In this study, the effect of various initial Zn2+ concentration additionally on microalgae growth and biochemical composition were investigated. The Spirulina platensis biomass of each concentration reached the maximum at the end of the cultivation. However, high levels could severely inhibit the growth of microalgae. Fluorescence activity occurred changes in response to heavy metal stress. Moreover, biochemical composition in Spirulina platensis altered under zinc stress, and the highest contents of phycocyanin (PC), Chlorophyll-a (Chl-a), Carotenoid and zinc accumulation were obtained. The proportion of saturated and polyunsaturated fatty acids increased constantly in response to Zn2+ exposure. Overall, this study indicated that the use of Spirulina platensis is a viable method for treating zinc containing wastewater and harvested microalgae can be processed into high-zinc products.
Bibliographical noteFunding Information:
We are grateful to the Research Project of State Key Laboratory of Food Science and Technology Nanchang University (Project No. SKLF-ZZB-201722 ); Key project of Jiangxi Provincial Department of Science and Technology Jiangxi ( 20161BBF60057 ); the National Natural Science Foundation of China ( 21466022 , 21878139 ); and Special fund for Jiangxi Province ( GCXZ2014-124 100102102082 ) for financial support.
- Chlorophyll fluorescence activity
- Fatty acids
- Photosynthetic pigments
- Spirulina platensis
- Zinc ions