张兵;王利红;徐玉新;尹西翔;

• 1:山东农业大学资源与环境学院
• 2:中国科学院生态环境研究中心
• 3:山东省科学院
• 4:中国科学院城市环境研究所

摘要(Abstract)：

砷是一种广泛存在于环境中的有毒物质。集胞藻属于单细胞藻类,广泛分布在淡水生态环境中。采用营养液培养的方法探讨了集胞藻(Synechocystis sp.PCC6803)对砷的累积和转化特性。当集胞藻分别暴露于2和100 μM的无机As(Ⅲ)和As(V)14d后,体内的砷形态均以As(V)为主,并且在100μM浓度处理下检测到DMA,结果表明集胞藻体内存在砷的氧化和还原机制,只有高浓度砷才能诱导集胞藻体内的砷甲基化机制起作用。研究了集胞藻在含磷培养基中对不同形态砷的吸收动力学特征,As(Ⅲ)的最大吸收速率大于As(V)的最大吸收速率,而集胞藻对As(V)的亲和性大于As(Ⅲ)。考察了集胞藻对含砷溶液的净化作用,72h集胞藻净化效率能达到41%,此结果表明集胞藻具有修复砷污染水体的潜力。

关键词(KeyWords)： 集胞藻;三价砷;五价砷

Abstract:

Keywords:

基金项目(Foundation): 山东省博士基金(No.BS2009HZ024)

作者(Author): 张兵;王利红;徐玉新;尹西翔;

Email:

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