Assessing the ecological long-term impact of wastewater irrigation on soil and water based on bioassays and chemical analyses

摘要: The reuse of treated wastewater for irrigation and groundwater recharge can counteract water scarcity reduce pollution surface waters, but assessing its environmental risk should likewise consider effects associated to the soil. present study therefore aimed at determining impact on habitat quality after soil passage percolation by applying bioassays chemical analysis. Lab-scale columns four different soils encompassing standard European three field varying characteristics pre-contamination were continuously percolated with simulate long-term irrigation. Wastewater percolates tested immobilization Daphnia magna growth inhibition green algae (Pseudokirchneriella subcapitata) lentils (Lemna minor). observed phytotoxicity was mostly reduced passage, in some also increased algae. Chemical analysis covering an extensive set wastewater-born organic pollutants demonstrated that many them considerably particularly through peaty soils. Taken together, these results indicated phytotoxic substances may be removed while existing (e.g. metals) leach impair percolate quality. Soils without plants (Avena sativa, Brassica napus) bacteria (Arthrobacter globiformis) reproduction collembolans (Folsomia candida) oligochaetes (Enchytraeus crypticus, Eisenia fetida). two appeared deteriorated least one organism (enchytraeids, or bacteria), pre-contaminated it improved (for and/or enchytraeids). did not seem raise concentrations classical priority substances, a significant retention found zinc several micropollutants, soils, thus matching soils' higher removal efficiency. Overall, our demonstrate benefits come cost deteriorating depend respective considered test organism. approach employed here represents feasible tool assess integrated lab-scale being predictive scenarios field-scale.