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| Titel |
Presence of Pharmaceuticals, Personal Care Products, and priority substances (2008/105EU) in groundwater (Llobregat delta, Barcelona, Spain) |
| VerfasserIn |
Yoar Cabeza, Lucila Candela, Gloria Teijón, Karim Tamoh |
| Konferenz |
EGU General Assembly 2011
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 13 (2011) |
| Datensatznummer |
250048585
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| Zusammenfassung |
| Presence of 166 pharmaceuticals, personal care products, priority substances according to the
2008/105EU Directive and four metals (Cd, Ni, Hg, Pb) were investigated at the
Llobregat delta, (Barcelona, Spain). In the monitoring waters from a tertiary wastewater
treatment plant with an additional treatment of ultrafiltration, reverse osmosis and
UV disinfection (WWATP) and groundwater were sampled. Treated wastewater
was injected in the aquifer through four wells for the development of a hydraulic
barrier against seawater intrusion through four wells (P1 to P4). Over a time period
of three years, first phase of the hydraulic barrier (2007-2010), occurrence and
concentration of microcontaminants in the injected WWTAP water and aquifer has been
investigated in order to obtain: representative results; to get an overall view of the
specific compounds being detected in the aquifer media, and their concentration
levels.
A total of 92 out of 170 target active compounds were identified at detectable
concentration in sampled water at least once. It is important to notice that 34 chemicals,
among them Codeine (analgesic), Ibuprofen (anti-inflammatory), Iopamidol and
Iopromide (organic iodine applied as contrast agent) and Paraxanthine (metabolite of
caffeine), were not detected in WWATP water currently being injected in the aquifer for
the hydraulic barrier system. Chemicals present in groundwater maybe related to
aquifer natural recharge probably receiving a mixture of river water and untreated
wastewater.
The analytes present both in WWATP and monitoring wells distant less than 1 km from
the barrier, were detected in the closest wells (2) to the injection barrier. Its presence was
also favoured by the high transmissivity values of the aquifer at this location. The
monitoring well located 4 m distant from injection well showed similar WWATP
concentration values, and a lower concentration is observed in wells distant from the
injection points. In the aquifer media pH and Eh values indicate that neutral and oxidic
conditions prevail and only TOC reduction is observed in three of the monitoring
wells. All compounds detected in groundwater samples exhibit a great variability
of concentration, being greater than 0.1μg/L for Hydrochlorothiazine (diuretic),
N-acetyl-4-amino-antipyrine metabolite of Metamizol) and BHT (antioxidant). However,
concentrations were in the range of ng/L. To determine the mobility of detected
compounds in ground water studies addressing its persistence and transport in the
aquifer media are being carried out to assess fate and distribution in monitored wells. |
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