Fate and impact of wastewater-borne micropollutants in lettuce and the root-associated bacteria.
    
    
        
    
    
        
        Sci. Total Environ. 831:154674 (2022)
    
    
    
      
      
	
	    The reuse of water for agricultural practices becomes progressively more important due to increasing demands for a transition to a circular economy. Treated wastewater can be an alternative option of blue water used for the irrigation of crops but its risks need to be evaluated. This study assesses the uptake and metabolization of pharmaceuticals and personal care products (PPCPs) derived from treated wastewater into lettuce as well as the impact on root-associated bacteria under a realistic and worst-case scenario. Lettuce was grown in a controlled greenhouse and irrigated with water or treated wastewater spiked with and without a mixture of fourteen different PPCPs at 10 μg/L or 100 μg/L. After harvesting the plants, the same soil was reused for a consecutive cultivation campaign to test for the accumulation of PPCPs. Twelve out of fourteen spiked PPCPs were detected in lettuce roots, and thirteen in leaves. In roots, highest concentrations were measured for sucralose, sulfamethoxazole and citalopram, while sucralose, acesulfame and carbamazepine were the highest in leaves. Higher PPCP concentrations were found in lettuce roots irrigated with spiked treated wastewater than in those irrigated with spiked water. The absolute bacterial abundance remained stable over both cultivation campaigns and was not affected by any of the treatments (type of irrigation water (water vs. wastewater) nor concentration of PPCPs). However, the irrigation of lettuce with treated wastewater had a significant effect on the microbial α-diversity indices at the end of the second cultivation campaign, and modified the structure and community composition of root-associated bacteria at the end of both campaigns. Five and fourteen bacterial families were shown to be responsible for the observed changes at the end of the first and second cultivation campaign, respectively. Relative abundance of Haliangium and the clade Allorhizobium-Neorhizobium-Pararhizobium-Rhizobium was significantly affected in response to PCPPs exposure. Caulobacter, Cellvibrio, Hydrogenophaga and Rhizobacter were significantly affected in microcosms irrigated with wastewater.
	
	
	    
	
       
      
	
	    
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        Publication type
        Article: Journal article
    
 
    
        Document type
        Scientific Article
    
 
    
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        Keywords
        Microbial Ecotoxicology ; Pharmaceuticals And Personal Care Products (ppcp) ; Plant Growth-promoting Bacteria ; Plant Uptake ; Treated Wastewater
    
 
    
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        Language
        english
    
 
    
        Publication Year
        2022
    
 
    
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        HGF-reported in Year
        2022
    
 
    
    
        ISSN (print) / ISBN
        0048-9697
    
 
    
        e-ISSN
        1879-1026
    
 
    
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	    Volume: 831,  
	    Issue: ,  
	    Pages: ,  
	    Article Number: 154674 
	    Supplement: ,  
	
    
 
    
        
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            Elsevier
        
 
        
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        Reviewing status
        Peer reviewed
    
 
     
    
        POF-Topic(s)
        30202 - Environmental Health
    
 
    
        Research field(s)
        Environmental Sciences
    
 
    
        PSP Element(s)
        G-504700-003
G-504700-001
    
 
    
        Grants
        European Commission
German Federal Office for Agriculture and Food
Deutsches Bundesamt für Landwirtschaft und Ernährung BLE
    
 
    
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        Erfassungsdatum
        2022-07-25