D10: Impact of Contaminants - Hydromod

Integrated Water Resource Management for Important Deep European Lakes and their Catchment Areas
EUROLAKES
D10: Impact of Contaminants
FP5_Contract No.: EVK1-CT1999-00004
Version: 4.0
Date: 25/07/01
File: D10-vers.4.0.doc
Page 101 of 136
• In 8 out of 17 influent samples Tributyltin was detected above the detection concentration
of 0,01 µg/l.
• The highly toxic Tributyltin was found in the effluent samples of 4 plants above the
detection concentration of 0,01 µg/l, with a max. concentration of 0,014 µg/l.
• The most frequently detected organo-tin compound in the effluent was monobutyltin
with 5 out of 17 samples above the detection concentration of 0,01 µg/l. The maximum
concentration lay at 0,019 µg/l.
• Dibutyltin was detected only in one effluent sample above the detection concentration
(0,01 µg/l), although it could be analysed in many influent samples.
• In 9 out of 17 influent samples the concentration of Dibutyltin was above 0,01 µg/l,
with the maximum detected concentration at 0,023 µg/l.
• All other Organo-tin compounds were not detectable above the detection concentration
of 0,005 µg/l.
Alkylphenoles
• The dominating alkylphenole in influent and effluent of the WWTPs was 4-NPtec.(mixture
of 4-NP and 2-NP in ratio 9:1).The maximum concentration in the influent
samples was 9,4 µg/l; in the effluent 1,9 µg/l.
• Further frequently detected alkylphenoles in influent and effluent were 4-tert –
Buthylphenole and 4-tert-Octylphenole. The 4-tert–Buthylphenole concentrations in
the effluent samples ranged from 0,06 to 0,45 µg/l, for 4-tert-Octylphenole between
0,06 and 0,24 µg/l.
Nonylphenolethoxylates (NP1EO, NP2EO)
• In the influents of the monitored treatment plants surprisingly high maximum concentrations
of 11,4 µg/l NP1EO and 27,5 µg/l NP2EO were found.
• In the effluent of these plants the concentrations were significantly lower (NP1EO
Min0,142 µg/l, Max. 0,86 µg/l; NP2EO Min. 0,169 µg/l, Max. 2,164 µg/l;)
Buthylhydroxyanisol (BHA)
• The antioxidans (E 320) could be found in the influent as well as in the effluent of 9
out of 17 treatment plants above the detection concentration of 0,05 µg/l (Min. effluent:
0,044 µg/l; Max. effluent 0,137 µg/l).
Bisphenol A (BPA)
• The max concentration detected in the influent was 8,43 µg/l.
• The concentrations in the effluent were significantly lower with a median (n=17) of
0,243µg/l, and a maximum concentration of 0,884 µg/l.