Fenton-based technologies as efficient advanced oxidation processes for microcystin-LR degradation

Liang, Danhui; Li, Nan; An, Jingkun; Ma, Jianmin; Wu, Yu; Liu, Hongbo

doi:10.1016/j.scitotenv.2020.141809

Cited by 65 publications

(18 citation statements)

References 120 publications

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“…Compared with the literature data, attained using hydrogen peroxide or persulfate and Fe 2+ salts or ZVI nanoparticles as an iron source, at the same pH values as used in this study (6)(7), the mineralization efficiency can be considered practically nil [33,42,48,49]. Comparable degradation efficiencies of already-reported photo-Fenton systems are reported to be achieved only under acidic pH values (3)(4), which generate total iron concentrations in solution ranging from 0.6 to 150 mg/L. Compared to this study, these values are up to 38 times higher, necessitating further separation steps in a real-life wastewater treatment pilot installation.…”

Section: Resultsmentioning

confidence: 53%

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Austenitic Stainless Steel as a Catalyst Material for Photo-Fenton Degradation of Organic Dyes

et al. 2022

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In this paper, a typical austenitic stainless steel was used as a catalyst in the visible photo-Fenton degradation process of two model dyes, methylene blue and methylorange, in the presence of hydrogen peroxide and potassium persulfate as free radical-generating species. The concentration intervals for both peroxide and persulfate were in the range of 333–1667 μg/L. Very high photodecoloration efficiencies have been achieved using peroxide (>93%), while moderate ones have been achieved using persulfate (>75%) at a pH value of 6.5. For methylene blue, the maximum mineralization yield of 74.5% was achieved using 1665 μg/L of hydrogen peroxide, while methylorange was better mineralized using 999 μg/L of persulfate. The photodegradation of the dye occurred in two distinct steps, which were successfully modeled by the Langmuir–Hinshelwood pseudo-first-order kinetic model. Reaction rate constants k between 0.1 and 4.05 h−1 were observed, comparable to those presented in the reference literature at lower pH values and higher concentrations of total iron from the aqueous media.

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Section: Resultsmentioning

confidence: 53%

“…Advanced oxidation processes (AOPs) such as the Fenton process have been known to have a much more economically efficient upscaling potential and a relatively low environmental impact compared with heterogeneous semiconductor photocatalysis-based AOPs [3,4].…”

Section: Introductionmentioning

confidence: 99%

Austenitic Stainless Steel as a Catalyst Material for Photo-Fenton Degradation of Organic Dyes

et al. 2022

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“…Compared with PS, H 2 O 2 is a more economical oxidant, and its cost is only about onequarter of that of PS. Related results 67,68,69 have showed that H 2 O 2 /PS double oxidants activation system had good synergistic activation effect in increasing the yield and utilization of free radicals and the removal efficiency of pollutants. Hence, Liu et al 158 further proposed a microwaveactivated H 2 O 2 /PS double oxidants system to remove NO from flue gas, and conducted a series of experiments and characterization analysis for the NO removal using this system.…”

Section: Electrochemical Somentioning

confidence: 99%

A Critical Review on Removal of Gaseous Pollutants Using Sulfate Radical-based Advanced Oxidation Technologies

Liu

Wang

2021

Environ. Sci. Technol.

105

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Excessive emissions of gaseous pollutants such as SO2, NO x , heavy metals (Hg, As, etc.), H2S, VOCs, etc. have triggered a series of environmental pollution incidents. Sulfate radical (SO4•–)-based advanced oxidation technologies (AOTs) are one of the most promising gaseous pollutants removal technologies because they can not only produce active free radicals with strong oxidation ability to simultaneously degrade most of gaseous pollutants, but also their reaction processes are environmentally friendly. However, so far, the special review focusing on gaseous pollutants removal using SO4•–-based AOTs is not reported. This review reports the latest advances in removal of gaseous pollutants (e.g., SO2, NO x , Hg, As, H2S, and VOCs) using SO4•–-based AOTs. The performance, mechanism, active species identification and advantages/disadvantages of these removal technologies using SO4•–-based AOTs are reviewed. The existing challenges and further research suggestions are also commented. Results show that SO4•–-based AOTs possess good development potential in gaseous pollutant control field due to simple reagent transportation and storage, low product post-treatment requirements and strong degradation ability of refractory pollutants. Each SO4•–-based AOT possesses its own advantages and disadvantages in terms of removal performance, cost, reliability, and product post-treatment. Low free radical yield, poor removal capacity, unclear removal mechanism/contribution of active species, unreliable technology and high cost are still the main problems in this field. The combined use of multiactivation technologies is one of the promising strategies to overcome these defects since it may make up for the shortcomings of independent technology. In order to improve free radical yield and pollutant removal capacity, enhancement of mass transfer and optimization design of reactor are critical issues. Comprehensive consideration of catalytic materials, removal chemistry, mass transfer and reactor is the promising route to solve these problems. In order to clarify removal mechanism, it is essential to select suitable free radical sacrificial agents, probes and spin trapping agents, which possess high selectivity for target specie, high solubility in water, and little effect on activity of catalyst itself and mass transfer/diffusion parameters. In order to further reduce investment and operating costs, it is necessary to carry out the related studies on simultaneous removal of more gaseous pollutants.

