Effects of sterilization on the chemical forms of heavy metals in soils

Aomi Suda, Tomoyuki Makino, Yuji Maejima, Ikuko Akahane, Teruo Higashi

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)


We used sequential extraction to investigate changes in the amounts of six chemical forms of manganese, cobalt and cadmium in soil samples after chloroform fumigation. The six forms were designated as follows: exchangeable, dilute-acid-soluble, manganese-oxide-occluded, organically bound, iron-oxide-occluded and residual. For all three metals, the decreases in the amounts of manganese-oxide-occluded forms were equivalent to the sum of the increases in the amounts of exchangeable and dilute-acid-soluble forms. The amounts of the other three forms did not change significantly after fumigation. These results indicate that some of the cobalt and cadmium in the manganese oxides was converted into exchangeable and dilute-acid-soluble forms, which suggests that soil sterilization may increase the availability of these heavy metals to plants.

Original languageEnglish
Pages (from-to)623-626
Number of pages4
JournalSoil Science and Plant Nutrition
Issue number5
Publication statusPublished - 2009 Oct


  • Cadmium
  • Chemical forms
  • Cobalt
  • Manganese
  • Manganese oxides


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