26 research outputs found
Remobilization of heavy metals during the resuspension of Liangshui River sediments using an annular flume
Ecophysiological adaptation and metal accumulation in water hyacinth from two tropical rivers
Ecological Risks Assessment and Pollution Source Identification of Trace Elements in Contaminated Sediments from the Pearl River Delta, China
Antibiotic resistance gene abundances associated with waste discharges to the Almendares River near Havana, Cuba
Mercury Levels in Sediments and Mangrove Oysters, <em>Crassostrea rizophorae</em>, from the North Coast of Villa Clara, Cuba
Seasonal variations in antibiotic resistance gene transport in the Almendares River, Havana, Cuba
Water Hyacinths (<em>Eichhornia crassipes</em>) as Indicators of Heavy Metal Impact of a Large Landfill on the Almendares River near Havana, Cuba
Assessment of Total Mercury Levels in <em>Clarias gariepinus</em> from the Sagua la Grande River, Cuba
Onečišćenje rijeke Save u Srbiji teškim metalima i bakterijama
The aim of this study was to establish microbial and heavy metal pollution of the Sava River at three locations close to industry and urban areas (Šabac, Obrenovac, Beograd) in Serbia. Heavy metal analysis included Cu, Zn, Pb, and Cd in the river water and sediment samples. Using the microbiological analysis we tried to establish the effectiveness of total coliforms, faecal coliforms and Escherichia coli in detecting pollution of surface waters. We found that E. coli levels steadily increased downstream from Šabac (location 1; 2100 MPN per 100 mL) to Belgrade (location 3; 10000 MPN per 100 mL). To prevent bacterial contamination, it is necessary to reduce the discharge of wastewater with faecal matters near highly populated towns. Heavy metal levels in sediments correlated with those in the river water. Fluctuations attributed mainly to anthropogenic sources were not high. These results point to acceptable anthropogenic contribution to heavy metal content in the Sava River and to low environmental risk.Ispitivani su mikrobiološki parametri i teški metali u rijeci Savi na tri lokacije u blizini industrijskih i urbanih centara (Šabac, Obrenovac, Beograd). Analiza je obuhvatila parametre kvalitete: teške metale – Cu, Zn, Pb i Cd u riječnoj vodi i sedimentu te bakterije i patogene bakterije u riječnoj vodi. Radi utvrđivanja bakterijske kontaminacije površinskih voda testirani su koliform Escherichia coli i fekalni koliformi.
Brojnost E. coli povećava se od lokacije 1 prema ušću Save od 2100 do 10000 u 100 mL NVB (najvjerojatniji broj). Nađen je velik broj biološki aktivnih mikroorganizama i bakterija. Koncentracija teških metala u sedimentu u korelaciji je s njihovom koncentracijom u riječnoj vodi ako se izrazi s pomoću koefi cijenta distribucije Kd (dm3 kg-1) između čvrste i tekuće faze. Predložen je postupak za procjenu toksičnosti teških metala