Naslov
Transformation of organic matter and bank filtration from a polluted stream

Autori
Ćosović, Božena ; Hršak, Dubravka ; Vojvodić, Vjeročka ; Krznarić, Damir

Izvornik
Water research (0043-1354) 30 (1996), 12; 2921-2928

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
bank filtration ; organic matter ; polluted stream ; groundwater ; transformation

Sažetak
A case study of the examination of the changes of organic matter in a small, highly polluted stream and the adjacent alluvial aquifer is presented. The investigated stream was actually a collector of effluents from the baker"s yeast and pharmaceutical industry. The stream was characterized with COD of several thousand mg O2 l-1, most part of which was biodegradable organic matter. Biodegradation processes took place in the surface water, having as a consequence oxygen depletion in the stream. The organic matter content of river sediment was more than 10% of the dry weight of sediment. Bank filtration of organic substances was investigated in a number of observation wells at the distances from 5-150 m from the river (under different hydrological conditions). The infiltration of organic matter from the polluted stream into the aquifer was found to be significant only at the hydrological conditions when the water level exceeds the altitude of the stream bed. The organic matter present in groundwater samples was mainly of humic/fulvic type, and was not degraded during 64 days of laboratory biodegradation experiment.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

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