Evaluation of the toxicity reduction of an ionic liquid solution electrochemically treated using BDD films with different sp3/sp2 ratios

Marcionilio, Suzana Maria Loures de Oliveira; Araújo, Danyelle Medeiros de; Nascimento, Thaise de V.; Martínez‐Huitle, Carlos A.; Linares, J.

doi:10.1016/j.elecom.2020.106792

Cited by 18 publications

(6 citation statements)

References 37 publications

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“…BDD anode is currently considered the best anode for AO [8,10,17,22] approach, and its ability to mineralize aromatics and carboxylic acids has been well proven [5,[23][24][25]. It has been successfully used for removing pharmaceuticals [26,27], dyes [28], petroleum [29], pesticides, and herbicides [30].…”

Section: Dedicated To Prof Fritz Scholz On the Occasion Of His 65th Birthdaymentioning

confidence: 99%

“…In order to understand the experimental behavior, a study about the molecular structures and electronic properties is a great idea. In this way, the geometric optimization of structures calculations and the frontier orbitals were estimated in vacuum by using the package Orca [20] using calculations of DFT [36][37][38] hybrid functional B3LYP [21][22][23] and basis set 6-31G [23][24][25][26] and (2d,2p) [27][28][29][30]. To do that, the use of DFT is possible to investigate the contribution of the frontier orbitals on the electrochemical behavior of chemical species [39,40], even when it is necessary to evaluate the applications and limitations of these studies.…”

Section: Theoretical Chemistry Study: Dftmentioning

confidence: 99%

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Understanding the electrochemical oxidation of dyes on platinum and boron–doped diamond electrode surfaces: experimental and computational study

Soares

Silva

Santos

et al. 2020

J Solid State Electrochem

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Anodic oxidation (AO) approach proceeds via direct and indirect electrochemical pathways and their subsequent reactions. The interest to elucidate the mechanisms for removing dyes from water contributes to the understanding of more complex reactions involving organic pollutants towards anode surfaces. The present study was motivated by the reports that promote the use of AO for removing different organic compounds but no considerations about the influence of different functional groups in their structure have been discussed. Therefore, we have evaluated the influence of different functional groups in the dye structure (Reactive Orange 16, Reactive Violet 4, Reactive Red 228, and Reactive Black 5) by potentiodynamic measurements and by computational analyzes using density functional theory (DFT). The computational studies have allowed to carry out morphological studies on the frontier orbitals where the electrons are more energetic and then, the electron-transfer to electrode surface is achieved, which was associated to the electrochemical measurements (current-potential profiles). Also, the theoretical studies were used to understand the bulk electrolysis, in terms of mineralization. The results clearly demonstrate that organic molecules can be degraded in different way and level due to the oxidants electrochemically generated as well as the interaction of dyes with anode surface by adsorbed/non-adsorbed intermediates. Conversely, the decolorization mechanisms, which are related to the fragmentation of chromophore group, are associated to the direct AO approach, favoring different order of elimination, as already reported in our previous work. The results were discussed in light of the existing literature.

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Section: Dedicated To Prof Fritz Scholz On the Occasion Of His 65th Birthdaymentioning

confidence: 99%

Section: Theoretical Chemistry Study: Dftmentioning

confidence: 99%

Understanding the electrochemical oxidation of dyes on platinum and boron–doped diamond electrode surfaces: experimental and computational study

Soares

Silva

Santos

et al. 2020

J Solid State Electrochem

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“…This importance is due to some of their properties, such as low vapor pressure, low volatility, low flammability, thermal stability, etc. [ 23 ], though their friendly environmental status is under debate [ 24 , 25 ]. Ionic liquids can also be divided into some subfamilies [ 26 ]: (i) aprotic ionic liquids and task-specific ionic liquids, both types considered as fully ionic; (ii) protic ionic liquids, generated by the reaction of an acid and a base; and (iii) pseudo-protic ionic liquids (PPILs), which are generated by the reaction of an acid and a base, but sometimes considered not fully ionic.…”

Section: Introductionmentioning

confidence: 99%

On the Use of Pseudo-Protic Ionic Liquids to Extract Gold(III) from HCl Solutions

