Techno-economic evaluation of UV light technologies in water remediation

Pelayo, Deva; Rivero, M; Santos, Germán; Gómez, Pedro C.; Ortíz, Inmaculada

doi:10.1016/j.scitotenv.2022.161376

Cited by 14 publications

(4 citation statements)

References 70 publications

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“…The initial concentration of pollutant 3–30 mg/L, pH 3, to 10 in both wastewater and ultrapure water conditions were studied. UV-C photolysis and UV-C photocatalysis were found to be most efficient in terms of removal, due to a low carbon footprint, and cost effectiveness due to less electrical energy consumption Figures and elucidate the mechanism of electrocatalysis and photoelectrocatalysis, respectively, in wastewater treatment.…”

Section: Technologies Involved In Treatment Of Pharmaceutical Wastewatermentioning

confidence: 99%

Pharmaceutical Wastewater Remediation: A Review of Treatment Techniques

Date,

Jaspal

2023

Ind. Eng. Chem. Res.

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Section: Technologies Involved In Treatment Of Pharmaceutical Wastewatermentioning

confidence: 99%

Pharmaceutical Wastewater Remediation: A Review of Treatment Techniques

Date,

Jaspal

2023

Ind. Eng. Chem. Res.

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“…For instance, deamination of ethylamine may require 324 KJ mol -1 , which is equivalent to energy emitted at a threshold wavelength of 370 nm. Therefore, energy higher than the bond energy increases the chance of breakage, even if the matrix is somewhat different (Pelayo et al, 2023).…”

Section: Uv Emission and Mechanism Of Compound Degradationmentioning

confidence: 99%

“…Furthermore, most UV lamps have a lifetime ranging from 8000 to 2000 h, giving rise to concerns about toxic waste if a mercury lamp is used (Pelayo et al, 2023). While this thesis investigated degradation of OMPs and inactivation of urease using low-pressure mercury lamps, the underlying mechanism for system effectiveness was UVC light and the inherent radicals formed during treatment, i.e.…”

Section: Implementation Challengesmentioning

confidence: 99%

UV-based advanced oxidation process for nutrient stabilisation and organic micropollutant degradation in source-separated human urine

Demissie

2023

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Urine dehydration is one of the technological approach to recover nutrients in concentrated form from source separated urine. When drying fresh urine, nitrogen loss occurs due to hydrolysis of urea into ammonia unless methods to inactivate urease enzyme are employed. In addition, concerns arise when using urine-derived fertiliser due to the potential presence of organic micropollutants (pharmaceuticals). This thesis evaluated ultraviolet (UV) treatment as an alternative chemical-free nutrient stabilisation (urease inactivation) and organic micropollutant (OMP) degradation technology. Urease inactivation and OMP degradation in water and in urine (synthetic urine, real urine from human subjects) were studied in a photoreactor equipped with a low-pressure mercury UV lamp emitting light predominantly at 185 and 254 nm. Exposure of real urine to 80 min of UV irradiation resulted in more than 90% degradation of 18 out of 75 OMPs and 1-90% degradation of the remaining OMPs. Enzymatic activity fell below the detection limit for real urine exposed to 71 min of UV irradiation. However, electrical energy demand for reducing enzymatic activity below the detection limit in real fresh urine was 52-fold higher than for inactivation in synthetic fresh urine (without urea), while electrical energy demand was more than 10-fold higher for 90% OMP degradation in real fresh urine than in water. The inactivation and OMP degradation observed were probably due to direct photolysis and photo-oxidation. Presence of organic substances in real urine was the likely reason for less efficient inactivation of urease and OMP degradation, as such substances can competitively absorb incoming UV light and scavenge the free radicals formed during UV treatment. Although 20% urea was lost after UV treatment, there was no decrease in total nitrogen. In summary, UV treatment can stabilise urea-N and degrade OMPs in fresh urine and has potential for integration into urine diversion sanitation systems.

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“…Common advanced oxidation processes based on UV radiation, such as UV/H 2 O 2 combinations, are known to be effective for the degradation and mineralization of resistant pollutants due to the generation of reactive hydroxyl radi-cals that react with most organic compounds [11]. The use of solar radiation could solve economic and environmental problems, such as the frequent replacement of light bulbs, mercury toxicity, and the shortened lifespan with each lamp cycle [26].…”

Section: Introductionmentioning

confidence: 99%

Use of Simulated Sunlight Radiation and Hydrogen Peroxide to Remove Xenobiotics from Aqueous Solutions

Babić Visković,

Maslač,

Dolar

et al. 2023

Processes

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Xenobiotics, which include a wide range of synthetic chemicals and compounds, have become a significant threat to water quality and biodiversity. The need for innovative and sustainable solutions to mitigate the impact of pollutants on our ecosystems has become a hot topic of numerous discussions and research. One such solution lies in the potential application of simulated solar radiation and hydrogen peroxide to remove pesticides from aqueous solutions. In this paper, we investigated the possibility of removing selected pesticides (acetamiprid, clothianidin, and thiacloprid) under the influence of simulated solar radiation with and without the presence of hydrogen peroxide (H2O2). The influence of pH value and H2O2 concentration on removal and toxicity before and after photolytic removal was examined. The results showed that clothianidin is almost completely removed (94.80–96.35%) after 5 h under the influence of simulated solar radiation, while thiacloprid and acetamiprid confirm their persistence and resistance to photolytic degradation. The addition of H2O2 leads to the removal of all three pesticides and results in a significant acceleration of the degradation process itself and the removal of the individual pesticides already within 2 h. According to the data obtained, the k values obtained in the paper follow the following trend: clothianidin > thiacloprid > acetamiprid.

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Techno-economic evaluation of UV light technologies in water remediation

Cited by 14 publications

References 70 publications

Pharmaceutical Wastewater Remediation: A Review of Treatment Techniques

Pharmaceutical Wastewater Remediation: A Review of Treatment Techniques

UV-based advanced oxidation process for nutrient stabilisation and organic micropollutant degradation in source-separated human urine

Use of Simulated Sunlight Radiation and Hydrogen Peroxide to Remove Xenobiotics from Aqueous Solutions

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