Growth and bioaccumulation of cadmium, zinc, lead, copper in <i>Dunaliella</i> sp. isolated from Homa lagoon, eastern Aegean Sea

Abstract

Present study consists the growth of cell and bioaccumulation capacity of Cadmium (Cd), Zinc (Zn), Lead (Pb), Copper (Cu) by <i>Dunaliella</i> sp. isolated from Homa Lagoon, Eastern Aegean, Turkey. Sterile medium f/2 was used for the cultivation. Growth rate, mean growth rate, relative growth rate and generation time of <i>Dunaliella</i> sp. were calculated for determining the growth of cell. In addition, optimum pH values were determined for each heavy metal. Our results pointed out that the optimum time for harvesting <i>Dunaliella</i> sp. was in 8 days. Uptake of heavy metals of <i>Dunaliella</i> sp. showed high tendency for zinc accumulation followed by copper, lead, and the lowest tendency was for cadmium. Highest bioaccumulation of Zn was determined to be 151.64 µg/L at 2.45 of pH under <i>in situ</i> conditions. pH had noticeably affected the bioaccumulation capacity of <i>Dunaliella</i> sp.