Catalytic ozonation mechanisms of Norfloxacin using Cu–CuFe2O4

Zhang, Lanhe; Li, Yiran; Guo, Jingbo; Kan, Zhongfeng; Jia, Yongxing

doi:10.1016/j.envres.2022.114521

Cited by 43 publications

(11 citation statements)

References 59 publications

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“…The pure PVA exhibited the three typical diffraction peaks at 2θ = 19.5°, 22.9°, and 40.8°, corresponding to the (101), (200), and (102) planes of PVA crystallites, while CS presented a broad peak at 2θ around 21° because of its amorphous structure [ 35 ]. The XRD pattern of CE exhibits two distinct diffraction peaks, at 2θ = 16.4° and 22.8° due to the reflection from the different crystal planes of CE, such as (010) and (002) [ 35 , 36 ]. The PVA-CS and PV-CS/CE hydrogels show diffraction peaks at 2θ values of 25° to 40°, which may relate to greater crystallinity of hydrogels due to strong hydrogen bonding between the donor-acceptor groups (–NH 2 and –OH) of CS and/or PVA or CE [ 34 ].…”

Section: Resultsmentioning

confidence: 99%

“…Moreover, all peaks of CE disappeared in PVA-CS/CE composite hydrogel because the content of CE was too low. From this evidence, the authors concluded that intermolecular interactions between PVA and CS are formed, which decreases the crystallinity of the PVA-CS/CE composite hydrogel [ 36 ].…”

Section: Resultsmentioning

confidence: 99%

“…It is worth mentioning that the rapid removal of metallic ions on the adsorbent surface at the initial stage of the process can be attributed to the availability of more active adsorption sites at the beginning of adsorption, which permits the rapid accumulation of metallic ions on the adsorption sites. As this process continues, the active sites are filled, the accessibility of metal ions to the active sites becomes low due to the saturation of active sites, and eventually, adsorption approaches an equilibrium at a certain time [ 24 , 36 ].…”

Section: Resultsmentioning

confidence: 99%

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Synthesis and Characterization of Biodegradable Poly(vinyl alcohol)-Chitosan/Cellulose Hydrogel Beads for Efficient Removal of Pb(II), Cd(II), Zn(II), and Co(II) from Water

Aljar

Rashdan

Almutawah

et al. 2023

Gels

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Globally, water contamination by heavy metals is a serious problem that affects the environment and human health. Adsorption is the most efficient way of water treatment for eliminating heavy metals. Various hydrogels have been prepared and used as adsorbents to remove heavy metals. By taking advantage of poly(vinyl alcohol) (PVA), chitosan (CS), cellulose (CE), and the process for physical crosslinking, we propose a simple method to prepare a PVA-CS/CE composite hydrogel adsorbent for the removal of Pb(II), Cd(II), Zn(II) and Co(II) from water. Structural analyses of the adsorbent were examined by Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy-energy dispersive X-ray (SEM-EDX) analysis, and X-ray diffraction (XRD). PVA-CS/CE hydrogel beads had a good spherical shape together with a robust structure and suitable functional groups for the adsorption of heavy metals. The effects of adsorption parameters such as pH, contact time, adsorbent dose, initial concentration of metal ions, and temperature on the adsorption capacity of PVA-CS/CE adsorbent were studied. The adsorption characteristics of PVA-CS/CE for heavy metals may be completely explained by pseudo-second-order adsorption and the Langmuir adsorption model. The removal efficiency of PVA-CS/CE adsorbent for Pb(II), Cd(II), Zn(II), and Co(II) was 99, 95, 92, and 84%, respectively, within 60 min. The heavy metal’s hydrated ionic radius may be crucial in determining the adsorption preference. After five consecutive adsorption–desorption cycles, the removal efficiency remained over 80%. As a result, the outstanding adsorption-desorption properties of PVA-CS/CE can potentially be extended to industrial wastewater for heavy metal ion removal.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Synthesis and Characterization of Biodegradable Poly(vinyl alcohol)-Chitosan/Cellulose Hydrogel Beads for Efficient Removal of Pb(II), Cd(II), Zn(II), and Co(II) from Water

Aljar

Rashdan

Almutawah

et al. 2023

Gels

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“…In recent decades, nanomaterials are used in solar cells 22 , catalytic reactions 23 , heat exchangers 24 , wastewater treatment 25 , energy application 26 , and system sensing 27 . A diversity of mainly nanosized metal oxides, including tungsten oxide 28 , zinc oxide 29 , cobalt oxide 30 , iron oxide 31 , copper oxide 32 , bismuth oxide 33 , samarium oxide 34 , and indium oxide 35 have already been used to fabricate acetone-detecting sensors.…”

mentioning

confidence: 99%

Wavelet-artificial neural network to predict the acetone sensing by indium oxide/iron oxide nanocomposites

