Removal of diclofenac by three-dimensional electro-Fenton-persulfate (3D electro-Fenton-PS)

Long, Yingying; Feng, Yi; Li, Xue; Suo, Ning; Chen, Hao; Wang, Zhongwei; Yu, Youming

doi:10.1016/j.chemosphere.2018.12.054

Cited by 78 publications

(24 citation statements)

References 40 publications

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“…Diclofenac (DCF) was selected as the target pollutant, because of its ubiquity in aqueous media as mentioned above. Moreover, special attention is given recently to the removal of DCF from water with various methods (adsorption, oxidation, photocatalysis) [48,49,50,51,52]. DCF has several reactive groups like –Cl, –COOH and >NH, which can interact with chitosan’s >NH 2 and –OH groups.…”

Section: Introductionmentioning

confidence: 99%

Chitosan Grafted Adsorbents for Diclofenac Pharmaceutical Compound Removal from Single-Component Aqueous Solutions and Mixtures

et al. 2019

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The main purpose of this study was to investigate the synthesis of some cross-linked carboxyl-grafted chitosan derivatives to be used as selective adsorbents for diclofenac (DCF) pharmaceutical compounds from aqueous mixtures. Four different materials were synthesized using succinic anhydride (CsSUC), maleic anhydride (CsMAL), itaconic acid (CsITA), and trans-aconitic acid (CsTACON) as grafting agents. After synthesis, scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FTIR), and X-ray diffraction (XRD) were performed before and after DCF adsorption. In addition, a complete adsorption evaluation was carried out for all materials studying some important parameters. The optimum pH was 4; the amino groups of DCF can be protonated at pH = 4 (–NH+), so this groups can easily attract the clear negatively carboxyl moieties (–COO−) of the chitosan adsorbents. The Qm for CsTACON was higher than those of the other materials, at all temperatures studied. By altering the temperature from 25 to 35 °C, an increase (16%) of Qm (from 84.56 to 98.34 mg g−1) was noted, while similar behavior was revealed after a further increase of temperature from 35 to 45 °C, improving by 5% (from 98.34 to 102.75 mg g−1). All isotherms were fitted to Langmuir, Freundlich, and Langmuir-Freundlich (L-F) models). In addition, a kinetic model was proposed taking into account not only the interactions but also the diffusivity of the molecule (DCF) into the polymeric network. The behavior of the prepared chitosan materials in simultaneously removing other compounds (synergetic or antagonistic) was also evaluated by experiments performed in mixtures. DCF presented the highest removal from the mixture in the order: CsTACON (92.8%) > CsITA (89.5%) > CsSUC (80.9%) > CsMAL (66.2%) compared to other pharmaceutical compounds (salicylic acid, ibuprofen and ketoprofen). Desorption was achieved by using different eluants (either water or organic). The highest desorption ability was found for acetone (100% for CsTACON, CsSUC, CsMAL and 77% for CsITA) for all materials.

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Section: Introductionmentioning

confidence: 99%

Chitosan Grafted Adsorbents for Diclofenac Pharmaceutical Compound Removal from Single-Component Aqueous Solutions and Mixtures

et al. 2019

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“…Sruthi et al studied the potential of Fenton‐based processes in the treatment of landfill leachate and reported that the electro‐Fenton system has high COD removal efficiency and required a low dose of the catalyst compared to the Fenton process . Despite its high oxidation ability, the conventional electro‐Fenton process, due to the use of the 2D electrochemical process in practical applications, has disadvantages such as loss of soluble iron, operation only at acidic pH, low current efficiency and long mass‐transfer distance . To improve these problems, the particles were loaded between the anode and the cathode as a particle electrode and a supporting material .…”

Section: Introductionmentioning

confidence: 99%

“…19,20 To improve these problems, the particles were loaded between the anode and the cathode as a particle electrode and a supporting material. 20 During the application of the appropriate voltage in the electro-Fenton process, the particles are polarized in the form of microelectrodes that can not only reduce the distance between the electrode and the pollutant, but also provide active sites for absorbing the contaminants and for increasing the mass transfer. In addition, the particles as a third electrode can increase catalytic reactions, such as electrochemical reduction of O 2 to H 2 O 2 and its degradation into •OH by direct decomposition and loading of Fe 2+ onto the particle surface.…”

Section: Introductionmentioning

confidence: 99%

“…In addition, the particles as a third electrode can increase catalytic reactions, such as electrochemical reduction of O 2 to H 2 O 2 and its degradation into •OH by direct decomposition and loading of Fe 2+ onto the particle surface. [20][21][22][23] In recent years, researchers have suggested the use of activated carbon, 24 kaolin, 22 nickel foam, 23 bentonite 25 and carbon nanotubes 10 as the supporting material and particle electrode. Amongst these, nickel foam has shown unique properties such as high conductivity, high porosity, high specific surface area and resistance to corrosion giving enhanced mechanical durability and catalytic activity, leading to its use in various fields as catalyst, ion exchanger and supporting material.…”

