Abstract
Hydraulic parameters were studied in a free water-surface vertical flow constructed wetland plant. The coefficients of hydraulic permeability of a typha-planted and a scirpus-planted unit were determined at different loading rates. Fluorescent dyes (uranine, pyranine and eosin) were examined for their capability to determine the mean residence time in comparison to bromide. Bromide, eosin and pyranine yielded a slight retention of approx. 10% and 15 % compared to the theoretical residence time, whereas uranine was accelerated, as our results suggest.
Original language | English |
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Pages (from-to) | 635-641 |
Number of pages | 7 |
Journal | Fresenius Environmental Bulletin |
Volume | 7 |
Issue number | 11-12 |
State | Published - 1998 |
Externally published | Yes |
Keywords
- Constructed wetlands
- Fluorescent dyes
- Hydraulic conductivity
- Residence time