Electrochemically-based hybrid oxidative technologies for the treatment of micropollutants in drinking water

Souza, F.L.; Zougagh, Mohammed; Sáez, Cristina; Cañizares, Pablo; Ríos, Ángel; Rodrigo, Manuel A.

doi:10.1016/j.cej.2021.128531

Cited by 23 publications

(4 citation statements)

References 69 publications

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“…where c e is the adsorption equilibrium concentration of metal ions in the solution (mg/L), K L is the Langmuir constant (L/mg), q m is the saturated adsorption capacity, 1/n is the adsorption strength, and K F is the Freundlich constant (L/mg). The Gibbs free energy (ΔG), enthalpy (ΔH), and entropy (ΔS) can be calculated from equations (7), (8) (9) and (10) [23]…”

Section: Characterization Scanning Electron Microscopy (Semmentioning

confidence: 99%

“…Long-term exposure to excessive amounts of Cd can cause damage to the human kidney and liver and may even cause carcinogenic and teratogenic lesions [5]. For this reason, various high-efficiency water treatment technologies, such as chemical precipitation, ion exchange, flotation, membrane filtration [6], electrochemical treatment [7], coagulation-flocculation, and adsorption, are used to remove Cd(II) [8]. Compared with other methods, the adsorption method has the advantages of high efficiency, excellent performance, easy operation, low cost, and environmental friendliness [9].…”

Section: Introductionmentioning

confidence: 99%

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Electron-Scale Insights into the Single and Coadsorption Cd(II) Behaviors of a Metal-Nonmetal-Modified Titanium Dioxide

Ren

Zheng

Yang

et al. 2021

Adsorption Science & Technology

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Metal (Fe) and nonmetal (P) were used to modify TiO2, and then, several functional groups such as P-O, P=O, Fe-O, and -OH were introduced on its surface to enhance the adsorption capacity for Cd(II), which could reach 121 mg/g. According to the experimental analysis of adsorption performance, chemical adsorption dominates the adsorption process, and the adsorption capacity increases with increasing temperature within a certain range. The results of competitive adsorption experiments showed that both Pb(II) and Cu(II) affect the adsorption of Cd(II) and that the adsorption order of P-Fe-TiO2 for heavy metal ions is Pb II > Cd II > Cu II . We further investigated the adsorption mechanism of P-Fe-TiO2 for Cd(II) and the reasons for the difference in competitive adsorption and used DFT calculations to confirm the experimental results. In the analysis of binding energy and frontier molecular orbitals (FMOs), we confirmed that charge transfer occurred during the adsorption process, so chemical reactions occurred. The binding energy of P-Fe-TiO2 and Pb(II) is the largest. The results of the competitive adsorption experiment also confirmed that the adsorbent has the greatest effect on Pb. Mulliken analysis was used to identify the best binding site on the adsorbent. The results of electrostatic potential, total potential, and differential charge analysis further prove the conclusions described above.

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Section: Characterization Scanning Electron Microscopy (Semmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Electron-Scale Insights into the Single and Coadsorption Cd(II) Behaviors of a Metal-Nonmetal-Modified Titanium Dioxide

Ren

Zheng

Yang

et al. 2021

Adsorption Science & Technology

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“…[20] Rodrigo et al largely investigated the coupling of two or more (photo-) electrooxidation processes, such as photo-electrooxidation coupled to zero-valent iron (ZVI), resulting in a very high (around 100 %) removal of chloro-containing compounds in both drinking water and soil effluents. [30][31][32] However, their potential scale-up is still rather difficult. Besides, electroreductive processes have gained a large scientific attention due to either their potentiality in chemical recovering/recycling or in the value-added substance productions, [33][34][35][36][37] in particular when halocompounds in wastewater streams have to be treated.…”

Section: Introductionmentioning

confidence: 99%

“…Rodrigo et al. largely investigated the coupling of two or more (photo‐)electrooxidation processes, such as photo‐electrooxidation coupled to zero‐valent iron (ZVI), resulting in a very high (around 100 %) removal of chloro‐containing compounds in both drinking water and soil effluents [30–32] . However, their potential scale‐up is still rather difficult.…”

Section: Introductionmentioning

confidence: 99%

Hydrodehalogenation of Polychloromethanes on Silver‐Based Gas Diffusion Electrodes

et al. 2021

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This work reports the electroreduction of a volatile organic halide (trichloromethane) from an airborn stream. In the past years, we highlighted the role of polycrystalline silver as powerful electrocatalyst for the electroreductive hydrodehalogenation of volatile organic halides (VOH) in water/organic solvent mixtures, from 0 to 100 % of the aqueous component. The successful conversion of trichloromethane and 1,1,1-trichloethane to the relevant dehalogenated compounds, methane and ethane have prompted us to extend the investigations to the treatment of gaseous effluents, adopting a silver Gas Diffusion Electrode (Ag-GDE) and the appropriate cell design. In the field of electroreduction processes the possibility of using GDE to treat gaseous effluents for the removal of volatile organic pollutants represents an electrochemical challenge, and the treatment of N 2 /CHCl 3 gas mixtures fed into the cathodic Ag-GDE compartment demonstrates the feasibility of the electroreductive detoxification process. Our results will be presented and discussed in terms of CHCl 3 removal efficiency, selectivity and energy consumption in preparative electrolyses.

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Microbiological Contaminants in Drinking Water: Current Status and Challenges

Kristanti¹,

Hadibarata

Syafrudin

et al. 2022

Water Air Soil Pollut

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Electrochemically-based hybrid oxidative technologies for the treatment of micropollutants in drinking water

Cited by 23 publications

References 69 publications

Electron-Scale Insights into the Single and Coadsorption Cd(II) Behaviors of a Metal-Nonmetal-Modified Titanium Dioxide

Electron-Scale Insights into the Single and Coadsorption Cd(II) Behaviors of a Metal-Nonmetal-Modified Titanium Dioxide

Hydrodehalogenation of Polychloromethanes on Silver‐Based Gas Diffusion Electrodes

Microbiological Contaminants in Drinking Water: Current Status and Challenges

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