maryam Ameri - Research group of Industrial Microorganism Biotechnology, ACECR, Mashhad, Iran
Neda Soltani - Dep. petroleum microbiology, Research Institute of Applied Science, ACECR, Tehran, Iran.
ladan baftehchi - Dep. of Petroleum Microbiology, Research Institute of Applied Science, ACECR, Tehran, Iran
mehdi bolfion - Dep. of Petroleum Microbiology, Research Institute of Applied Science, ACECR, Tehran, Iran
Seyedeh Mehri Javadi - ۲- Dep. of Plant physiology & Genetics, Research Institute of Applied Science, ACECR, Tehran, Iran
Ghassam Jalali - Research group of Industrial Microorganism Biotechnology, ACECR, Mashhad, Iran
Mehruz Dezfulian - Department of Microbiology, College of Basic Sciences, Karaj Branch, Islamic Azad University, Alborz, Iran
behnaz bagheri - Dep. of Petroleum Microbiology, Research Institute of Applied Science, ACECR, Tehran, Iran

In the present study, the optimization of immobilization structures along with Scenedesmus sp. and the determination of heavy metals (Ni, Cr) absorption rate have been investigated. Polymers in combination with salts were performed in alginate in order to study the stability of formed structures in cross linking agents. Beads with stable structure in synthesized heavy metal solution inoculated and the adsorption percentage has been recorded. Results showed that the most stable beads were formed in ۲ and ۳% alginate along with CaCO۳ application beside BaCl۲ as solidified solution. Reduction of heavy metal in these structures had the most percentage and it was observed that if the incubation time of beads in solidified solution decreased, the percentage of heavy metal reduction would increase to ۸۶%. Although alginate beads showed the highest absorption rate of heavy metal, the presence of S. sp. in all treatments occasionally increased heavy metal absorption up to ۱۵%.

Alginate, Heavy metal Removal, Microalgae, Stability