In 2015, dissolved As, Cu and Pb levels were measured for the winter and summer seasons in the coastal waters of Caspian Sea in Azerbaijan. Ten stations were sampled around the vicinity areas of the Hovsan channel and Hovsan WWTP discharge outfall, while control samples were obtained 3 km away from the effluent. Levels of heavy metals were assessed using ICP-MS. Due to the rapid dilution, the concentrations of trace metals increased from coastal to seaward stations. High values of As and Pb were recorded in the Hovsan channel area and control zone in summer, while in winter it was constant high for both area. The hot spot area for Cu was observed in the Hovsan channel site in winter. Heavy metals and solids were generally considerably deleterious at discharge area. The high levels and behavior of the metals were assessed, and it is therefore, correlated to salinity, nitrites and ammonium. Moreover, As and Cu appear to co-vary more with Ammonium and Nitrite ions in the control area for the winter samples compared to the summer samples.
Determination Of Pb(Ii), Cd(Ii) Ions After Wastewater Treatment Process At Hovsan Aeration Station (Published)
Hovsan aeration station is the largest wastewater cleaning center in south Caucasus region. Approximately, 60% of household sewage of Baku is discharged to Caspian Sea after treatment process. It is so necessary to analysis some toxic heavy metals in cleanded water such as cadmium and lead due to providing security of biodiversity of Caspian Sea and determining of cleaning effectiveness. Standard methods were used for determining of chemical characteristics of the household waste water. Pb, Cd contents samples were determined by inductively coupled plasma mass spectrometry (ICP-MS). The concentrations of metals in waste water samples after treatment process as follows: Pb (sample 1) 7.078 ppb, Pb (sample) 2 -5.522 ppb, Cd (sample 1) 4.766 pb, Cd(sample 2) 3.751 ppb. The concentrations heavy metals in the cleaned waste water samples from Hovsan Aeration Station were with the permissible limits of the European Union Directive and World Health Organization water quality guidelines.