Ozonation effect on natural organic matter adsorption and biodegradation – Application to a membrane bioreactor containing activated carbon for drinking water production

Treguer, Ronan; Tatin, Romuald; Couvert, Annabelle; Wolbert, Dominique; Tazi‐Pain, A.

doi:10.1016/j.watres.2009.10.023

Cited by 89 publications

(35 citation statements)

References 14 publications

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“…This suggests that aromatic moieties within DOM can be a major portion of the removed DOM constituents in the ozone process. Our results were consistent with many prior studies reporting that, instead of complete mineralization, ozone preferentially reacts with double-bond and aromatic structures, ultimately leading to decomposing HMW molecules into smaller sized fractions (Black and Bérubé 2014;Treguer et al 2010).…”

Section: Ozonationsupporting

confidence: 93%

Tracking the behavior of different size fractions of dissolved organic matter in a full-scale advanced drinking water treatment plant

Quang

Choi²,

Hur

2015

Environ Sci Pollut Res

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In this study, five different dissolved organic matter (DOM) fractions, defined based on a size exclusion chromatography with simultaneous detection of organic carbon (OCD) and ultraviolet (UVD), were quantitatively tracked with a treatment train of coagulation/flocculation-sand filtration-ozonation-granular activated carbon (GAC) filtration in a full-scale advanced drinking water treatment plant (DWTP). Five DOM samples including raw water were taken after each treatment process in the DWTP every month over the period of three years. A higher abundance of biopolymer (BP) fraction was found in the raw water during spring and winter than in the other seasons, suggesting an influence of algal bloom and/or meltwater on DOM composition. The greater extent of removal was observed upon the coagulation/flocculation for high-molecular-weight fractions including BP and humic substances (HS) and aromatic moieties, while lower sized fractions were preferentially removed by the GAC filtration. Ozone treatment produced the fraction of low-molecular-weight neutrals probably resulting from the breakdown of double-bonded carbon structures by ozone oxidation. Coagulation/flocculation was the only process that revealed significant effects of influent DOM composition on the treatment efficiency, as revealed by a high correlation between the DOM removal rate and the relative abundance of HS for the raw water. Our study demonstrated that SEC-OCD-UVD was successful in monitoring size-based DOM composition for the advanced DWTP, providing an insight into optimizing the treatment options and the operational conditions for the removal of particular fractions within the bulk DOM.

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Section: Ozonationsupporting

confidence: 93%

Tracking the behavior of different size fractions of dissolved organic matter in a full-scale advanced drinking water treatment plant

Quang

Choi²,

Hur

2015

Environ Sci Pollut Res

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“…Ozonation of dissolved organic matter results in its disintegration leading to lower molecule sizes. As ozone preferably oxidizes electron-rich areas (aromatic p-delocalized systems) in target molecules, it can also reduce the aromaticity of the oxidized compounds (Treguer et al, 2010). It is also known that dissolved organics are less adsorbable onto activated carbon after ozonation (Matsui et al, 1999).…”

Section: Introductionmentioning

confidence: 99%

Impacts of ozonation on the competition between organic micro-pollutants and effluent organic matter in powdered activated carbon adsorption

2015

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“…Indeed, a study by Treguer et al [26] also found that low molecular weight molecules were preferentially removed by GAC treatment; a characteristic attributable to the fact that smaller molecules are better able to diffuse further into the pores of adsorbent material in comparison with larger molecules. The implication of the findings from the other studies [25,26] is that GAC is likely to be relatively ineffective at removing the large (humic) molecules traditionally associated with metal complexation; a result supported by both the complexation capacity and SUVA results from the present study. In combination, these suggest that GAC treatment is unlikely to significantly impact copper or zinc bioavailability in effluent discharges.…”

Section: The Relationship Between Copper and Zinc Complexation And Suvamentioning

confidence: 99%

“…The treatment technologies evaluated in this study are not commonly used to treat sewage effluent, however, in the context of drinking water treatment, GAC is often applied as a treatment following other more destructive treatment options such as ozonation in order to remove treatment by-products such as aldehydes, carboxylic acids and other low molecular weight biodegradable organic compounds such as pesticides [25]. Indeed, a study by Treguer et al [26] also found that low molecular weight molecules were preferentially removed by GAC treatment; a characteristic attributable to the fact that smaller molecules are better able to diffuse further into the pores of adsorbent material in comparison with larger molecules. The implication of the findings from the other studies [25,26] is that GAC is likely to be relatively ineffective at removing the large (humic) molecules traditionally associated with metal complexation; a result supported by both the complexation capacity and SUVA results from the present study.…”

Section: The Relationship Between Copper and Zinc Complexation And Suvamentioning

confidence: 99%

The impact of tertiary wastewater treatment on copper and zinc complexation

Constantino

Gardner

Comber

et al. 2015

Environmental Technology

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Tightening quality standards for European waters have seen a move towards enhanced wastewater treatment technologies such as granulated organic carbon treatment and ozonation.Although these technologies are likely to be successful in degrading certain micro-organic contaminants these may also destroy compounds which would otherwise complex and render metals significantly less toxic. This study examined the impact of enhanced tertiary treatment on the capacity of organic compounds within sewage effluents to complex copper and zinc. The data show that granulated organic carbon treatment removes a dissolved organic carbon (DOC) fraction that is unimportant to complexation such that no detrimental impact on complexation or metal bioavailability is likely to occur from this treatment type. High concentrations of ozone (>1mg O 3 /mg DOC) are, however, likely to impact the complexation capacity for copper although this is unlikely to be important at the concentrations of copper typically found in effluent discharges or in rivers. Ozone treatment did not affect zinc complexation capacity. The complexation profiles of the sewage effluents show these to contain a category of non-humic ligand that appears unaffected by tertiary treatment and which displays a high affinity for zinc, suggesting these may substantially reduce the bioavailability of zinc in effluent discharges. The implication is that traditional metal bioavailability assessment approaches such as the Biotic Ligand Model may overestimate zinc bioavailability in sewage effluents and effluent impacted waters.

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Ozonation effect on natural organic matter adsorption and biodegradation – Application to a membrane bioreactor containing activated carbon for drinking water production

Cited by 89 publications

References 14 publications

Tracking the behavior of different size fractions of dissolved organic matter in a full-scale advanced drinking water treatment plant

Tracking the behavior of different size fractions of dissolved organic matter in a full-scale advanced drinking water treatment plant

Impacts of ozonation on the competition between organic micro-pollutants and effluent organic matter in powdered activated carbon adsorption

The impact of tertiary wastewater treatment on copper and zinc complexation

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