What happens with organic micropollutants during UV disinfection in WWTPs? A global perspective from laboratory to full-scale

Paredes, Lidia; Omil, F.; Lema, Juan M.; Carballa, Marta

doi:10.1016/j.jhazmat.2017.08.075

Cited by 33 publications

(11 citation statements)

References 46 publications

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“…Bioassays were the main focus of this paper, while two previous papers ( [9] and [10] that act as accompanying papers) were entirely devoted to the chemical analysis results, specifically explaining the behaviour of OMPs in the three studied post-treatment systems and their different removal mechanisms.…”

Section: Resultsmentioning

confidence: 99%

“…As extensively reported in [10], the reason lies in the different photosensitivity of target OMPs, whose removal efficiencies are very closely related to. Moreover, it is well known [18] that UV treatment is not able to reach the complete mineralization of pollutants, but only to reduce their complexity owing to the rupture of bonds by UV light action.…”

Section: Uv Systemsmentioning

confidence: 89%

“…Similarly to biofilters, a secondary effluent (main characteristics: pH: 7.3, COD: 24 mg/L, N-NH 4 : 1.3 mg/L, NO 3 : 3.6 mg/L and turbidity: 4.7 NTU) spiked with selected OMPs was used (full details in Table S1 of Supplementary Materials). The detailed description of UV reactor operation can be found in [10]: again, among a wider spectrum of operating conditions where OMPs were detected, the effect-based assays were carried out under an UV dose of 1,200 mJ/cm 2 . For this experiment, OMPs were determined on duplicate whereas bioassays were executed on triplicate for estrogenicity and on duplicate for mutagenicity.…”

Section: Uv Systemmentioning

confidence: 99%

“…For their determination, 250 mL influent and effluent samples were prefiltered (0.70 μm, Millipore) and pre-concentrated by solid phase extraction (SPE) prior to analysis with Gas Chromatography Mass Spectrometry -GC/MS (pain killers, musk fragrances and EDCs) and Liquid Chromatography Tandem Mass Spectrometry -LC/MS/MS (antibiotics, estrogens and psychoactive drugs). Further details on the limits of detection, quantification and recoveries of analytical methods are described in [9] and [10].…”

Section: Organic Micropollutantsmentioning

confidence: 99%

See 3 more Smart Citations

How should ecohazard of micropollutants in wastewater be gauged? Using bioassays to profile alternative tertiary treatments

Papa

Paredes

Feretti

et al. 2020

Environmental Engineering Research

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The research on emerging pollutants in wastewater has become a worldwide issue of increasing environmental concern, especially considering the growing interest in wastewater reuse. However, the latter implies additional post-treatment after the conventional activated sludge processes, in order to produce a safer effluent. Our work aimed at determining the efficiency of reducing the toxicity associated with organic micropollutants (OMPs) in secondary wastewater effluents, using 3 different post-treatment technologies (granular activated carbon (GAC), sand biofiltration and UV irradiation): in particular, target chemical analysis of the OMPs most commonly founded in wastewater was coupled with effect-based assays (estrogenicity and mutagenicity). While chemical analysis assessed satisfactory performances for all 3 technologies in the abatement of selected OMPs, biological assays evidenced another perspective: both GAC and sand biofilters were significantly able to make the estrogenic load plummet; however, the UV system was ineffective in estrogenicity abatement, and its effluent exhibited also a slight mutagenicity, likely due to photo-transformation by-products. These results indicate that a synergistic combination of chemical analysis and biological assays can drive to a proper gauging of post-treatment technologies, taking into account not only the removal of OMPs, but also their overall toxicity.

