Micropollutant fluxes in urban environment: a catchment perspective.
Proctor, Kathryn; Petrie, Bruce; Lopardo, Luigi; Muñoz, Dolores Camacho; Rice, Jack; Barden, Ruth; Arnot, Tom; Kasprzyk-Hordern, Barbara
Dolores Camacho Muñoz
This study provided a holistic understanding of the sources, fate and behaviour of 142 compounds of emerging concern (CECs) throughout a river catchment impacted by 5 major urban areas. Of the incoming 169.3kg d-1 of CECs entering the WwTWs, 167.9kg d-1 were present in the liquid phase of influent and 1.4kg d-1 were present in the solid phase (solid particulate matter, SPM). Analysis of SPM was important to determine accurate loads of incoming antidepressants and antifungal compounds, which are primarily found in the solid phase. Furthermore, these classes and the plasticiser, bisphenol A (BPA) were the highest contributors to CEC load in digested solids. Population normalised loads showed little variation across the catchment at 154±12mg d-1 inhabitant-1 indicating that population size is the main driver of CECs in the studied catchment. Across the catchment 154.6kg d-1 were removed from the liquid phase during treatment processes. CECs discharged into surface waters from individual WwTWs contributed between 0.19kg d-1 at WwTW A to 7.3kg d-1 at WwTW E, which correlated strongly with the respective contributing populations. Spatial and temporal variations of individual CECs and their respective classes were found in WwTW influent (both solid (influentSPM) and liquid phases (influentAQ)) throughout the catchment, showing that different urban areas impact the catchment in different ways, with key variables being lifestyle, use of over-the-counter pharmaceuticals and industrial activity. Understanding of both spatial and temporal variation of CECs at the catchment level helped to identify possible instances of direct disposal, as in the case of carbamazepine. Analysis of surface waters throughout the catchment showed increasing mass loads of CECs from upstream of WwTW A to downstream at WwTW D, showing clear individual contributions from WwTWs. Many CECs were ubiquitous throughout the river water in the catchment. Daily loads ranged from 0.005g d-1 (ketamine, WwTW A) up to 1890.3g d-1 (metformin, WwTW C) for the 84/138 CECs that were detected downstream of the WwTWs. For metformin this represents the equivalent of ~1,890 tablets (1,000mg per tablet) dissolved in the river water downstream of WwTW C.
|Journal Article Type||Article|
|Journal||Journal of hazardous materials|
|Peer Reviewed||Peer Reviewed|
|Institution Citation||PROCTOR, K., PETRIE, B., LOPARDO, L., MUÑOZ, D.C., RICE, J., BARDEN, R., ARNOT, T. and KASPRZYK-HORDERN, B. . Micropollutant fluxes in urban environment: a catchment perspective. Journal of hazardous materials [online], In Press. Available from: https://doi.org/10.1016/j.jhazmat.2020.123745|
|Keywords||Pharmaceuticals; Pesticides; Endocrine disruptors; River; Wastewater; Solids; Personal care products; Chemicals of emerging concern|
This file is under embargo until Aug 24, 2021 due to copyright reasons.
Contact firstname.lastname@example.org to request a copy for personal use.
You might also like
Enantiospecific behaviour of chiral drugs in soil.
Estimation of community-wide exposure to bisphenol A via water fingerprinting.