In this study, concentrations of heavy metals in Ni, Cd, Pb, Cu, Fe and Hg in sediments,
concentration of mercury in water and brown algae Sargassum sp., Padina sp. and
Cystoseira sp. In the coastal waters of Bushehr, during the two winter season of 1396 and
summer of 1397, sampling from four stations of Helilah, Abashirincan, Rafael and Oil
tanker was carried out in three replications from each station. The macroalgae samples
were first washed with sufficient amounts of water in the same area and the sediment
samples of the area were also prepared precisely from the algae harvesting stations. The
analysis of heavy metals in sediments and algae after chemical digestion and preparation
was investigated by the atomic absorption spectrophotometer SavantaΣ model of
Australia. The concentrations of metals in sediments were respectively Fe> Ni> Pb> Cu>
Cd> Hg, and the mean of the measured values were 365.26, 7.22, 6.73, 2.36, 1.13 and
0.19 μg /g d.w. All metals except lead metal had a higher mean in winter and the mean
of Hg metal in water was 0.23 μg / g d.w. Concentration of Heavy Metals in Algae Padina
sp. in Fe> Cd> Pb> Ni> Cu> Hg, for Algae Sargassum sp. Fe> Pb> Cu> Ni> Cd> Hg
and for algae Cystoseira sp. As Fe>Cu>Pb>Ni>Cd>Hg the highest concentrations of
heavy metals were found in Padina sp. algae. The results of the correlation between the
concentration of heavy metals in the sediments and the amount of them in the algal tissue
showed that the amount of Fe and Cu heavy metals in Padina sp. algae with its amount
in the sediment, the amount of heavy metals of Ni, Cd, Fe and concentration of Hg in
water with its amount inside algae Sargassum sp. And concentration of heavy metals of
Cu, Ni, Cd and Hg with its amount in algae Cystoseira sp. Had a direct and significant
correlation.