Unité de Technologie et Valorisation Alimentaire, Centre d'Analyses et de Recherche, Université Saint-Joseph, Faculté des sciences, Campus des Sciences et Technologies, Mar Roukos, Mkallès, P.O Box 11-514, Riad El Solh, 1107 2050 Beirut, Lebanon E-mail:
Centre Régional de l'eau et de l'environnement, Université Saint-Joseph, Faculté d'ingénierie, Campus des Sciences et Technologies, Mar Roukos, Mkallès, P.O Box 11-514, Riad El Solh, 1107 2050 Beirut, Lebanon.
Water Sci Technol. 2020 Sep;82(5):851-860. doi: 10.2166/wst.2020.381.
The microalgae treatment system is an economically and environmentally friendly option for wastewater treatment. However, the effects of heavy metal toxicity on microalgae cells can limit the use of microalgae in the treatment of industrial effluents rich in heavy metals. In this work, we studied the effect of Ni, Cu, Al, Hg and Pb, added as single-metal solutions to the microalgae culture medium, on the growth of 20 indigenous strains belonging to a wide variety of microalgae genera. Ni and Cu were the most toxic to the strains tested. A highly tolerant strain of the Phacus genera was selected. We determined the effect of multiple combinations of Ni, Al and Pb on the cell growth of the selected strain and on the removal capacity of each metal from the microalgae culture medium. Phacus was able to grow in the multi-metal solution (Ni, 5.00 mg/L; Al, 9.94 mg/L and Pb 1.00 mg/L) and to efficiently remove the metals, with removal capacities of 8.82 ±0.16 mg/g for Ni, 2.09 ± 0.05 mg/g for Pb and 16.90 ± 0.53 mg/g for Al. The reductions of Ni, Al and Pb concentrations were 66.67, 64.28 and 79.17% respectively.
微藻处理系统是一种经济环保的废水处理方法。然而，重金属毒性对微藻细胞的影响限制了微藻在处理富含重金属的工业废水中的应用。在这项工作中，我们研究了镍、铜、铝、汞和铅作为单一金属溶液添加到微藻培养基中对 20 种属于各种微藻属的本地菌株生长的影响。镍和铜对测试菌株的毒性最大。选择了一株对 Phacus 属高度耐受的菌株。我们确定了多种组合的镍、铝和铅对选定菌株的细胞生长和每种金属从微藻培养基中的去除能力的影响。Phacus 能够在多金属溶液（镍 5.00mg/L；铝 9.94mg/L 和铅 1.00mg/L）中生长，并能有效地去除金属，镍的去除率为 8.82±0.16mg/g，铅的去除率为 2.09±0.05mg/g，铝的去除率为 16.90±0.53mg/g。镍、铝和铅的浓度分别降低了 66.67%、64.28%和 79.17%。
