| Title | Prioritization of organic contaminants in a reclaimed water irrigation system using wide-scope LC-HRMS screening |
|---|---|
| ID_Doc | 7600 |
| Authors | García-Vara, M; Orlando-Véliz, D; Bonansea, RI; Postigo, C; de Alda, ML |
| Title | Prioritization of organic contaminants in a reclaimed water irrigation system using wide-scope LC-HRMS screening |
| Year | 2023 |
| Published | |
| Abstract | A prioritization procedure was developed and implemented at the local level to identify the most relevant organic contaminants of emerging concern (CECs) in an agricultural area irrigated with reclaimed water. A wide-scope screening methodology based on UPLC-HRMS analysis was applied to holistically characterize the CEC footprint in water and its spatial and temporal variations. One hundred and fifty-eight CECs, including phar-maceuticals, industrial chemicals, and pesticides, among others, were identified with a confidence level of 2 in the water samples investigated. After water treatment in the reclamation plant and transport within the irrigation channel network, more than a hundred compounds were still detected at the location where water is abstracted for crop irrigation. Compound ecotoxicity and occurrence (semi-quantified concentrations or peak intensity) were the parameters used to prioritize CECs in the water used for irrigation. Results pointed at venlafaxine, O-desmethyl-venlafaxine, galaxolidone, theophylline/paraxanthine, oxybenzone, and N-phenyl-1-naphtylamine, among others, as CECs of concern in the investigated area. This study provides a simple and cost-effective approach to detecting site-specific priority pollutants that could otherwise be overlooked by national or Euro-pean regulations. The prioritization tool provided contributes to rationally designing monitoring and attenuation programs and efficiently managing water resources, by ensuring the safety of reclaimed water applications. |
| https://doi.org/10.1016/j.jhazmat.2023.132119 |
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