Document Detail


Monitoring reverse osmosis treated wastewater recharge into a coastal aquifer by environmental isotopes (B, Li, O, H).
MedLine Citation:
PMID:  19192794     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Artificial recharge (AR) is gaining importance as a management tool in water stressed regions. The need to prove recovery performance requires new monitoring tools for AR systems. A novel combination of environmental isotope tracers (B, Li, O, H stable isotopes) was tested for the monitoring of AR of tertiary treated, desalinated domestic wastewater into a coastal dune aquifer in Flanders, Belgium. No significant isotope fractionation was observed for the treatment process, which includes low pH RO desalination. The wastewater, after infiltration through ponds and before recovery through pumping wells is characterized by low molar Cl/B ratios (3.3 to 5.2), compared to 130 to 1020 in the wider study area, delta(11)B values close to 0% per hundred, rather homogeneous delta(7)Li values (10.3 +/- 1.7% per hundred), and a 18O and 2H enrichment with respect to ambient groundwater due to evaporation in the infiltration ponds. This confers to the AR component a unique isotopic and geochemical fingerprint. Immediately downstream of the pumping wells and in the deeper part of the aquifer no evidence of AR wastewater could be found, indicating a high recovery efficiency. In the wider area and in the deeper part of the aquifer, isotopes evidence mixing of coastal rain and a fresh paleo-groundwater component with residual seawater as well as interaction with the aquifer material. Combining several isotope tracers provides independent constraints on groundwater flow and mixing proportions as a complement to hydrodynamic modeling and geochemical studies.
Authors:
W Kloppmann; E Van Houtte; G Picot; A Vandenbohede; L Lebbe; C Guerrot; R Millot; I Gaus; T Wintgens
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Environmental science & technology     Volume:  42     ISSN:  0013-936X     ISO Abbreviation:  Environ. Sci. Technol.     Publication Date:  2008 Dec 
Date Detail:
Created Date:  2009-02-05     Completed Date:  2009-03-05     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0213155     Medline TA:  Environ Sci Technol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  8759-65     Citation Subset:  IM    
Affiliation:
BR G M, 3 av, C, Guillemin B.P. 36009, F-45060 Orléans 2, France. w.kloppmann@brgm.fr
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MeSH Terms
Descriptor/Qualifier:
Belgium
Boron / chemistry
Environment*
Geography
Hydrogen / chemistry
Isotope Labeling / methods*
Isotopes
Lithium / chemistry
Osmosis*
Oxygen / chemistry
Seawater*
Soil
Waste Disposal, Fluid*
Water / chemistry
Water Movements
Water Purification
Water Supply*
Chemical
Reg. No./Substance:
0/Isotopes; 0/Soil; 1333-74-0/Hydrogen; 7439-93-2/Lithium; 7440-42-8/Boron; 7732-18-5/Water; 7782-44-7/Oxygen

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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