Robla

2023

IJMS

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Solvent extraction of gold(III) from HCl media using pseudo-protic ionic liquids (PPILs) dissolved in toluene as the extractant phase is investigated. Three PPILs are generated from the reaction of commercially available amines and 1 M HCl solution and named as pri-NH2H+Cl- (derived from the primary amine Primene 81R), sec-NHH+Cl− (derived from the secondary amine Amberlite LA2) and ter-NH+Cl− (derived from the tertiary amine Hostarex A327). In the above structures, -NH2H+Cl−, -NHH+Cl− and -NH+Cl− represented the active groups (anion exchangers) of the respective PPIL. In the case of gold(III) extraction, the experimental variables investigated included the equilibration time (2.5–30 min), temperature (20–60 °C), HCl concentrations (1–10 M) in the aqueous phase, gold(III) concentration (0.005–0.05 g/L) in this same phase, and PPILs concentrations in the organic phase. From the experimental data, and using the Specific Interaction Theory, the interaction coefficients (ε) for the pair AuCl4−, H+ are estimated for the systems involving the three PPILs. Gold(III) is recovered from the metal-loaded organic phases using sodium thiocyanate solutions, and from these, gold is finally recovered by the precipitation of zero-valent gold (ZVG) nanoparticles.

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“…It is important to remember that the term of ionic liquids includes those chemicals that are composed only of ions (anion and cation), which are liquids at temperatures below 100 °C. Due to their properties of negligible vapour pressure, non-molecular solvents, high thermal stability, adjustable viscosity and miscibility with organic solvents and water [ 15 ], ionic liquids are considered green solvents ; however, some authors questioned some of these properties, i.e., stability [ 16 ]. A special case of these compounds was the pseudo-protic ionic liquids (PPILS) formed from tertiary amines [ 17 , 18 ].…”

Section: Introductionmentioning

confidence: 99%

The Pseudo-Protic Ionic Liquids TOAH+Cl− and TODAH+Cl− as Carriers for Facilitated Transport of In(III) from HCl Solutions

López¹

2022

Membranes

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A study of indium(III) transport across an immobilized liquid membrane using the pseudo-protic ionic liquids TOAH+Cl− and TODAH+Cl− as carriers has been carried out using batch experiments. Metal transport is investigated as a function of different variables: hydrodynamic conditions in the feed (375–1500 min−1) and receiving (500–750 min−1) phases, HCl (0.5–7 M) and indium (0.01–0.2 g/L) concentrations in the feed phase and carrier (1.25–40% v/v) concentration in the membrane phase. Indium is conveniently recovered in the receiving phase, using a 0.1 M HCl solution. Models are reported describing the transport mechanism, which consists of a diffusion process through the feed aqueous diffusion layer, fast interfacial chemical reaction, and diffusion of the respective indium-pseudo-protic ionic liquid through the membrane. The equations describing the rate of transport are derived by correlating the membrane permeability coefficient to diffusional and equilibrium parameters as well as the chemical composition of the respective indium-pseudo-protic ionic liquid system, i.e., the carrier concentration in the membrane phase. The models allow us to estimate diffusional parameters associated with each of the systems; in addition, the minimum thickness of the feed boundary layer is calculated as 3.3 × 10−3 cm and 4.3 × 10−3 cm for the In-TOAH+Cl− and In-TODAH+Cl− systems, respectively.

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Evaluation of the toxicity reduction of an ionic liquid solution electrochemically treated using BDD films with different sp3/sp2 ratios

Cited by 18 publications

References 37 publications

Understanding the electrochemical oxidation of dyes on platinum and boron–doped diamond electrode surfaces: experimental and computational study

Understanding the electrochemical oxidation of dyes on platinum and boron–doped diamond electrode surfaces: experimental and computational study

On the Use of Pseudo-Protic Ionic Liquids to Extract Gold(III) from HCl Solutions

The Pseudo-Protic Ionic Liquids TOAH+Cl− and TODAH+Cl− as Carriers for Facilitated Transport of In(III) from HCl Solutions

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