Approaches to Water and Wastewater Treatment for Removal of Emerging Contaminants: Ongoing Research and Recommendations for Future Work

Malato, Sixto; Fernández‐Ibáñez, Pilar; Oller, Isabel; Prieto-Rodríguez, L.; Miralles-Cuevas, S.; Cabrera‐Reina, Alejandro

doi:10.1002/9781118339558.ch05

Cited by 2 publications

(2 citation statements)

References 74 publications

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“…As most of the works dedicated to the degradation of paracetamol by AOPs used concentration levels as high as 1 mmol L −1 , the initial pollutant concentration was set to 100 ppm for comparison purpose. Moreover, for very diluted effluents, AOPs would probably be better used downstream a pre‐concentration step so as to treat smaller streams, limit radical scavenging and save chemicals . This also allows both the liquid and the solid phases to be analyzed with enough precision to determine the fate of the pollutant during the batch oxidation.…”

Section: Introductionmentioning

confidence: 99%

Heterogeneous fenton and photo‐fenton oxidation for paracetamol removal using iron containing ZSM‐5 zeolite as catalyst

et al. 2016

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Paracetamol is commonly found in wastewaters, as a consequence of its high consumption and incomplete elimination by conventional treatments. Homogenous (photo‐)Fenton oxidation has proved efficient for its remediation, but it suffers from uneasy dissolved iron recovery. Therefore this work examines the performance and stability of an iron containing zeolite (Fe/MFI) as catalyst for this reaction. Effects of reaction parameters (pH, temperature, catalyst and H2O2 concentrations, UV/vis irradiation) are investigated in batch conditions, by comparing the pollutant and Total Organic Carbon disappearance rates in solution, as well as the overall mineralization yield (including solid phase) and oxidant consumption. At near neutral pH paracetamol can be fully converted after 5 h, while TOC removal reaches up to 60%. Finally, thanks to good catalyst stability (low leaching), a continuous process coupling oxidation and membrane filtration is proposed, showing constant TOC conversion over 40 h and iron loss in the permeate <0.3 ppm. © 2016 American Institute of Chemical Engineers AIChE J, 63: 669–679, 2017

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Section: Introductionmentioning

confidence: 99%

Heterogeneous fenton and photo‐fenton oxidation for paracetamol removal using iron containing ZSM‐5 zeolite as catalyst

et al. 2016

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“…Main degradation processes are hydrolysis, oxidation and chlorination among others (Duirk et al., 2009 ; Chamberlain et al., 2010 ). Scientific literature shows that these processes can lead to the formation of a variety of disinfection products (Brix et al., 2009 ; Quintana et al., 2014 ; Malato et al., 2014 ). Many of these are unknown compounds, and their rate of degradation may vary considerably (Sandín‐España et al., 2005 ; Lerch et al., 2007 ; Vanderford et al., 2008 ).…”

Section: Introductionmentioning

confidence: 99%

Impact of drinking water treatment processes on the residues of plant protection products for consumer and aquatic risk assessment: theoretical and experimental studies

Mari

Alonso‐Prados

Villaverde

et al. 2022

EFS2

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Pesticides residues can occur in ground and surface waters, and potentially react with chemicals used for water disinfection treatments, such as chlorine. This can lead to the formation of unknown reaction products, which can be more toxic and/or persistent than the active substances themselves, and therefore become a potential risk for human health and environment. Thus, in the framework of the EU Regulation 1107/2009, the identification of these by‐products and their potential risk should be assessed. Within the European Food Risk Assessment (EU‐FORA) Fellowship Programme, the fellow studied the behaviour of herbicides belonging to the families of imidazolinones and sulfonylureas in waters treated with chlorine disinfectants. Due to their physicochemical properties, these herbicides are susceptible of reaching natural waters. In fact, some of them have been detected in water monitoring programmes. During the experimental part of the present work programme, reactions between the active substances and the most used chlorine disinfecting reactants (hypochlorite and chloramines) were performed. Degradation kinetic parameters such as half‐lives and degradation constants were calculated. Results showed that herbicide degradation was both pH and chlorine/chloramines concentration dependent. In order to identify the degradation by‐products, high‐resolution mass spectrometry experiments were performed, and a possible route of formation of these compounds was proposed. Finally, their risk assessment was carried out by using tox/ecotoxicological properties determined by QSAR methodology and FOCUS modelling for hazard and exposure assessment, respectively. These results will contribute to the definition of a risk assessment scheme for pesticides by‐products potentially occurring in drinking water.

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Approaches to Water and Wastewater Treatment for Removal of Emerging Contaminants: Ongoing Research and Recommendations for Future Work

Cited by 2 publications

References 74 publications

Heterogeneous fenton and photo‐fenton oxidation for paracetamol removal using iron containing ZSM‐5 zeolite as catalyst

Heterogeneous fenton and photo‐fenton oxidation for paracetamol removal using iron containing ZSM‐5 zeolite as catalyst

Impact of drinking water treatment processes on the residues of plant protection products for consumer and aquatic risk assessment: theoretical and experimental studies

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