Abstract
AbstractOf the unicellular green algae species, Chlamydomonas reinhardtii has only recently gained greater attention for the treatment of heavy metal contamination in aqueous solutions. In the present study, C. reinhardtii was used to remove Cu and Pb metal ions from the Litani River in Lebanon. Three samples were collected from three different sites located along the tributaries of Litani. Short-term (40 min) metal biouptake experiments were performed using 0.2 g L−1 of freeze-dried and living algal cells. In the studied samples, dead cells showed higher removal efficiency for both metal ions than living cells. The percentage removal of dead algae for Cu (28.66%) is about 1.8 times higher than that of living cells (16%). For Pb, biosorption (23.4%) is about 2.75 times higher than bioaccumulation (8.5%). Water chemistry significantly affects metal speciation, bioavailability, and biouptake by living and dead cells. As predicted by Visual MINTEQ program, only very small fractions of Cu and Pb were present ...
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