Distribution of Mn, Al, Cu and Zn in a constructed wetland receiving municipal sewage

A constructed wetland at Nucice near Prague, Czech Republic, has been in operation since 1996 and the system is designed to treat sewage from 650 PE together with stormwater. The total area of the beds planted with Phalaris arundinacea and Phragmites australia is 3,224 m2 (two beds 62 x 26 m each)....

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Bibliographic Details
Published in:Water science and technology 2003-01, Vol.48 (5), p.299-305
Main Authors: VYMAZAL, J, KRASA, P
Format: Article
Language:English
Subjects:
Aluminum
Applied sciences
Aquatic plants
Artificial wetlands
Biodegradation, Environmental
Biological and medical sciences
Biological treatment of waters
Biotechnology
Copper
Ecosystem
Environment and pollution
Environmental Monitoring
Exact sciences and technology
Filtration
Freshwater plants
Fundamental and applied biological sciences. Psychology
Geologic Sediments - chemistry
Gravel
Industrial applications and implications. Economical aspects
Leaves
Manganese
Metal concentrations
Metals
Metals, Heavy - analysis
Municipal wastewater
Other wastewaters
Phalaris
Phalaris - chemistry
Phalaris arundinacea
Phragmites australis
Plant tissues
Poaceae - chemistry
Pollution
Roots
Sediments
Sewage
Sewage - chemistry
Sewage treatment
Stems
Storm sewers
Stormwater
Tissue Distribution
Waste Disposal, Fluid - methods
Waste treatment
Wastewater treatment
Wastewaters
Water Purification - methods
Water treatment and pollution
Wetlands
Zinc
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Summary:A constructed wetland at Nucice near Prague, Czech Republic, has been in operation since 1996 and the system is designed to treat sewage from 650 PE together with stormwater. The total area of the beds planted with Phalaris arundinacea and Phragmites australia is 3,224 m2 (two beds 62 x 26 m each). Pea gravel (8/16 mm) is used as a filtration material. During the period 1998-1999, removal of Mn, Al, Cu and Zn from wastewater and distribution of the metals in sediments and plants were studied. Metals were measured in three vertical profiles of the filtration bed (0-15, 15-30 and 30-60 cm) and at four locations along the longitudinal profile of the bed (5, 16, 32, 48 m from the inlet). Metal concentrations in plant tissues (roots, stems, leaves) of Phalaris arundinacea were measured along the longitudinal profile of the bed at the same locations as for sediments. The results showed that the retention of metals is high (up to 98%) with the major decrease in metal concentrations within the first 5 metres of the bed. The major decrease in metal concentration in the filtration material was observed in the inlet zone between 5 and 16 metres. In Phalaris tissue, metal concentrations decreased in the order roots > stems > leaves but statistically significant differences varied among the studied metals.
ISSN:0273-1223
1996-9732
DOI:10.2166/wst.2003.0336