摘要
采用化学品毒性藻类测试的标准方法得到Cr(Ⅵ )抑制蛋白核小球藻、聚球藻、极大螺旋藻、钝顶螺旋藻、羊角月牙藻和四尾栅藻生长的 96h EC50 分别为 4 96、6 5 0、1 1 1 6、1 1 74、1 2 43、2 0 89mg/L ;6种蓝绿藻对Cr(Ⅵ )耐受性大小顺序为 :四尾栅藻 >羊角月牙藻 >钝顶螺旋藻 >极大螺旋藻 >聚球藻 >蛋白核小球藻 .不同藻类对Cr(Ⅵ )的敏感程度可能与细胞大小和形状、细胞壁结构、藻类分泌物以及酶的作用有关 .本文运用X射线吸收近边结构 (XANES)初步研究了蛋白核小球藻对Cr(Ⅵ )
A standard method of algal bioassay for determining the toxicity of toxic chemicals was applied to the interaction between Cr(Ⅵ) and six blue green microalgae. The 96h EC 50 of hexavalent chromium on the growth of Chlorella pyrenoidosa, Synechococcus, Spirulina maxima, Spirulina platensis, Selenastrum capriornutum and Scenedesmus quadricauda were 4 96、6 50、11 16、11 74、12 43 and 20 89mg/L, respectively. The tolerance of the six blue green microalgae to Cr(Ⅵ) was in the order of Scenedesmus quadricauda >Selenastrum capriornutum >Spirulina platensis >Spirulina maxima >Synechococcus >Chlorella pyrenoidosa . The sensitivity of these species to Cr(Ⅵ) might relate to the cell size, the structure of cell wall, as well as the redox reaction caused by the exudate or enzyme. X ray absorption near edge structure(XANES) was used to study the accumulation and transformation of Cr(Ⅵ) in Chlorella pyrenoidosa .
出处
《环境科学》
EI
CAS
CSCD
北大核心
2003年第2期13-18,共6页
Environmental Science
基金
国家自然科学基金资助项目 (2 0 1770 2 9)
关键词
六价铬
蓝绿藻
毒性效应
XANES
hexavalent chromium
blue green microalgae
toxicity
XANES
