EXTENT OF MARINE WATER INFLUENCE ON CHEMICAL FEATURES OF LAKE BUKOWO BOTTOM SEDIMENTS

Jan Trojanowski, Janusz Bruski

Department of Chemistry, Pomeranian Pedagogical University

Arciszewskiego St. 22b, 76-200 Słupsk, Poland

Abstract

The 15 - cm layer of bottom sediments of the Lake Bukowo was examined. Organic sediments make up to 32% of the Lake Bukowo bottom surface, the mixed sediments - 52% and the sandy ones - 16%. Bottom sediments of this lake displayed a high content of organic matter ca. 28%, nitrogen ca. l. 2%, silica 65% and phosphorus 0.9%. Nitrogen and phosphorus were deposit into sediments in the main form of organic compounds. These sediments were characterized by low content of metals (average: Ca 1%, Mg 0.8 %, Fe 1.3% and Al 1.1%). The pollution of Lake Bukowo increased comparison to 1987.

Key words: bottom sediments, lake, granulometric, chemical compositions