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• 作者：Zongli Yao 么宗利 (1) (2)
  Chengqi Ying 应成琦 (1)
  Jianxue Lu 陆建学 (1)
  Qifang Lai 来琦芳 (1)
  Kai Zhou 周凯 (1)
  Hui Wang 王慧 (1)
  Ling Chen 陈玲 (2)
  
• 关键词：salinity ; carbonate alkalinity ; Scenedesmus obliquus ; ion composition ; cation removal
• 刊名：Chinese Journal of Oceanology and Limnology
• 出版年：2013
• 出版时间：November 2013
• 年：2013
• 卷：31
• 期：6
• 页码：1248-1256
• 全文大小：
• 作者单位：Zongli Yao 么宗利 (1) (2)
  Chengqi Ying 应成琦 (1)
  Jianxue Lu 陆建学 (1)
  Qifang Lai 来琦芳 (1)
  Kai Zhou 周凯 (1)
  Hui Wang 王慧 (1)
  Ling Chen 陈玲 (2)
  
  1. East China Sea Fisheries Research Institute, Research Center for Saline Fisheries Technology, Chinese Academy of Fishery Sciences, Shanghai, 200090, China
  2. State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China
  
• ISSN：1993-5005

文摘

The capability of Scenedesmus obliquus to remove cations (K+, Na+, Ca2+, Mg2+) from saline-alkaline water was investigated at different salinities (0, 5, 10, 15, 20, 25) and carbonate alkalinities (0, 5, 10, 15, 20, 25, 30, 35 mmol/L). K+, Na+, Ca2+, and Mg2+ in saline-alkaline water were efficiently removed by S. obliquus. The maximum removal of the cations (29.37 mg for K+, 185.85 mg for Na+, 23.07 mg for Ca2+, 66.14 mg for Mg2+) occurred at salinity 25. The maximum removal of K+ (2.28 mg), Na+ (6.62 mg), Ca2+ (1.01 mg), and Mg2+ (0.62 mg) occurred at carbonate alkalinities of 25 mmol/L for K+, 35 mmol/L for Na+, 20 mmol/L for Ca2+, and 25 mmol/L for Mg2+, respectively. Under a salinity stress, the concentration of Na+ in S. obliquus increased significantly, while that of K+ decreased significantly. The concentrations of Ca2+ and Mg2+ decreased as well. The ratios of K+/Na+, Ca2+/Na+, and Mg2+/Na+ were significantly lower in all salinity treatments than those of the control. Under alkaline stress, the concentrations of Na+ and K+ in S. obliquus decreased significantly and the ratios of K+/Na+, Ca2+/Na+, and Mg2+/Na+ were significantly higher in all treatments than in the control. Moreover, the concentrations of Ca2+ and Mg2+ in S. obliquus at alkalinities of 5–10 mmol/L were significantly higher than those of the other treatments. The removal of Na+ by S. obliquus mainly occurs through biosorption, and Mg2+ and Ca2+ were removed through both biosorption and bioaccumulation.