New approaches on heterogeneous electro-Fenton treatment of winery wastewater

Iglesias, Olalla; Meijide, Jéssica; Bocos, Elvira; Sanromán, M.A.

doi:10.1016/j.electacta.2015.04.062

Cited by 63 publications

(16 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Even though, $11 mg L 21 H 2 O 2 could be detected in 60 min by FZVN according to Eqs. (9) and (10) [31] (Supporting Information Fig. SI.1), Fenton-like reaction initiated by nickel is powerless since there is only a slight gap between E 0 Ni 31 /Ni 21 (11.74 V) and E 0 H2O2=H2O (11.776 V), confirmed by phenomenon that no MO decolorization was obtained when Ni 21 , H 2 O 2 , and MO were in the solution (data not show).…”

Section: Effect Of Oxygen On Mo Decolorizationmentioning

confidence: 92%

A rapid azo dye decolorization of methyl orange by the foam zero‐valent nickel

Deng

Yang

Zhu

et al. 2017

Env Prog and Sustain Energy

View full text Add to dashboard Cite

In this article, foam zero‐valent nickel (FZVN) was put forward as a promising zero‐valent metal for the pretreatment of azo dye wastewater (MO as a model contaminant). The characteristics of FZVN were evaluated by methods of Barrett‐Emmett‐Teller, scanning electron microscopy, X‐ray diffraction, and X‐ray photoelectron spectroscopy. Moreover, influence of key experimental parameters, including oxygen concentration, presence of different acid, pH, and temperature on the MO decolorization were systematically ascertained. Furthermore, possible mechanism of MO removal by FZVN was investigated by using Liquid chromatography‐mass spectrometry (LC‐MS). Results showed that FZVN was a three‐dimensional pore material with a specific surface area of 3 m2 g−1. Moreover, anoxic condition, presence of acetic acid, higher temperatures and acid conditions were beneficial to decolorize MO by FZVN while the decolorization process obeyed the first order kinetic model with an apparent rate constant (kapp) of 0.162 min−1 at pH value of 4 (25°C). The activation energy Ea obtained from the decolorization reaction was 83.1 kJ mol−1. Based on LC‐MS results, the role of FZVN in the decolorization reaction process was suggested as follows: strong reductive, catalysis, and adsorption. © 2017 American Institute of Chemical Engineers Environ Prog, 37: 686–694, 2018

show abstract

Section: Effect Of Oxygen On Mo Decolorizationmentioning

confidence: 92%

A rapid azo dye decolorization of methyl orange by the foam zero‐valent nickel

Deng

Yang

Zhu

et al. 2017

Env Prog and Sustain Energy

View full text Add to dashboard Cite

show abstract

“…Application of electro‐Fenton on synthetic WiWW has led to 82% COD decrease within 24 h of treatment, 53 while photo electro‐Fenton has shown higher performance being able of reducing COD, TOC, and toxicity up to 77, 67, and 76.5% after 12 h of treatment 54–56 …”

Section: Advanced Oxidation Processesmentioning

confidence: 99%

Advanced oxidation processes for the treatment of winery wastewater: a review and future perspectives

Davididou

Frontistis

2021

J of Chemical Tech & Biotech

View full text Add to dashboard Cite

Winemaking is a water‐intensive operation; it is estimated that 70% of the water input is downgraded, mainly via cleaning processes, to wastewater. The quality and the quantity of the waste effluents vary considerably due to the seasonal operation of wineries and the diversity of winemaking technologies applied. High organic load, acidic pH, significant polyphenolic content, and residual concentration of phytosanitary products are included among the main characteristics of winery wastewater (WiWW). Discharge of untreated or partially treated WiWW into watercourses or land poses high environmental risks. To this end, biological oxidation has been thoroughly studied for the treatment of WiWW yielding up to 95% reduction of chemical oxygen demand (COD) at a low cost and in an environmentally benign manner. Biological treatment, however, cannot provide a barrier to the slip of bio‐recalcitrant compounds present in WiWW, such as phenols and pesticides, into the environment. The release of these compounds raises serious concerns over ecological well‐being due to their toxicity and endocrine‐disrupting effects. Sustainable post‐treatment technologies are sought, able of breaking down the bio‐recalcitrant fraction of WiWW to harmless products without stressing the environmental resources. Advanced oxidation processes (AOPs) can offer a sound technological solution towards the integrated WiWW treatment. This paper presents an up‐to‐date overview of the AOPs (TiO2‐, sulfate radical‐, Fe‐, ozone‐based AOPs, and wet oxidation processes) that have been studied for the treatment of WiWW, remarks the most efficient ones, and identifies research areas and concepts aiming towards process sustainability and, ultimately, actual application. © 2021 Society of Chemical Industry (SCI).

show abstract

“…In more recent years, heterogeneous E-Fenton has emerged as a solution to the issues with iron hydroxide precipitation [8][9][10]. In this case, iron catalysts are incorporated as solids, usually oxides, such as Fe 3 O 4 , into a suitable electrode material.…”

Section: Introductionmentioning

confidence: 99%

Graphene-Modified Composites and Electrodes and Their Potential Applications in the Electro-Fenton Process

Tian

Breslin

2020

Materials

View full text Add to dashboard Cite

In recent years, graphene-based materials have been identified as an emerging and promising new material in electro-Fenton, with the potential to form highly efficient metal-free catalysts that can be employed in the removal of contaminants from water, conserving precious water resources. In this review, the recent applications of graphene-based materials in electro-Fenton are described and discussed. Initially, homogenous and heterogenous electro-Fenton methods are briefly introduced, highlighting the importance of the generation of H2O2 from the two-electron reduction of dissolved oxygen and its catalysed decomposition to produce reactive and oxidising hydroxy radicals. Next, the promising applications of graphene-based electrodes in promoting this two-electron oxygen reduction reaction are considered and this is followed by an account of the various graphene-based materials that have been used successfully to give highly efficient graphene-based cathodes in electro-Fenton. In particular, graphene-based composites that have been combined with other carbonaceous materials, doped with nitrogen, formed as highly porous aerogels, three-dimensional materials and porous gas diffusion electrodes, used as supports for iron oxides and functionalised with ferrocene and employed in the more effective heterogeneous electro-Fenton, are all reviewed. It is perfectly clear that graphene-based materials have the potential to degrade and mineralise dyes, pharmaceutical compounds, antibiotics, phenolic compounds and show tremendous potential in electro-Fenton and other advanced oxidation processes.

show abstract

New approaches on heterogeneous electro-Fenton treatment of winery wastewater

Cited by 63 publications

References 44 publications

A rapid azo dye decolorization of methyl orange by the foam zero‐valent nickel

A rapid azo dye decolorization of methyl orange by the foam zero‐valent nickel

Advanced oxidation processes for the treatment of winery wastewater: a review and future perspectives

Graphene-Modified Composites and Electrodes and Their Potential Applications in the Electro-Fenton Process

Contact Info

Product

Resources

About