Related references
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Summary: In recent decades, UV-AOPs have been used to remove various contaminants from polluted water, but their industrial-scale application is limited by high operational costs. Researchers have been working on increasing their efficiency and reducing costs by optimizing operational parameters, developing photocatalytic materials, and combining different UV-AOPs for pollutant treatment.
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Summary: Sulfate radical advanced oxidation processes (SR-AOP) have been successfully utilized for the degradation of antibiotics in water and wastewater treatment. This review discusses the mechanisms and applications of SR-AOPs in antibiotics degradation. The progress in this field, including the most promising developments and remaining challenges, is highlighted. The most susceptible and persistent oxidation groups of pharmaceuticals are summarized, and the highest effectiveness is reported for degradation of pharmaceuticals at ppb level. A scavenging effect is observed when the oxidant dose is 0.7 mM for the persulfate (PS) and 2 mM for the peroxymonosulfate (PMS). Future development requires simple persulfate activation systems for real matrix treatment.
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S. Guerra-Rodriguez et al.
Summary: This research explores the application of advanced oxidation processes (AOPs) for wastewater reclamation at pilot scale, which has been a major limitation in this field. Pilot-scale studies on sulfate radical-based AOPs (SR-AOPs) are rare, although there has been an increasing interest in them in recent years. The activation of peroxymonosulfate (PMS) can be enhanced by UV-A radiation or other oxidants like hydrogen peroxide (H2O2) or ozone (O3), leading to more efficient processes with lower reagent consumption. The combination of 0.5 mM PMS and 0.25 g·h-1 O3 showed the fastest inactivation of Enterococcus faecalis, achieving complete inactivation in less than 45 minutes. The combination of PMS, H2O2, and UV-A radiation also exhibited significant synergy to achieve total inactivation in less than 120 minutes, albeit with lower performance than the PMS/O3 system. Mechanistic studies revealed that the sulfate radical (SO4-) was responsible for bacterial inactivation in the PMS/O3 system, while the dominant species varied in the PMS/H2O2/UV-A system depending on the molar ratio of the oxidants. The treatments studied were effective in simultaneously eliminating pathogenic microorganisms such as Enterococcus faecalis, Escherichia coli, and Staphylococcus aureus, making this technology a viable alternative to conventional disinfection treatments.
CHEMICAL ENGINEERING JOURNAL
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Zhi Fang et al.
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JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
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Engineering, Environmental
Hao Sun et al.
Summary: A biochar composite loaded with nZVI particles and MoS2 nanosheets (nZVI/MoS2-BC) was prepared and used for efficient activation of peroxymonosulfate (PMS) to degrade refractory organics. The interaction between nZVI and MoS2 increased the reaction sites and improved the dispersing of nZVI on the biochar surface. PMS activated by nZVI/MoS2-BC produced reactive oxygen species (ROSs) to degrade pollutants. The increased specific surface area and electrical conductivity facilitated the electron transfer and enhanced the pollutant degradation.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
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Christine Roth et al.
Summary: This study compares the environmental impacts of two different drinking water treatment scenarios (AOP and LPRO) using a life cycle assessment method. The results show that under the condition of electricity provided by renewable energy sources, the LPRO-based treatment has lower environmental impacts compared to the AOP-based treatment. Electricity and chemical agents used in the treatment process are the main contributors to the environmental impacts. However, further research is needed for the evaluation of treatment benefits.
JOURNAL OF CLEANER PRODUCTION
(2022)
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Eva Risch et al.
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SCIENCE OF THE TOTAL ENVIRONMENT
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Engineering, Environmental
Hawzhin Amanollahi et al.
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Sonia Guerra-Rodriguez et al.
Summary: The study showed that the simultaneous degradation of multiple classes of MPs in secondary treated wastewater using UV-A radiation activated PMS without pH adjustment or iron addition is effective. Synergies between radiation and the oxidant were demonstrated, with an average extent of synergy of 69.1%, making the treatment efficient in reducing toxicity for water reuse.
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Adeola Julian Sorinolu et al.
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