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Hydroponics reducing effluent's heavy metals discharge.
- Source :
-
Water science and technology : a journal of the International Association on Water Pollution Research [Water Sci Technol] 2009; Vol. 59 (1), pp. 175-83. - Publication Year :
- 2009
-
Abstract
- This paper investigates the capacity of Nutrient Film Technique (NFT) to control effluent's heavy metals discharge. A commercial hydroponic system was adapted to irrigate lettuces with primary treated wastewater for studying the potential heavy metals removal. A second commercial hydroponic system was used to irrigate the same type of lettuces with nutrient solution and this system was used as a control. Results showed that lettuces grew well when irrigated with primary treated effluent in the commercial hydroponic system. The NFT-plant system heavy metals removal efficiency varied amongst the different elements, The system's removal efficiency for Cr was more than 92%, Ni more than 85%, in addition to more than 60% reduction of B, Pb, and Zn. Nonetheless, the NFT-plants system removal efficiencies for As, Cd and Cu were lower than 30%. Results show that lettuces accumulated heavy metals in leaves at concentrations higher than the maximum acceptable European and Australian levels. Therefore, non-edible plants such as flowers or pyrethrum are recommended as value added crops for the proposed NFT.
- Subjects :
- Flowers growth & development
Flowers metabolism
Hydroponics economics
Industrial Waste
Plant Leaves growth & development
Plant Leaves metabolism
Plants, Edible growth & development
Plants, Edible metabolism
Waste Disposal, Fluid economics
Water Supply
Hydroponics methods
Metals, Heavy isolation & purification
Waste Disposal, Fluid methods
Water Pollutants, Chemical isolation & purification
Subjects
Details
- Language :
- English
- ISSN :
- 0273-1223
- Volume :
- 59
- Issue :
- 1
- Database :
- MEDLINE
- Journal :
- Water science and technology : a journal of the International Association on Water Pollution Research
- Publication Type :
- Academic Journal
- Accession number :
- 19151500
- Full Text :
- https://doi.org/10.2166/wst.2009.736