Impact of acid sulfate soils on the geochemistry of rivers in south-western Finland

Maria E. Nyberg, Peter Österholm, Miriam I. Nystrand

    Research output: Contribution to journalArticleScientificpeer-review

    19 Citations (Scopus)


    Large areas of acid sulfate (AS) soils are located along the coastal plains of Finland, and previous studies have shown that after reclamation they release extreme quantities of metals to watercourses in mid-western and northern Finland. In this study on streams of south-western Finland, where little information about AS soils is available, these soils were found to exhibit the same pattern of elevated metal- and sulfate concentrations as in the notorious AS soil landscapes of mid-western Finland. Meteorologically/hydrologically driven temporal variations of these elements were great in the most affected streams. There were also significant positive implications regarding future environmental work; AS soils in the highlighted region were found to cause sudden temporal influxes of acidic water only in the most affected streams, indicating that the overburden and soils of the area discharge well buffered water. Moreover, it was indicated that the high (less toxic) metal concentrations are largely caused by erosion of suspended phyllosilicates (<0.45 μm) from farmland rather than by AS soils.

    Original languageEnglish
    Pages (from-to)157-168
    Number of pages12
    JournalEnvironmental Earth Sciences
    Issue number1
    Publication statusPublished - May 2012
    MoE publication typeA1 Journal article-refereed


    • Acid sulfate soils
    • Acidity
    • Hydrogeochemistry
    • Metals
    • River
    • South-western Finland


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