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By Barbara Kołwzan

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By Barbara Kołwzan

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It is possible to remove pollutants from soil by using biological methods. They are economic and environmentally friendly. Glossary Edaphic: (i) Of or pertaining to the soil. (ii) Resulting from or influenced by factors inherent in the soil or other substrate, rather than by climatic factors. Fulvic acids: Yellow organic material that remains in solution after removal of humic acid by acidification. Humus: Total organic compounds in soil exclusive of undecayed plant and animal tissues, their "partial decomposition" products, and the soil biomass.

Blue-green algae Blue-green algae are a group of organisms previously considered to be algae. Currently they are classified to the Procaryota kingdom and the sub-kingdom of Eubacteria. There are unicellular, colonial (loose cells connected with a single mucus envelope) and filamentous forms (Fig. 4). The prokaryotic organisms contain a nucleoid instead of an isolated nucleus. In contrast to other bacteria they are capable of conducting oxygen photosynthesis. They contain chlorophyll and sometimes disguise it in other photosynthesizing pigments: ficocyanine and alloficocyanine.

Diatom - Epithemia sp. Fig. 8. Diatom Gomphonema constrictum Melosira varians Navicula sp. Fig. 9. Diatoms occur in Odra River: Melosira varians (left arrow), Navicula sp. ● Euglenophyta (Fig. 10-11). Euglenoids usually have an elongated shape. Their cells are equipped with flagella that allow movement in water or they move by crawling along the bottom. The cells are surrounded by a soft envelope called the pellicle. Chromatophores contain chlorophyll, carotenes and xanthophylls. Within the cell there is a clearly visible nucleus and the eyespot called stigma, sensitive to a light stimulus.

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