Section: Introductionmentioning

confidence: 99%

“…Despite its high oxidation ability, the conventional electro‐Fenton process, due to the use of the 2D electrochemical process in practical applications, has disadvantages such as loss of soluble iron, operation only at acidic pH, low current efficiency and long mass‐transfer distance . To improve these problems, the particles were loaded between the anode and the cathode as a particle electrode and a supporting material . During the application of the appropriate voltage in the electro‐Fenton process, the particles are polarized in the form of microelectrodes that can not only reduce the distance between the electrode and the pollutant, but also provide active sites for absorbing the contaminants and for increasing the mass transfer.…”

Section: Introductionmentioning

confidence: 99%

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Optimization of the 3D electro‐Fenton process in removal of acid orange 10 from aqueous solutions by response surface methodology

Mohammadi

Alinejad

Khajeh

et al. 2019

J of Chemical Tech & Biotech

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BACKGROUND In recent decades, rapid population growth and industrial development have led to the release of toxic compounds into water resources. Several technologies have been proposed to address the problem, and among them, the 3D electro‐Fenton process has found great popularity due to its high efficiency and simple operation. In the 3D electro‐Fenton process, the type of particle electrode is one of the most important factors owing to its impact on the reduction of energy consumption and generation of reactive species. In the present study, the optimization of the 3D electro‐Fenton process coupled with iron‐coated nickel foam (NF‐Fe), as a new particle electrode, in the removal of acid orange 10 was investigated using response surface methodology (RSM). RESULTS The RSM results showed that the quadratic model has a high R2 and high F‐value based on ANOVA analysis. The optimum efficiency of dye removal (99.15%) was obtained at pH 5.6, an NF‐Fe dosage of 0.68 g L−1, a time of 34.6 min, and current density of 23.62 mA cm−2. Comparative tests showed the high efficiency of the 3D electro‐Fenton process compared to other electrochemical systems. Quenching experiments demonstrated the production of different reactive species in the 3D process. The stability experiment proved that the NF‐Fe has a high potential to improve the long‐term degradation of dye. CONCLUSIONS Due to its high efficiency, production of more reactive species and excellent stability of the NF‐Fe electrode, this 3D electro‐Fenton process is an excellent option for removal of dye from aqueous solutions. © 2019 Society of Chemical Industry

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UV‐C Activation of Peroxides for Bisphenol A Removal from a Real Water Sample

Öztürk

Ucun

Arslan-Alaton

2021

CLEAN Soil Air Water

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The peroxides peracetic acid (PAA) and percarbonate (PC) are applied for UV‐C‐based advanced oxidation of the endocrine disrupting micropollutant bisphenol A (BPA; 2 mg L−1 = 8.76 µm) in pure and tap water. Their performance is compared with the more conventional hydrogen peroxide (HP)‐ and persulfate (PS)‐activated UV‐C treatments. Acidic and neutral pH values, 4 and 7, result in faster BPA removals with HP‐ and PS‐activated UV‐C treatments, respectively, whereas higher BPA removal rates are obtained at acidic and alkaline pH values, 4 and 10, with the PC/UV‐C and PAA/UV‐C treatments, respectively. Increasing the peroxide concentrations enhances BPA removals with the exception of PC/UV‐C treatment where an asymptotic removal rate is ultimately reached due to the inhibitory effect of increasing alkalinity. The order of total organic carbon (TOC) removal for the BPA‐spiked tap water (TW) (TOC ≈ 5 mg L−1 with added BPA) is TOCPAA/UV‐C (16%) < TOCPS/UV‐C (24%) < TOCHP/UV‐C (27%) < TOCPC/UV‐C (35%). BPA removal is most negatively affected for the HP/UV‐C processes, whereas the PC/UV‐C process outperformed the other peroxide/UV‐C treatments in terms of TOC removal due to the differences in the reactivity/selectivity of the in situ formed free radical types that may become important when working with real water. The originally low toxicity toward the marine photobacterium Vibrio fischeri and the freshwater crustacean Daphnia magna fluctuated during photochemical treatments.

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Removal of diclofenac by three-dimensional electro-Fenton-persulfate (3D electro-Fenton-PS)

Cited by 78 publications

References 40 publications

Chitosan Grafted Adsorbents for Diclofenac Pharmaceutical Compound Removal from Single-Component Aqueous Solutions and Mixtures

Chitosan Grafted Adsorbents for Diclofenac Pharmaceutical Compound Removal from Single-Component Aqueous Solutions and Mixtures

Optimization of the 3D electro‐Fenton process in removal of acid orange 10 from aqueous solutions by response surface methodology

UV‐C Activation of Peroxides for Bisphenol A Removal from a Real Water Sample

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