Department of Chemical Engineering, National Institute of Technology Agartala, West Tripura, Agartala, Tripura, 799046, India.
Department of Bioengineering, National Institute of Technology Agartala, West Tripura, Agartala, Tripura, 799046, India.
Environ Sci Pollut Res Int. 2024 Jul;31(35):48545-48560. doi: 10.1007/s11356-024-34390-8. Epub 2024 Jul 20.
Microalgae are under research focus for the simultaneous production of biomolecules (e.g., carbohydrates, proteins, pigments and lipids) and bioremediation of toxic substances from wastewater. The current study explores the capability of indigenously isolated microalgae (Desmodesmus subspicatus) for the phycoremediation of As(III) and Cr(VI). Variation of biomolecules (carbohydrate, protein, lipid and chlorophyll) was investigated during phycoremediation. D. subspicatus survived up to the toxicity level of 10 mg/L for As(III) and 0.8 mg/L for Cr(VI). A 70% decline in carbohydrate accumulation was observed at 10 mg/L of As(III). An increased content of proteins (+ 28%) and lipids (+ 32%) within the cells was observed while growing in 0.5 and 0.2 mg/L of As(III) and Cr(VI) respectively. A decrease in carbohydrate accumulation was noted with increasing Cr(VI) concentration, and the lowest (- 44%) was recorded at 0.8 mg/L Cr(VI). D. subspicatus showed an excellent maximum removal efficiency for Cr(VI) and As(III) as 77% and 90% respectively.
微藻是目前的研究热点，可同时生产生物分子（如碳水化合物、蛋白质、色素和脂质），并对废水中的有毒物质进行生物修复。本研究探讨了本土分离的微藻（菱形藻）对 As(III)和 Cr(VI)的光修复能力。在光修复过程中研究了生物分子（碳水化合物、蛋白质、脂质和叶绿素）的变化。菱形藻在 As(III) 10mg/L 和 Cr(VI) 0.8mg/L 的毒性水平下仍能存活。在 10mg/L 的 As(III)下，观察到碳水化合物积累减少了 70%。在 0.5 和 0.2mg/L 的 As(III)和 Cr(VI)中，细胞内的蛋白质（增加了 28%）和脂质（增加了 32%）含量增加。随着 Cr(VI)浓度的增加，碳水化合物的积累减少，在 0.8mg/L 的 Cr(VI)下记录到最低值（减少了 44%）。菱形藻对 Cr(VI)和 As(III)的最大去除效率分别达到 77%和 90%。
