微藻去除重金属镉的抗性机理研究进展

Research progress in microalgae resistance to cadmium stress

摘要:

与水体中重金属去除的传统方法相比，生物吸附法是一种更具经济效益和环境效益的技术。微藻由于自身的廉价性和高吸附性已成为高效生物吸附剂的材料来源。要评价微藻在镉(Cd)去除方面的应用潜力，解析微藻抗重金属的机理是必要条件。因此，本文从抗Cd微藻种类，Cd对微藻光合作用、生长及结构的影响，胞外吸附的机理，胞内积累的机理，以及基因调控水平，阐述了目前微藻抗Cd的研究进展，以期为后续的研究提供理论帮助。

Abstract:

Compared with traditional methods, removal of heavy metals from water by biosorption is a more economic and environmental friendly technology. Microalgae have become a potential biological adsorbent for their low cost and high adsorption rate. To evaluate the potential application value of microalgae in the removal of cadmium, the mechanism of microalgae resistance to heavy metals needs to be analyzed. This review summarizes the microalgae species resistant to Cd, the effects of Cd on microalgae growth, photosynthesis and cell structure, the mechanism of extracellular adsorption and intracellular accumulation, and the cadmium resistance gene regulation. It is of reference value for further heavy metal removal researches.