ISSN:
1572-9834
Schlagwort(e):
Adsorption
;
phosphorus removal
;
pond
;
sediment
Quelle:
Springer Online Journal Archives 1860-2000
Thema:
Biologie
Notizen:
Abstract Phosphorus discharged into the water column of lakes, streams, reservoirs, and ponds is either assimilated by algae or retained by the sediment. A laboratory study was conducted using intact sediment-water columns obtained from three ponds to measure their capacity to assimilate P. Phosphorus retention by these systems was determined at two P levels (2 and 10 mg PL−1 or equivalent to an area loading of 26 and 130 μg cm−2). The potential P removal rates were 20.4, 28.8 and 30.8 μg P CM−2 day−1 for PSF (pond adjacent to septic fields), PP(pond adjacent to a pasture), and PAF (pond adjacent to agricultural farm land), respectively. Longer residence time was needed for P removal at high P loading (10 mg PL−1) than at low P loading (2 mg P L−1). At high P loading, 76–82% of the floodwater P was removed within 10 days. All sediments showed a greater sorption capacity under reduced conditions than under oxidized conditions. At the P levels evaluated, pond sediments functioned as net sinks for water column P.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1007/BF00188151
Permalink