Iranmanesh

Pourahmad

Shabestani

et al. 2023

Sci Rep

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This study applies a hybridized wavelet transform-artificial neural network (WT-ANN) model to simulate the acetone detecting ability of the Indium oxide/Iron oxide (In2O3/Fe2O3) nanocomposite sensors. The WT-ANN has been constructed to extract the sensor resistance ratio (SRR) in the air with respect to the acetone from the nanocomposite chemistry, operating temperature, and acetone concentration. The performed sensitivity analyses demonstrate that a single hidden layer WT-ANN with nine nodes is the highest accurate model for automating the acetone-detecting ability of the In2O3/Fe2O3 sensors. Furthermore, the genetic algorithm has fine-tuned the shape-related parameters of the B-spline wavelet transfer function. This model accurately predicts the SRR of the 119 nanocomposite sensors with a mean absolute error of 0.7, absolute average relative deviation of 10.12%, root mean squared error of 1.14, and correlation coefficient of 0.95813. The In2O3-based nanocomposite with a 15 mol percent of Fe2O3 is the best sensor for detecting acetone at wide temperatures and concentration ranges. This type of reliable estimator is a step toward fully automating the gas-detecting ability of In2O3/Fe2O3 nanocomposite sensors.

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“…Therefore, it is important to modify the membranes with necessary hydrophilic modifications to improve the overall performance ( Sun et al, 2013 ; Zhao et al, 2015 ; Al Mayyahi, 2018 ). Many hydrophilic modification methods have been becoming hot, and such modification techniques mainly include surface grafting ( Sun and Feng, 2017 ; Dong et al, 2018 ; Wang et al, 2023 ), hybrid modification ( Qiu et al, 2018 ; Muchtar et al, 2019 ; Yu et al, 2022 ), and surface coating ( Zeng et al, 2016 ; Guo et al, 2017 ; Zhang et al, 2023 ). Compared with other methods, surface coating is not only easy to operate but can also be used for large-scale industrial applications.…”

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of superior hydrophilic PVDF/DA membranes by the self-polymerization approach of dopamine

Zhang

Sun

et al. 2023

Front. Chem.

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Polyvinylidene fluoride (PVDF) membranes are favored for their excellent properties. However, the inherent strong hydrophobicity of PVDF membranes limits their development in the field of water treatment. The objective of this study was to improve the performance of PVDF membranes using the self-polymerization, strong adhesion properties, and biocompatible effects of dopamine (DA). The PVDF/DA membrane modification conditions were simulated and optimized using response surface methodology (RSM), and the experimental design was used to investigate three main parameters. The results showed that the DA solution concentration of 1.65 g/L, the coating time of 4.5 h, the post-treatment temperature of 25°C, the contact angle decreased from 69° to 33.9°, and the pure water flux on the PVDF/DA membrane was higher than that on the original membrane. The absolute value of the relative error between the actual and predicted values is only 3.36 %. In the MBR parallel comparison test, compared with the PVDF/DA membrane, the total amount of extracellular polymers (EPS) of the PVDF membrane increased by 1.46 times and the polysaccharide increased by 1.56 times, which further showed that the PVDF/DA modified membrane had the excellent anti-pollution ability. Through Alpha diversity analysis, the biodiversity detected on PVDF/DA membranes was higher than that of PVDF membranes, which further proved its good bio-adhesion ability. These findings could offer a reference for the hydrophilicity, antifouling, and stability of PVDF/DA membranes, which would establish the foundation for the comprehensive applications in MBR.

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Catalytic ozonation mechanisms of Norfloxacin using Cu–CuFe2O4

Cited by 43 publications

References 59 publications

Synthesis and Characterization of Biodegradable Poly(vinyl alcohol)-Chitosan/Cellulose Hydrogel Beads for Efficient Removal of Pb(II), Cd(II), Zn(II), and Co(II) from Water

Synthesis and Characterization of Biodegradable Poly(vinyl alcohol)-Chitosan/Cellulose Hydrogel Beads for Efficient Removal of Pb(II), Cd(II), Zn(II), and Co(II) from Water

Wavelet-artificial neural network to predict the acetone sensing by indium oxide/iron oxide nanocomposites

Preparation and characterization of superior hydrophilic PVDF/DA membranes by the self-polymerization approach of dopamine

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