New Aspects of Occurrence and Removal of Emerging Pollutants

Karpińska, Joanna; Kotowska, Urszula

doi:10.3390/w13172418

Cited by 9 publications

(5 citation statements)

References 12 publications

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“…Micropollutants (MPs), also referred to as emerging contaminants, typically consist of synthetic or natural compounds discharged from various sources, ultimately entering water bodies primarily at trace levels, ranging from a few nanograms per liter (ng/L) to several micrograms per liter (µg/L) [1][2][3]. They encompass primarily pharmaceuticals, personal care products, pesticides, stimulants, persistent organic pollutants, and microand nano-plastics, posing potential adverse effects on living organisms and environmental processes [4,5]. Researchers have predominantly identified wastewater treatment plants (WWTPs) as the primary origin of MPs in aquatic environments [5,6].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Heterogeneous Catalytic Ozonation for Micropollutants Removal from Wastewater: Application of a Pre-Industrial-Scale Unit

Kaprara,

Psaltou,

Salapasidou

et al. 2024

Catalysts

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The present study evaluates the application of heterogeneous catalytic ozonation for the removal of micropollutants from wastewater effluent in a pre-industrial-scale unit, consisting of a post-filtration, an ozone dilution, a catalytic ozonation, and a final biological stabilization step. The important step of ozone dilution is optimized by the use of a hollow fiber membrane that minimizes the loss of ozone gas due to the transfer of ozone to the liquid phase mainly by diffusion. It is observed that the efficiency of this sub-system is maximized for the dead-end operation of the membrane and the introduction of ozone gas to the shell side and liquid phase to the lumen side of the membrane module. Under these conditions, the concentration of dissolved ozone is directly dependent on the ratio of ozone gas feed to the wastewater flow subjected to post-treatment. Regarding the removal of MPs, part of their degradation already takes place at this stage (i.e., during ozone dilution), while after the post-treatment of wastewater effluent in the catalytic ozonation bed, the MP degradation yield ranges from 35% up to complete removal, depending on the type and properties of the specific MP. The addition of a final biological filtration bed to the overall treatment unit significantly increased its performance, regarding the removal of MPs, enhancing it by an additional removal rate that can reach up to 30%.

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Section: Introductionmentioning

confidence: 99%

Evaluation of Heterogeneous Catalytic Ozonation for Micropollutants Removal from Wastewater: Application of a Pre-Industrial-Scale Unit

Kaprara,

Psaltou,

Salapasidou

et al. 2024

Catalysts

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“…Due to advantages offered by these products in everyday life, many of them are employed and released continuously into the environment, even at very low concentrations, and some can cause chronic toxicity, endocrine disruption in humans and aquatic organisms, and the development of antibiotic resistant bacteria. It is therefore necessary to mobilize efforts to protect human health and biodiversity (Patle et al 2020;Hube and Wu 2021;Karpińska and Kotowska 2021).…”

Section: Introductionmentioning

confidence: 99%

Removal of emerging contaminants from wastewater using advanced treatments. A review

et al. 2022

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The rise of emerging contaminants in waters challenges the scientific community and water treatment stakeholders to design remediation techniques that are simple, practical, inexpensive, effective, and environmentally friendly. Emerging contaminants include antibiotics, hormones, illicit drugs, endocrine disruptors, cosmetics, personal care products, pesticides, surfactants, industrial products, microplastics, nanoparticles, and nanomaterials. Removing those contaminants is not easy because classical wastewater treatment systems are not designed to handle emerging contaminants, and contaminants often occur as traces in complex organo-mineral mixtures. Here, we review advanced treatments for the removal of emerging contaminants in wastewater, with focus on adsorption-oriented processes using non-conventional adsorbents such as cyclo-dextrin polymers, metal-organic frameworks, molecularly imprinted polymers, chitosan, and nanocellulose. We describe biological-based technologies for the degradation and removal of emerging contaminants. Then, we present advanced oxida-tion processes as the most promising strategies because of their simplicity and efficiency.

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Section: Introductionmentioning

confidence: 99%

“…All micropollutants have a potentially negative impact on living organisms and on the course of environmental processes [7]. Endocrine disruption and both carcinogenic and mutagenic effects on animals and humans have been demonstrated for many compounds [7,8]. The risks of continuous environmental exposure and the constant rise of micropollutant presence in water bodies has substantially raised the awareness of the scientific community and water/wastewater treatment stakeholders, emphasizing the need to design novel remediation techniques that are more effective, simpler, relatively inexpensive, and more environmentally friendly [9].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Heterogeneous Catalytic Ozonation Process for the Removal of Micropollutants from Water/Wastewater: Application of a Novel Pilot-Scale Continuous Flow System

Kaprara,

Belesakos,

Kollis

et al. 2023

Catalysts

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The present study evaluates the removal of micropollutants from water/wastewater contaminated sources through the application of a heterogeneous catalytic ozonation process, using a pilot-scale continuous operation unit, composed of a membrane module for the diffusion and effective dilution of ozone into the liquid phase to be treated and a plug flow reactor/continuous stirred tank reactor (PFR/CSTR) contact reactor system in series, where the catalyst is recirculated in dispersion mode. The solid materials tested as catalysts are natural and calcined zeolite, Bayoxide and alumina, whereas the examined micropollutants, used in this case as probe compounds, are p-chlorobenzoic acid (p-CBA), atrazine, benzotriazole and carbamazepine. A high-performance liquid chromatography system was used to determine the removal of micropollutants. In the case of p-CBA, an ozone-resistant compound, the addition of catalyst was found to significantly enhance its degradation rate, leading to >99% removal under the optimum defined conditions, i.e., in terms of catalyst concentration, pH, temperature, and process time. On the other hand, in the case of atrazine, a different ozone-resistant compound, the introduction of examined catalysts in the ozonation process was found to reduce the degradation of micropollutant, when compared with the application of single ozonation, indicating the importance of specific affinity between the pollutant and the solid material used as catalyst. Benzotriazole, a moderately ozone-reactive compound was degraded by more than 95% under all experimental conditions and catalysts tested in the pilot unit, while carbamazepine, a highly ozone-reactive compound, was completely removed even during the first stage of treatment process (i.e., at the membrane contactor). When increasing the pH value (in the range 6–8) and the contact time, the performance of catalytic ozonation process also improved.

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New Aspects of Occurrence and Removal of Emerging Pollutants

Abstract: Emerging pollutants (or contaminants) (EPs) are a wide group of organic and inorganic chemicals present in the environment as a result of human activity [...]

Cited by 9 publications

References 12 publications

Evaluation of Heterogeneous Catalytic Ozonation for Micropollutants Removal from Wastewater: Application of a Pre-Industrial-Scale Unit

Evaluation of Heterogeneous Catalytic Ozonation for Micropollutants Removal from Wastewater: Application of a Pre-Industrial-Scale Unit

Removal of emerging contaminants from wastewater using advanced treatments. A review

Evaluation of Heterogeneous Catalytic Ozonation Process for the Removal of Micropollutants from Water/Wastewater: Application of a Novel Pilot-Scale Continuous Flow System

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