ISSN:
1573-5117
Keywords:
ecotones
;
dissolved organic matter
;
humic substances
;
heavy metals
;
N-NO3
;
P-PO4
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Abstract The migration of nitrates, phosphates and dissolved organic compounds (DOC) in groundwater from fields through meadows to small ponds was analysed. The migration of humic substances, polysugars and polyamides was emphasized. The role of DOC in transporting heavy metals (Cd, Cu, Pb, Zn) was also estimated. When groundwater from a field was passing under a meadow, a decrease in humic substances and an increase in polyamides and polysugar concentrations were observed. Simultaneously, inorganic forms of heavy metals decreased, while forms bound to DOC increased. Thus, a strip of meadow surrounding an aquatic system, can influence heavy metal migration with groundwater by its impact on DOC. Moreover, it was found that small mid-field ponds accumulate DOC to a large extent. The concentration of humic substances amounted on average to 34.0 mg l−1 and to 8.2 mg l−1 for polyamides and polysugars, respectively. In such ponds, the concentration of heavy metals, especially Cu and Zn in forms bound to DOC, also increased.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00007184
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