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    Factors determining the attenuation of chlorinated aliphatic hydrocarbons in eutrophic river sediment impacted by discharging polluted groundwater.
        
        Environ. Sci. Technol. 43, 5270-5275 (2009)
    
    
    
				This study explored them potential of eutrophic river sediment to attenuate the infiltration of chlorinated aliphatic hydrocarbon (CAH)- polluted groundwater discharging into the Zenne River near Brussels, Belgium. Active CAH biodegradation by reductive dechlorination in the sediment was suggested by a high dechlorination activity in microcosms containing sediment samples and the detection of dechlorination products in sediment pore water. A unique hydrogeochemical evaluation, including a delta H-2 and delta O-18 stable isotope approach, allowed to determine the contribution of different abiotic and biotic CAH attenuation processes and to delineate their spatial distribution in the riverbed. Reductive dechlorination of the CAHs seemed to be the most widespread attenuation process, followed by dilution by unpolluted groundwater. discharge and by surface water mixing. Although CAHs were never detected in tie surface water, 26-28% of the investigated locations in the riverbed did not show CAH attenuation. We conclude that the. riverbed sediments can attenuate infiltrating CAHs to a certain extent, but will probably not completely prevent CAHs to discharge from the contaminated groundwater into the Zenne River.
			
			
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        Publikationstyp
        Artikel: Journalartikel
    
 
    
        Dokumenttyp
        Wissenschaftlicher Artikel
    
 
     
    
    
        Schlagwörter
        surface-water; mineralization; aquifer; scale; zone
    
 
     
    
    
        Sprache
        englisch
    
 
    
        Veröffentlichungsjahr
        2009
    
 
     
    
        HGF-Berichtsjahr
        2009
    
 
    
    
        ISSN (print) / ISBN
        0013-936X
    
 
    
        e-ISSN
        1520-5851
    
 
     
     
     
	     
	 
	 
    
        Zeitschrift
        Environmental Science & Technology
    
 
		
    
        Quellenangaben
        
	    Band: 43,  
	    Heft: 14,  
	    Seiten: 5270-5275 
	    
	    
	
    
 
  
         
        
            Verlag
            ACS
        
 
        
            Verlagsort
            Washington, DC
        
 
	
         
         
         
         
         
	
         
         
         
    
         
         
         
         
         
         
         
    
        Begutachtungsstatus
        Peer reviewed
    
 
    
        Institut(e)
        Institute of Groundwater Ecology (IGOE)
    
 
    
        POF Topic(s)
        20403 - Sustainable Water Management
    
 
    
        Forschungsfeld(er)
        Environmental Sciences
    
 
    
        PSP-Element(e)
        G-504300-004
    
 
     
     	
    
        PubMed ID
        19708352
    
    
    
        Scopus ID
        67650462893
    
    
        Erfassungsdatum
        2009-12-31