Skip to Main content Skip to Navigation
Journal articles

Fluorescence excitation/emission matrices as a tool to monitor the removal of organic micropollutants from wastewater effluents by adsorption onto activated carbon

Abstract : Monitoring the removal of organic micropollutants (OMPs) in advanced wastewater treatment facilities requires expensive and time-consuming analytical methods that cannot be installed online. Spectroscopic techniques such as fluorescence excitation/emission spectroscopy were demonstrated to offer the potential for monitoring OMPs removal in conventional wastewater treatment plants or ozonation pilots but their application to activated carbon (AC) adsorption processes was only investigated at lab scale and not in real treatment facilities. In this study, indexes from fluorescence emission/excitation matrices (EEMs) were used to find correlations with the removal of 28 OMPs from a large-scale AC pilot in fluidized bed employed for wastewater advanced treatment, as well as from batch experiments. Differences in OMPs removal could be observed depending on the operational conditions (i.e. pilot or batch experiments, contact time, type of AC) and the physico-chemical properties of the molecules. 7 PARAFAC components were derived from the fluorescence EEMs of 60 samples obtained before and after adsorption. Positive correlations were obtained between the removal of fluorescence indexes and most OMPs, and correlation coefficients were much higher than the ones obtained with UV254, confirming the interesting potential of fluorescence spectroscopy to accurately monitor adsorption performances at the industrial scale. The highest correlation coefficients were obtained for OMPs having the best removals while the ones that were refractory to adsorption, as well as to interactions with DOM, exhibited weak correlations. These results suggest that interactions between OMPs and fluorescing DOM and their subsequent co-adsorption onto AC were at the origin of the correlations found. Lower correlations were also found for the most biodegradable OMPs, which indicated that the occurrence of biological effects could make the monitoring of these compounds more challenging.
Document type :
Journal articles
Complete list of metadatas

https://hal-enpc.archives-ouvertes.fr/hal-03076698
Contributor : Johnny Gasperi <>
Submitted on : Tuesday, December 22, 2020 - 11:45:34 PM
Last modification on : Monday, January 18, 2021 - 8:20:15 AM

File

 Restricted access
To satisfy the distribution rights of the publisher, the document is embargoed until : 2021-06-14

Please log in to resquest access to the document

Identifiers

Citation

Ronan Guillossou, Julien Le Roux, Angélique Goffin, Romain Mailler, Gilles Varrault, et al.. Fluorescence excitation/emission matrices as a tool to monitor the removal of organic micropollutants from wastewater effluents by adsorption onto activated carbon. Water Research, IWA Publishing, 2021, 190, pp.116749. ⟨10.1016/j.watres.2020.116749⟩. ⟨hal-03076698⟩

Share

Metrics

Record views

219