Abstract
This work consists of assessing the degree of pollution caused by wastewater, Power station discharge pipe and petroleum port in the gulf of Tobruk-Libya. This study is based on the analysis of the physicochemical parameters, the parameters indicating pollution and the determination of pH, DO, BOD, OOM, phenol, Salinity, nutrients (PO4, SiO3, NO2, NO3 and NH3), sodium and potassium on seawater samples taken from the site. The sampling was carried out during the April of year 2015. The results obtained show significant values in physicochemical parameters, pollution indicator parameters. The results of the pollution indicator parameters show the presence of important pollution at the site studied. It is clear from the determination of physicochemical parameters that the site under investigation shows a high contamination of seawater according to pollution caused by wastewater, Power station discharge pipe and petroleum port near the gulf of Tobruk-Libya. The absence of treatment and the long-term exposure to these discharges will lead to dangerous levels which maybe lead to destruction of marine life may affect people living near the port.
Highlights
Every year, pollution of seawater is gaining more attention according to serious health problems may be caused by direct contact with seawater
Some of water quality parameters like colour, turbidity, temperature, salinity, conductivity, dissolved oxygen; radioactivity and suspended solids have been used as indicators of physical data which is vital for the proper management of the marine environment [3]
Temperature (T) The mean values of the temperature recorded in the sea water of the studied sites vary between 17.4°C and 19.5°C while the highest temperature (30.1°C) recorded at Power station (11) and that was the reason for higher seawater temperatures in southern part of Tobruk gulf (Table 1)
Summary
Pollution of seawater is gaining more attention according to serious health problems may be caused by direct contact with seawater. Most of this wastewater is returned to the environment [1] As it is usually loaded with organic matter, it becomes a major source of pollution for the environment that receives it [2]. Some of water quality parameters like colour, turbidity, temperature, salinity, conductivity, dissolved oxygen; radioactivity and suspended solids have been used as indicators of physical data which is vital for the proper management of the marine environment [3]. Variation in some of the physical and chemical parameters such as rainfall, temperature, salinity, nitrate-nitrogen, phosphate-phosphorus, sulphate, biological oxygen demand and chemical oxygen demand have been reported to influence phytoplankton abundance [4]. According to Suthers and Rissik [5], the major limiting nutrients for phytoplankton are nitrogen in form of ammonium (NH4), nitrite (NO3) and phosphate (PO3). Nitrogen tends to be the limiting nutrients in marine systems, while phosphate is the limiting nutrient in the
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