Dynamics of Heavy Metals in Soils of a Reed Bed System
作者:
W.W. Wenzel,
W.A. Pollak,
W.E. H. Blum,
期刊:
International Journal of Environmental Analytical Chemistry
(Taylor Available online 1992)
卷期:
Volume 46,
issue 1-3
页码: 41-52
ISSN:0306-7319
年代: 1992
DOI:10.1080/03067319208026995
出版商: Taylor & Francis Group
关键词: Heavy metals;reed bed system;soil;sewage;redox potential;heavy metal complexation
数据来源: Taylor
摘要:
Heavy metal balances of a reed bed system (soil pH > 7, carbonate content about 30%) continuously flooded with sewage during 5 years indicate that only Pb, Zn, Cd and Cu were partly stored in the soil. Strong reductive conditions, high sewage percolation and metal complexation with soluble organic compounds caused a considerable leaching of Fe, Mn, Ni and Cr from the soil and formation of amorphous iron oxides. The results indicate that continously flooded reed bed systems with high percolation rates are not suitable for the elimination of heavy metals. Conversely, it should be possible to purify metal contaminated soils through percolation of sewage with low metal content.
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