EJPAU 2007. Nędzarek A. , Kubiak J. , Tórz A. ORGANIC POLLUTION OF LAKE DABIE WATERS IN 1997-2000

Electronic Journal of Polish Agricultural Universities (EJPAU) founded by all Polish Agriculture Universities presents original papers and review articles relevant to all aspects of agricultural sciences. It is target for persons working both in science and industry,regulatory agencies or teaching in agricultural sector. Covered by IFIS Publishing (Food Science and Technology Abstracts), ELSEVIER Science - Food Science and Technology Program, CAS USA (Chemical Abstracts), CABI Publishing UK and ALPSP (Association of Learned and Professional Society Publisher - full membership). Presented in the Master List of Thomson ISI.

2007
Volume 10
Issue 3

Topic:

Fisheries

ELECTRONIC
JOURNAL OF
POLISH
AGRICULTURAL
UNIVERSITIES

Nędzarek A. , Kubiak J. , Tórz A. 2007. ORGANIC POLLUTION OF LAKE DABIE WATERS IN 1997-2000, EJPAU 10(3), #08.
Available Online: http://www.ejpau.media.pl/volume10/issue3/abs-08.html

ORGANIC POLLUTION OF LAKE DABIE WATERS IN 1997-2000

Arkadiusz Nędzarek, Jacek Kubiak, Agnieszka Tórz
Department of Hydrochemistry and Water Protection, Agricultural University of Szczecin, Poland

ABSTRACT

The hydrochemical survey of Lake Dabie – an integral part of the upper estuary of the Odra River – was carried out in the years 1997-2000. The study was aimed at demonstrating a relationship between anthropogenic pollution and environmental conditions. Water samples were collected at six stations in each season of the temperate climate zone. The analyses covered water temperature, concentrations of phenol, surface-active agents, and petroleum ether-extractable substances, gene-ral measures of organic matter load (BOD₅, COD_Mn, COD_Cr), chlorophyll a, and dissolved oxy-gen. Water temperature ranged between 3.8°C and 23.4°C (annual mean temperature 13.2°C). Dissolved oxygen content ranged between 2.2 and 16.3 mg O₂·dm^-3, with oxygen percent satur-ation ranging between 40.3 and 164.0%. The measures of organic matter concentrations were as follows: COD_Cr 10.0-49.2 mgO₂·dm^-3, BOD₅ 1.1-7.4 mgO₂·dm^-3, chlorophyll a 2.2-327.9 mg·m^-3. The concentrations of petroleum ether-extractable substances ranged from 3.0 mg·dm^-3 to 22.7 mg·dm^-3, phenol from 0.013 to 0.100 mg·dm^-3, and anionic surfactants from 0.018 to 0.147 mg LAS·dm^-3. Statistical analyses has revealed a weak influence of water flow on the values of the analysed parameters. The correlations between surfactants, ether extract and the flow were negative (respectively, r = -0.40 and r = -0.20). The phenol-flow correlation was positive (r = 0.30). Chemical oxygen demand was highly positively correlated with the substances extracted with petroleum ether (r = 0.60) and negatively correlated with anionic surfactants (r = -0.40). Biochemical oxygen demand was positively correlated with the content of chlorophyll a, particularly in lake Dabie (r = 0.70).

Key words: lake Dabie, organic matter, petroleum ether-extractable substances, phenol, surface-active agents.

Arkadiusz Nędzarek
Department of Hydrochemistry and Water Protection,
Agricultural University of Szczecin, Poland
K. Krolewicza 4H, 71-550 Szczecin, Poland
email: arek@fish.ar.szczecin.pl

Jacek Kubiak
Department of Hydrochemistry and Water Protection,
Agricultural University of Szczecin, Poland
K. Krolewicza 4H, 71-550 Szczecin, Poland

Agnieszka Tórz
Department of Hydrochemistry and Water Protection,
Agricultural University of Szczecin, Poland
K. Krolewicza 4H, 71-550 Szczecin, Poland

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