Adsorption Characteristics of Heavy Metals to Humic Acid

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  • 重金属のフミン酸への吸着特性
  • ジュウキンゾク ノ フミンサン エ ノ キュウチャク トクセイ

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Humic acid, which is widely distributed in the soil and natural water, has high complexation ability with various kinds of heavy metals, and creates a strong effect on the mobility and solubility of heavy metals. In this paper, the adsorption characteristics of heavy metals to humic acids, which were extracted from different soils based on the extraction method of International Humic Substance Society, were compared with the results of molecular weight distributions of heavy metals absorbed to humic acid with gel filtration chromatography. Judging from the results, lead was detected at the same points to the humic acid, and Zinc was absorbed to organic matter with molecular weight greater than 100,000. However, copper was absorbed to wide range of humic acid. In addition, it was observed that the absorbed amounts of heavy metals were correlated with the amounts of functional groups of humic acids.

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