Electro-Oxidation of Humic Acids Using Platinum Electrodes: An Experimental Approach and Kinetic Modelling

Salvestrini, Stefano; Fenti, Angelo; Chianese, Simeone; Iovino, Pasquale; Musmarra, Dino

doi:10.3390/w12082250

Cited by 32 publications

(17 citation statements)

References 77 publications

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“…Recently, electrochemical oxidation (EO) has gained much attention as a very effective method for removing a wide range of pollutants. Efficiency and green performances are the main reasons this technique is very reliable and widely used [15]. EO processes are characterized by two approaches called direct electro-oxidation, or anodic oxidation, and indirect electro-oxidation, as discussed in section 3.…”

Section: Electrochemical Oxidation (Eo)mentioning

confidence: 99%

Application of Electrochemical Oxidation for Water and Wastewater Treatment: An Overview

Najafinejad¹,

Chianese²,

Fenti³

et al. 2023

Preprint

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In recent years, the discharge of various emerging pollutants, chemicals and dyes in water and wastewater has represented one of the prominent human problems. Since water pollution is directly related to human health, highly resistant and emerging compounds in aquatic environments will pose many potential risks to the health of all living. Therefore, water pollution is a very acute problem that has constantly increased in recent years with the expansion of various industries. Consequently, choosing efficient and innovative wastewater treatment methods to remove contaminants is crucial. Among advanced oxidation processes, electrochemical oxidation (EO) is the most common and effective method for removing persistent pollutants from municipal and industrial wastewater. However, there are still many gaps despite the great progress in using EO to treat real wastewater. This is due to the lack of comprehensive information on the operating parameters which affect the process and its operating costs. In this paper, among various scientific articles, the impact of operational parameters on the EO performances, a comparison between different electrochemical reactor configurations, and a report on general mechanisms of electrochemical oxidation of organic pollutants have been reported. Moreover, an evaluation of cost analysis and energy consumption requirements have also been discussed. Finally, the combination process between EO and another important advanced oxidation technology, PEC, called photoelectrocatalysis (PEC), has shortly been discussed and reviewed. This article showed that there is a direct relationship between important operating parameters with the amount of costs and the final removal efficiency of emerging pollutants. Optimal operating conditions can be achieved by paying special attention to reactor design, which can lead to higher efficiency and more efficient treatment. The rapid development of EO for removing emerging pollutants from impacted water and its combination with other green methods can result in more efficient approaches to face the pressing water pollution challenge.

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Section: Electrochemical Oxidation (Eo)mentioning

confidence: 99%

Application of Electrochemical Oxidation for Water and Wastewater Treatment: An Overview

Najafinejad¹,

Chianese²,

Fenti³

et al. 2023

Preprint

View full text Add to dashboard Cite

show abstract

“…EO is a technique belonging to the class of advanced oxidation processes (AOPs), which have proven to be very effective and reliable for removing emerging pollutants and NH 4 + -NH 3 from water [ 36 , 37 , 38 , 39 , 40 ]. The efficiency of the electrochemical treatments is influenced by several factors, including initial NH 4 + -NH 3 concentration, applied current intensity, pH, concentration and composition of the electrolyte, and type of anode material used [ 35 , 41 ].…”

Section: Introductionmentioning

confidence: 99%

“…The efficiency of the electrochemical treatments is influenced by several factors, including initial NH 4 + -NH 3 concentration, applied current intensity, pH, concentration and composition of the electrolyte, and type of anode material used [ 35 , 41 ]. Among these factors, the composition of the electrolyte, the applied current density, and the type of anode material used over the treatment are the most significant parameters impacting both efficiency of the process and the overall costs [ 40 ].…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Removal of Nitrogen Compounds from a Simulated Saline Wastewater

et al. 2023

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In the last few years, many industrial sectors have generated and discharged large volumes of saline wastewater into the environment. In the present work, the electrochemical removal of nitrogen compounds from synthetic saline wastewater was investigated through a lab-scale experimental reactor. Experiments were carried out to examine the impacts of the operational parameters, such as electrolyte composition and concentration, applied current intensity, and initial ammoniacal nitrogen concentration, on the total nitrogen removal efficiency. Using NaCl as an electrolyte, the NTOT removal was higher than Na2SO4 and NaClO4; however, increasing the initial NaCl concentration over 250 mg·L−1 resulted in no benefits for the NTOT removal efficiency. A rise in the current intensity from 0.05 A to 0.15 A resulted in an improvement in NTOT removal. Nevertheless, a further increase to 0.25 A led to basically no enhancement of the efficiency. A lower initial ammoniacal nitrogen concentration resulted in higher removal efficiency. The highest NTOT removal (about 75%) was achieved after 90 min of treatment operating with a NaCl concentration of 250 mg·L−1 at an applied current intensity of 0.15 A and with an initial ammoniacal nitrogen concentration of 13 mg·L−1. The nitrogen degradation mechanism proposed assumes a series–parallel reaction system, with a first step in which NH4+ is in equilibrium with NH3. Moreover, the nitrogen molar balance showed that the main product of nitrogen oxidation was N2, but NO3− was also detected. Collectively, electrochemical treatment is a promising approach for the removal of nitrogen compounds from impacted saline wastewater.

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“…Then, to determine the corresponding dosage of chemical reagents. Besides, it is well-known that advanced oxidation processes can be used to reduce organic water pollution (Salvestrini et al 2020;Gallo-Cordova et al 2021;Januário et al 2021). For example, Liu et al (2019) reported that ozone-based advanced oxidation process (AOP) and in particular combination of UV with ozone and H 2 O 2 is efficient to degrade micropollutants.…”

Section: Introductionmentioning

confidence: 99%

Limnoperna fortuneias an invasive biofouling bivalve species in freshwater: a review of its occurrence, biological traits, risks, and control strategies

Zhang

Xia-li

et al. 2022

Journal of Water Supply: Research and Technology-Aqua

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Concerns have been raised about the significant biofouling and environmental problems caused by the large numbers of Limnoperna fortunei clinging to water intake facilities. This review first provides a summary of the occurrence of L. fortunei in typical regions including China, South America, and Japan. Furthermore, this article provides a comprehensive overview of the biological traits, risks, and control of L. fortunei. Importantly, the planktonic larval stage is a critical period for the expansion of L. fortunei. Its biofouling process mainly relies on the adhesion of byssus to substrates. Various physical and chemical methods have been proposed and used to control L. fortunei. Among these methods, sodium hypochlorite has been shown to be effective in preventing the adhesion of L. fortunei by dissolving its byssus at much lower concentrations. Overall, effective and environmental-friendly antifouling strategies are still rare, particularly in drinking water treatment systems, and are encouraged to develop in future studies. This review not only provides a comprehensive understanding of L. fortunei but also helps to guide the prevention and control of L. fortunei.

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Electro-Oxidation of Humic Acids Using Platinum Electrodes: An Experimental Approach and Kinetic Modelling

Cited by 32 publications

References 77 publications

Application of Electrochemical Oxidation for Water and Wastewater Treatment: An Overview

Application of Electrochemical Oxidation for Water and Wastewater Treatment: An Overview

Electrochemical Removal of Nitrogen Compounds from a Simulated Saline Wastewater

Limnoperna fortuneias an invasive biofouling bivalve species in freshwater: a review of its occurrence, biological traits, risks, and control strategies

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