Photocatalytic Degradation of Emerging Contaminants: Artificial Sweeteners

Zelinski, Danielle Wisniewski; Santos, Tâmisa Pires Machado dos; Takashina, Thiago Atsushi; Leifeld, Vanessa; Igarashi‐Mafra, Luciana

doi:10.1007/s11270-018-3856-4

Cited by 10 publications

(4 citation statements)

References 55 publications

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“…[54][55][56] When modeling photocatalytic processes, two main factors need to be considered: (i) the light absorption on the catalyst ChemElectroChem and (ii) the concentration of pollutants. For many laboratory and pilot scale applications, the rate of consumption of pollutants have been described according to a Langmuir-Hinshelwood model, [57][58][59] other researchers formulate their models under specific assumptions regarding the adsorption kinetics, light absorption, and controlling reactions within the mechanism. [60][61][62] The fact whether the catalyst is supported or suspended in solution may involve additional considerations within the model; i. e., the study of the radiation field within the photoreactors depends whether the catalyst is suspended in the solution or supported.…”

Section: Photocatalysismentioning

confidence: 99%

“…When modeling photocatalytic processes, two main factors need to be considered: (i) the light absorption on the catalyst and (ii) the concentration of pollutants. For many laboratory and pilot scale applications, the rate of consumption of pollutants have been described according to a Langmuir‐Hinshelwood model, [57–59] other researchers formulate their models under specific assumptions regarding the adsorption kinetics, light absorption, and controlling reactions within the mechanism [60–62] …”

Section: Introductionmentioning

confidence: 99%

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Analysis of the Applications of Particle Swarm Optimization and Genetic Algorithms on Reaction Kinetics: A Prospective Study for Advanced Oxidation Processes

et al. 2022

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A bibliometric analysis of the Scopus database was implemented to assess the spread of two types of evolutionary algorithms (EAs), genetic algorithms (GA) and particle swarm optimization (PSO), on the study of reaction kinetics. Particular attention was given to applications for advanced oxidation processes (AOPs). The collaborations between countries and authors, as well as the keywords co‐occurrences, were investigated. Finally, the Gompertz and Logistic Substitution models (LSM) were employed to forecast future scenarios. It was observed that GA methods were the preferred algorithms for reaction kinetic studies, and the USA was the most influential country in terms of collaboration, followed by China. On the other hand, there was still poor collaboration for most countries; this was also observed for authors’ collaboration. In addition, literature concerning AOPs was still scarce. The forecasting suggested growth for implementing evolutionary algorithms, especially for the PSO, increasing its popularity regarding GA methods.

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Section: Photocatalysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Analysis of the Applications of Particle Swarm Optimization and Genetic Algorithms on Reaction Kinetics: A Prospective Study for Advanced Oxidation Processes

et al. 2022

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“…Several studies have looked at how acesulfame and other artificial sweeteners might be better removed from waste water influent. For example, Zelinski et al (2018) reported a study that looked at the effects of a range of variables on the photocatalysis (TiO2)/UV-A) of acesulfame in an aqueous solution. The research showed that after 60 minutes acesulfame-K had degraded by more than 99% with a maximum mineralization of 57%.…”

Section: Environmental Fatementioning

confidence: 99%

Review and synthesis of data on the potential environmental impact of artificial sweeteners

Lewis

Tzilivakis

2021

EFSA Supporting Publications

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EFSA is implementing evidence-based risk assessments for the re-evaluation of certain sweeteners. The aim of this work was to ensure that, as part of the preparatory work done by EFSA to support its Panel on Food Additives and Flavourings (FAF) in reaching conclusions on the safety of permitted food additives, relevant information on the environmental risks associated with the use of the artificial sweeteners are identified. In the context of this re-evaluation process the following substances used as sweeteners were considered: acesulfame-K (E 950), salt of aspartame-acesulfame (E 962), sucralose (E 955), saccharins (E 954), thaumatin (E 957), neohesperidine DC (E 959), neotame (E 961), cyclamates (E 952) and the polyol sweeteners (sorbitols (E 420); mannitol (E 421); isomalt (E 953); maltitols (E 965); lactitol (E 966); xylitol (E 967) and erythritol (E 968)). Data was collated using a systematic review approach. Generally, the data identified was extremely limited particularly with respect to neohesperidine DC, neotame, thaumatin and the polyol sweeteners. However, there was also limited evidence to suggest their widespread occurrence in the environment. With respect to acesulfame-K, sucralose, cyclamates and saccharin multiple studies were identified that demonstrate the widespread distribution of these sweeteners in surface waters, groundwaters, coastal and marine waters. There are also studies showing their presence in drinking (tap) water supplies, rainwater and in atmospheric samples. However, these sweeteners do not appear to be highly toxic to aquatic species, at least not at environmental concentrations currently seen. The salt of aspartame-acesulfame easily dissociates into its two component sweeteners in the human body and the environment and so the review process also considered aspartame despite it not being a specific focus of the regulatory review process. Whilst there is some evidence to suggest aspartame is toxic to aquatic species it is not detected at levels of concern in the environment.

