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Reaction of sewage farm soils to different irrigation solutions in a column experiment 2. Heavy metals and their leaching
Author(s) -
Hoffmann Christian,
Savric Irena,
Jozefaciuk Grzegorz,
Hajnos Mieczyslaw,
Sokołowska Zofia,
Renger Manfred,
Marschner Bernd
Publication year - 2002
Publication title -
journal of plant nutrition and soil science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.644
H-Index - 87
eISSN - 1522-2624
pISSN - 1436-8730
DOI - 10.1002/1522-2624(200202)165:1<67::aid-jpln67>3.0.co;2-2
Subject(s) - leaching (pedology) , soil water , environmental chemistry , chemistry , cadmium , zinc , sewage sludge , metal , irrigation , total organic carbon , sewage , heavy metals , lessivage , dissolved organic carbon , copper , environmental engineering , environmental science , agronomy , soil science , organic chemistry , biology
Heavy metal polluted soils from a recent and a former sewage farm were studied in a 2.5 years‐column experiment under various irrigation regimes and/or liming treatment. The copper (Cu), zinc (Zn), lead (Pb), and cadmium (Cd) concentrations in the soil and the leaching of these elements were studied. The amounts of the metals leached differed markedly between both soils, however, the effect of various irrigation treatments was less pronounced. The heavy metal content in the soil solid phase depended on the organic carbon content, however these dependencies differed for both soils as well as for particular metals. In lower soil horizons, the amount of heavy metals bound by unit mass of organic carbon was constant. It was assumed that the same amount of the heavy metals can be bound by the unit mass of the DOC. Under this assumption the amount of the DOC in the former sewage farm soil was in general too small to carry all heavy metals leached. Therefore leaching of their cationic forms has been postulated. The amount of the DOC in the present sewage farm soil could carry more heavy metals than these being leached. Therefore, an undersaturation of the DOC in heavy metals could occur in this soil.