Improving the sustainability of heterogeneous Fenton-based methods for micropollutant abatement by electrochemical coupling

Conde, Julio J.; Abelleira, Santiago; Estévez, Sofía; González-Rodríguez, Jorge; Feijoó, Gumersindo; Moreira, María Teresa

doi:10.1016/j.jenvman.2023.117308

Cited by 12 publications

(1 citation statement)

References 28 publications

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“…In particular, the addition of concentrated strong mineral acids to the wastewater to be treated, raises concerns about using hazardous chemicals (3rd, 5th, 8th and 12th principles); moreover, the required neutralization post-treatment step, leading to the formation of sludges, does not meet the 1st principle. Another critical point is related to the large amount of hydrogen peroxide required to carry out these processes which disattends the 2nd Principle, raises the operative costs due to the very expensive H 2 O 2 and has high environmental impacts associated with the process, as proved in the few Life Cycle Assessment (LCA) studies of Fenton processes reported in the literature [6,7]. Thus, it is noteworthy that the same issues affecting the practicability of Fenton on a large scale, also impair its sustainability.…”

Section: Critical Discussionmentioning

confidence: 99%

Sustainable-by-Design Approach of Active Catalysts to Produce Reactive Oxygen Species in Water Matrices

Prete

2024

Sustainable Chemistry

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Section: Critical Discussionmentioning

confidence: 99%

Sustainable-by-Design Approach of Active Catalysts to Produce Reactive Oxygen Species in Water Matrices

Prete

2024

Sustainable Chemistry

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Comparative life cycle assessment of sequential chemical and electrochemical processes for the treatment of industrial textile wastewater

Salazar-Sogamoso,

Gómez-García,

Dobrosz-Gómez

2024

J Solid State Electrochem

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Fenton-based processes, chemical and electrochemical, have attracted the interest of industrial and academic researchers for wastewater treatment. However, the deficiency of rigorous comparison between different methods, including assessment of their impact on the environment, has hindered their large-scale application. This study reports for the first time on the sustainability of raw textile wastewater treatment through two sequential processes, Coagulation-Flocculation-Fenton-Neutralization (CF-F-N) and Coagulation-Flocculation-Electro-Fenton-Neutralization (CF-EF-N), based on Life Cycle Assessment (LCA) approach. The CF-F-N and CF-EF-N were optimized at laboratory scale and compared through LCA, using the IPCC-2013 and ReCiPe-2016 midpoint and endpoint methods. The highest CO2 emissions relied on the wastewater primary treatment by CF. This due to the high amount of hazardous sludge generated and the technology necessary for its disposal (i.e., 16.89 kg CO2-Eq/FU for underground deposit in security cells or 47.52 kg CO2-Eq/FU for incineration) as well as the consumption of reagents required for the treatment (alum, 7.72 kg CO2-Eq/FU; and slaked lime, 5.56 kg CO2-Eq/FU). Regarding the sequential processes, the EF-N presented lower carbon footprint (CFP) than the F-N (14.74 kg CO2-Eq/FU vs. 20.74 kg CO2-Eq/FU). Electricity (87.02% of the total CFP) and reagents (88.63% of the total CFP) denoted the main environmental hotspot during the EF-N and F-N, respectively. The EF-N, compared to the F-N, had an inferior incidence in 14 of the 18 impact categories analyzed using the ReCiPe-2016 method at the midpoint level. This is the result of low consumption of reagents and auxiliary chemicals. The electricity was also found as main environmental hotspot of the EF-N. The ReCiPe-2016 method at the endpoint level showed that the EF-N resulted in lower environmental load in all impact categories. The economic performance (11.91 USD/m3 for CF-EF-N vs. 13.66 USD/m3 for CF-F-N) and LCA demonstrated the competitiveness of the electrochemical sequential process compared to the chemical one. The CF-EF-N can be considered more environmentally sustainable technology.

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The resin-supported iron-copper bimetallic composite as highly active heterogeneous Fenton-like catalysts for degradation of gaseous toluene

Zhou

Zhang

et al. 2023

Environ Sci Pollut Res

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Improving the sustainability of heterogeneous Fenton-based methods for micropollutant abatement by electrochemical coupling

Cited by 12 publications

References 28 publications

Sustainable-by-Design Approach of Active Catalysts to Produce Reactive Oxygen Species in Water Matrices

Sustainable-by-Design Approach of Active Catalysts to Produce Reactive Oxygen Species in Water Matrices

Comparative life cycle assessment of sequential chemical and electrochemical processes for the treatment of industrial textile wastewater

The resin-supported iron-copper bimetallic composite as highly active heterogeneous Fenton-like catalysts for degradation of gaseous toluene

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