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Section: Resultsmentioning

confidence: 99%

Section: Uv Systemsmentioning

confidence: 89%

Section: Uv Systemmentioning

confidence: 99%

Section: Organic Micropollutantsmentioning

confidence: 99%

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How should ecohazard of micropollutants in wastewater be gauged? Using bioassays to profile alternative tertiary treatments

Papa

Paredes

Feretti

et al. 2020

Environmental Engineering Research

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“…Viewing this, direct UV radiation has been one of the most widely studied micropollutant removal techniques, examples are well documented in literature [89][90][91][92]. For instance, in a recent study conducted by a group of Spanish researchers, it has been reported that UV treatment would be capable for the removal of several micropollutants [93]. It was reported that, among 18 tested micropollutants, a lab-scale UV reactor (lamp emitting at 254 nm) enabled effective removal of diclofenac, fluoxetine, sulfamethoxazole, bisphenol A, estrone, 17β-estradiol, and 17αethynylestradiol.…”

Section: Photo-fenton Processesmentioning

confidence: 99%

Micropollutant degradation in water by photochemical processes

Yin¹

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Fast growing global population and economy result in an increasing water consumption worldwide. However, the amounts of usable water resources are limited: more than one-third of the accessible renewable fresh water on Earth is being exploited for industrial, agricultural, as well as domestic usage [1]. Locally, especially in water scarce areas, this is often reaching much higher levels, leading to overdraft of water resources [2]. Such facts call for the need to not only exploit new and alternative water resources but also to recycle water streams, to cope with the unfortunate increasing limitations in availability of fresh water sources. Meanwhile, the fast growing population and economy are leading to serious water pollution due to discharge of numerous contaminants into the environment, which in turn possess sever threats to the quality of water resources. Thus, the increasing worldwide demand for water consumption, the limited amount of water resources, and the water pollution make water treatment a vital measure to safeguard the water supply with sufficient quantity and quality that meets the demand of the society. Conventionally, concerns were given to pathogens, nutrients, heavy metals, suspended solids, and bulk organic pollutants (the amount of bulk organic pollutants generally present in concentrations at 0.1-10 g/l in waste water and often denoted with COD or BOD, meaning chemical or biological oxygen demand). Thus in most parts of the world water purification measures have been taken to tackle these problems [3, 4]. In recent decades, many emerging organic pollutants (generally present at rather low concentrations, i.e. ng/L to µg/L level, and therefore also termed as micropollutants). These include pharmaceuticals, antibiotics, herbicides, pesticides, chemicals from personal care products, etc., and have been detected the last two decades extensively in different water bodies worldwide. For instance, many pharmaceuticals were found in various portions of the aquatic system, i.e. in ground water, surface water, as well as in many drinking water sources according to a broad range of studies [5-11]. In a study conducted by Félix-Cañedo et al. in Mexico City, the presence of a group of organic micropollutants (including pharmaceuticals, hormones, herbicides) in several drinking water sources was reported, at concentrations ranging from ng/L to µg/L level [12]. In recent years, a broad range of micropollutants, including Other investigated homogeneous photochemical processes include UV/Cl2, UV/O3, UV/HOCl, UV/ClO2. Application of these techniques for removal of various micropollutants has been studied over last decades. It is reported that UV/Cl2 could achieve relatively good removal of carbamazepine from wastewater, but formation of toxic chlorinated byproducts was an issue [132, 133]. Kong et al. reported efficient degradation of atrazine by UV/Cl2 [134]. Examples of micropollutant removal by UV/O3, UV/HOCl, UV/ClO2, etc., are also abundant in literature [135-138]. 1.3 Research opportunities 1.3.1 Rese...

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Green Technologies for the Treatment of Pharmaceutical Contaminants in Wastewaters

Pupo

Santos

Torres

et al. 2020

Emerging Eco-Friendly Green Technologies for Wastewater Treatment

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What happens with organic micropollutants during UV disinfection in WWTPs? A global perspective from laboratory to full-scale

Cited by 33 publications

References 46 publications

How should ecohazard of micropollutants in wastewater be gauged? Using bioassays to profile alternative tertiary treatments

How should ecohazard of micropollutants in wastewater be gauged? Using bioassays to profile alternative tertiary treatments

Micropollutant degradation in water by photochemical processes

Green Technologies for the Treatment of Pharmaceutical Contaminants in Wastewaters

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