maghemite, intermediate phases (Fe3-δO4: Fe3O4, γ-Fe2O3, 5Fe2O3•9H2O), and δ-FeOOH. Fe3O4 was synthesized by precipitation, γ-Fe2O3 by direct oxidation of Fe3O4, while 5Fe2O3•9H2O and δ-FeOOH were prepared by precipitation with slow and fast oxidation, respectively. The crystal structure, surface charge, and leaching of Fe ions of these materials were measured. All synthesized materials were then tested in bioassays with ciliates and higher plants at circumneutral pH, both upon preparation and after aqueous aging. Quantitative analysis of the XRD data using the Rietveld method showed that the crystal structure of the magnetite nanoparticles changed to γ-Fe2O3. The evaluation of biological activity in Sinapis alba (white mustard) showed that NPs of different compositions, stored at a maximum concentration of 10 g L -1 , inhibited root growth by 50%. In the case of δ-FeOOH and Fe3O4, however, concentrations of 1 g L -1 caused only minor inhibition. The toxic effects of Fe-NPs, attributed to the release of Fe 2+ and Fe 3+ ions by oxidation, were found to be consistent with the redox behavior of NPs. The study of the properties of magnetic nanoparticles, both in their initial state and after aqueous aging, enhances our understanding of their performance in magnetic nanofluids.Electronic Supplementary Information (ESI) available: [details of any supplementary information available should be included here]. See

show abstract

Optimal degradation of Ciprofloxacin in a heterogeneous Fenton-like process using (δ-FeOOH)/MWCNTs nanocomposite

Cited by 20 publications

References 60 publications

Optimization by Box–Behnken Design and Synthesis of Magnetite Nanoparticles for Removal of the Antibiotic from an Aqueous Phase

Optimization by Box–Behnken Design and Synthesis of Magnetite Nanoparticles for Removal of the Antibiotic from an Aqueous Phase

Utilizing the highly efficient bimetallic-organic framework (Fe, Cu)/carbon nanotubes composite for the heterogeneous Fenton-like process

Effects of water-induced aging on iron (oxyhydr)oxides nanoparticles: linking crystal structure, iron ion release, and toxicity

Contact Info

Product

Resources

About