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“…As an oxidant with a high water content (the moisture content of industrial grade H 2 O 2 is up to 72.5%), H 2 O 2 has several disadvantages in the large-scale transportation/storage and liquid products concentration by heating after the reaction. Some researchers − used solid peroxides such as potassium peroxymonosulfate (or oxone), persulfate, and urea peroxide, which are easier to transport/store and concentrate the product, to remove pollutants such as SO 2 , NO, Hg 0 , and As 2 O 3 . Adewuyi et al .…”

Section: Peroxide Oxidationmentioning

confidence: 99%

Review on Removal of SO₂, NO_x, Mercury, and Arsenic from Flue Gas Using Green Oxidation Absorption Technology

Wang

Liu

2021

Energy Fuels

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Emission of SO2, NO x , mercury (Hg), and arsenic (As) from flue gas has become a great public concern due to their hazards for human health and ecosystems. Simultaneous removal of multipollutants (two or more of SO2, NO x , Hg, and As) has good development prospects due to its simple system and low cost. Although many multipollutant simultaneous removal technologies have been developed, green oxidation absorption is one of the most promising technologies because it can not only make full use of the existing WFGD devices, but also its treatment process is clean. This review analyzes the latest research advances in the removal of SO2, NO x , Hg, and As from flue gas using green oxidation absorption technologies. The performance, mechanism, and kinetics of SO2, NO x , Hg, and As removal are reviewed. The merits and drawbacks of these green oxidation absorption technologies and the potential research directions are commented on. This review indicates that each technology has its own advantages and disadvantages in terms of removal efficiency, cost, reliability, and product post-treatment. Photochemical and electrochemical removal technologies have a high free radical yield and pollutant removal efficiency, but they have complex systems, high energy consumption, or unreliable systems. Metal oxide-activated peroxide oxidation technology has a good prospect due to its simple process, low device requirements, and recyclability of catalysts. However, it also has shortcomings such as a low free radical yield and easy deactivation of catalysts. Other technologies also have some disadvantages, such as high cost, low free radical yield, difficult separation of products, complex equipment, and/or low reliability. Synergic use of multitechnologies may be a promising strategy because it can make up for the shortcomings of each technology.

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Fenton-based technologies as efficient advanced oxidation processes for microcystin-LR degradation

Cited by 65 publications

References 120 publications

Austenitic Stainless Steel as a Catalyst Material for Photo-Fenton Degradation of Organic Dyes

Austenitic Stainless Steel as a Catalyst Material for Photo-Fenton Degradation of Organic Dyes

A Critical Review on Removal of Gaseous Pollutants Using Sulfate Radical-based Advanced Oxidation Technologies

Review on Removal of SO₂, NO_x, Mercury, and Arsenic from Flue Gas Using Green Oxidation Absorption Technology

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Fenton-based technologies as efficient advanced oxidation processes for microcystin-LR degradation

Cited by 65 publications

References 120 publications

Austenitic Stainless Steel as a Catalyst Material for Photo-Fenton Degradation of Organic Dyes

Austenitic Stainless Steel as a Catalyst Material for Photo-Fenton Degradation of Organic Dyes

A Critical Review on Removal of Gaseous Pollutants Using Sulfate Radical-based Advanced Oxidation Technologies

Review on Removal of SO2, NOx, Mercury, and Arsenic from Flue Gas Using Green Oxidation Absorption Technology

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Product

Resources

About

Review on Removal of SO₂, NO_x, Mercury, and Arsenic from Flue Gas Using Green Oxidation Absorption Technology