Survey on physicochemical parameters and pollutants in artificial reefs in Hormozgan province(Bandar-e- Lengeh area)

Survey on physicochemical parameters and pollutants in artificial reefs in Hormozgan province (Bandar-elengeh area) was conducted during 2004-2007. After establishing of artificial reefs by Hormozgan Shilat office, selection of sampling stations is performed at summer and winter seasons. Summer and winter values for temperature were 32.9 0.5 and 21.4 0.5 centigrade. pH had a little range of tolerance (8-8.95) and its annual mean was 8.81 0.13 . Transparency is an effective parameter on monitoring of artificial reefs. Summer and winter values for Transparency were 3.8 3.72 and 5.63 0.78 meters. Annual mean of dissolved oxygen and salinity were 7.11 0.1 ppm and 39.13 0.26 ppt. Annual means of dissolved nitrate, nitrite and orthophosphate were 4.9 0.7, 1.44 0.09 and 0.97 0.06 micromole per liters respectively. Measurement of chl.a was done in summer only. The maximum concentration was 2.95 microgram per liter. Annual average percentage of silt, clay and sand were 33 10.68, 21.63 4.84 and amp; 45.96 12.66 respectively. Organic Carbon percentage had a little rang (0.61 1.92) of changes. Its annual percentage was 0.99 0.2. Summer and winter values for COD were 1.53 0.48 and amp; 1.62 0.48 milligrams per liter. Concentration of heavy metals (Cu , Zn, Fe, Ni and amp; Pb) in sediments were determined .All of heavy metals (especially Pb) had higher concentration in summer than winter. The annual means of Cu, Zn, Fe, Ni and amp; Pb were 26.5, 54.3, 27.6, 70.85 and amp; 48.15 micrograms per gram of dried sediment. Normal aliphatic hydrocarbons (C10-C 30) were determined in water and amp; sediment. Annual average and the summer and winter values for normal aliphatic hydrocarbons in water were 258.7, 217.8 and amp; 299.6 micrograms per liter and for sediment were 5726.8, 12616.8 and amp; 2132.2 micrograms per gram of dried sediment. Key words: artificial reef, Persian Gulf, Bandar-e-Lengeh, heavy metals, aliphatic normal hydrocarbons, physicochemical parameters.