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“…Li et al (2016) investigated the photocatalytic transformation of ACE‐K and the embryotoxicity of the TPs to zebrafish while Ren et al (2016) studied oxidative stress markers in carp and found elevated levels following UV irradiation of ACE‐K. In contrast to these studies, a recent investigation used brine shrimp ( Artemia salina ) to examine the potential toxicity of ACE‐K TPs following photocatalysis (TiO 2 /UV‐A) for 60 min (Zelinski et al 2018). The EC50 values for both the parent ACE‐K and its TPs was >1000 mg/L, and these authors concluded that the formation of toxic ACE‐K TPs following photocatalysis probably does not occur.…”

Section: Risk Characterizationmentioning

confidence: 99%

A Review of the Environmental Fate and Effects of Acesulfame‐Potassium

Belton¹,

Schaefer

Guiney³

2020

Integr Envir Assess & Manag

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The use of low and no calorie sweeteners (LNCSs) has increased substantially the past several decades. Their high solubility in water, low absorption to soils, and reliable analytical methods facilitate their detection in wastewater and surface waters. Low and no calorie sweeteners are widely used in food and beverage products around the world, have been approved as food additives, and are considered safe for human consumption by the United States Food and Drug Administration (USFDA) and other regulatory authorities. Concerns have been raised, however, regarding their growing presence and potential aquatic toxicity. Recent studies have provided new empirical environmental monitoring, environmental fate, and ecotoxicity on acesulfame potassium (ACE‐K). Acesulfame potassium is an important high‐production LNCS, widely detected in the environment and generally reported to be environmentally persistent. Acesulfame‐potassium was selected for this environmental fate and effects review to determine its comparative risk to aquatic organisms. The biodegradation of ACE‐K is predicted to be low, based on available quantitative structure–activity relationship (QSAR) models, and this has been confirmed by several investigations, mostly published prior to 2014. More recently, there appears to be an interesting paradigm shift with several reports of the enhanced ability of wastewater treatment plants to biodegrade ACE‐K. Some studies report that ACE‐K can be photodegraded into potentially toxic breakdown products, whereas other data indicate that this may not be the case. A robust set of acute and chronic ecotoxicity studies in fish, invertebrates, and freshwater plants provided critical data on ACE‐K's aquatic toxicity. Acesulfame‐potassium concentrations in wastewater and surface water are generally in the lower parts per billion (ppb) range, whereas concentrations in sludge and groundwater are much lower (parts per trillion [ppt]). This preliminary environmental risk assessment establishes that ACE‐K has high margins of safety (MOSs) and presents a negligible risk to the aquatic environment based on a collation of extensive ACE‐K environmental monitoring, conservative predicted environmental concentration (PEC) and predicted no‐effect concentration (PNEC) estimates, and prudent probabilistic exposure modeling. Integr Environ Assess Manag 2020;16:421–437. © 2020 The Authors. Integrated Environmental Assessment and Management published by Wiley Periodicals, Inc. on behalf of Society of Environmental Toxicology & Chemistry (SETAC)

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Photocatalytic Degradation of Emerging Contaminants: Artificial Sweeteners

Cited by 10 publications

References 55 publications

Analysis of the Applications of Particle Swarm Optimization and Genetic Algorithms on Reaction Kinetics: A Prospective Study for Advanced Oxidation Processes

Analysis of the Applications of Particle Swarm Optimization and Genetic Algorithms on Reaction Kinetics: A Prospective Study for Advanced Oxidation Processes

Review and synthesis of data on the potential environmental impact of artificial sweeteners

A Review of the Environmental Fate and Effects of Acesulfame‐Potassium

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