Accumulation of heavy (HM) duckweed (Lemna minor) under conditions of anthropogenic pollution of the Hodza River

Zubkova V. M., Arslanbekova F. F., Makakhaniuk Z. S.

The possibility of testing the state of water and bottom sediments of the Hodza River based on the study of the chemical composition of Lemna minor is being considered. A high positive relationship was established between the HM content in duckweed and bottom sediments of the river, a high positive relationship between the iron content in water and duckweed. A contrasting technogenic phytogeochemical anomaly in iron was revealed, which can be defined as selective, characteristic of duckweed. The biological absorption coefficients for the duckweed / water system are several orders of magnitude higher in comparison with the duckweed / bottom sediment system. According to the total removal of elements by duckweed, they can be arranged in a row: Fe> Zn> Cu> Pb> Cd, which completely coincides with the range of the content of these elements in plants.

Keywords:anthropogenic pollution, heavy metals, bottom sediments, concentration coefficient, biological absorption coefficient, phytogeochemical anomaly.