Связывание металлов-экотоксикантов гуминовыми кислотами торфа
2012
Kozlovskaya, I.P., Belarus State Agrarian Technical Univ., Minsk (Belarus) | Kovrik, S.I., National Academy of Sciences (Belarus). Institute for Problems of Natural Resources Use and Ecology
One of the most essential ecological problems of modern age is pollution of ecosystems with heavy metals. Concentration of heavy metals in radical soil layer provides their input in plants and in human food. The most dangerous pollutant elements are compounds of copper, nickel and chrome, widely used in agriculture and industry. Rise of heavy metals content in soil leads to misbalance of mineral nutrition of plants, causing specific changes of phyto- and micro- biocoenosis, declining crop yield of plants and productivity of animals. High toxicity of heavy metals and their ability to bioaccumulation determines necessity of detail investigation of migration of heavy metals in agricultural ecosystems. Intensity of soil pollution is determined with soil components. The highest ability of heavy metals' fixation reveal humic substances. They create metal-humic complexes. For high-humic (peat) soils active fixation of heavy metals is specific. The possibility of fixation of heavy metals by humic acids of peat is investigated. It is shown that the formation of the precipitation with different content of metal-humic complexes depends on the conditions of binding.
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