Тежки метали, екстрахируеми с фракциите на органичното вещество в Техногенни почви | Неауу Metals Extractable with Organic Matter Fractions of Technosols

Bulgarian. The content of heavy metals extractable with organic matter fractions was determined in 4 Technogenic soils. The reclamation method of Technosols determines the differences in organic matter quality аnd quantity. Technogenic soils reclaimed with humus inherited strongly humificated and condensed organic matter in contrast to the technogenic soils reclaimed without humus where the organic matter is a young, immature and in small amount. Complex organo-mineral compounds of heavy metals in technogenic soils have different solubility. The potentially mobile organic compounds of lead and copper prevail in alkaline medium, while zinc predominates in the form of acid-soluble organo-mineral compounds. The strong aggressiveness of 0.1 N solution of H2SO4 determines its low selectivity to metal-organic compounds, particularly of zinc.The total content of heavy metals and organic matter is low аnd determines the low content of lead, copper and zinc in Technosols organic fractions. The maximum extractable concentrations, presented as a percentage of the total contents are 17% lead, 26% copper and 24% zinc in the humus horizons of Technosols.

English. The content of heavy metals extractable with organic matter fractions was determined in 4 Technogenic soils. The reclamation method of Technosols determines the differences in organic matter quality аnd quantity. Technogenic soils reclaimed with humus inherited strongly humificated and condensed organic matter in contrast to the technogenic soils reclaimed without humus where the organic matter is a young, immature and in small amount. Complex organo-mineral compounds of heavy metals in technogenic soils have different solubility. The potentially mobile organic compounds of lead and copper prevail in alkaline medium, while zinc predominates in the form of acid-soluble organo-mineral compounds. The strong aggressiveness of 0.1 N solution of H2SO4 determines its low selectivity to metal-organic compounds, particularly of zinc.The total content of heavy metals and organic matter is low аnd determines the low content of lead, copper and zinc in Technosols organic fractions. The maximum extractable concentrations, presented as a percentage of the total contents are 17% lead, 26% copper and 24% zinc in the humus horizons of Technosols.