Application of microalga Chlorella sorokiniana in wastewater bioremediation – case of lake Robule

Abstract

Heavy metals remain a major pollutant in waters near mining sites. Water pollution is a current, longterm problem that affects plants and organisms that live in these water systems, and the effect is very harmful not only for individual species and populations, but also for the entire biological community. This study analyzed the potential of the microalga Chlorella sorokiniana in the adsorption of four selected metals: Fe, Cu, Zn and Ni, all present in high amounts in Lake Robule. This pilot study was conducted to evaluate the potential of these microalgae for possible use in future bioremediation treatment of these water. A laboratory study of metal accumulation in lake water samples lasted for 7 days, after which a total decrease in metal concentration was observed, namely Fe ~25%, Cu ~17%, and Zn ~4% on the seventh day. This study confirms the strong potential of microalgae C. sorokiniana to reduce the presence of heavy metals in conditions known for the low pH value of water with a high percentage of Fe and other heavy metals.