摘要
为了揭示不同结构染料对水生生态系统的毒性作用，研究９种偶氮类及２种蒽醌类染料对斜生栅藻（Ｓｃｅｎｅｄｅｓｍｕｓｏｂｌｉｑｕｕｓ）的生长抑制作用，并通过剖析毒性与结构之间的相关关系，探讨了偶氮染料的毒作用机理．１１种染料对斜生栅藻的４８ｈＥＣ５０在１．０９—４１．２２ｍｇＬ－１之间．偶氮染料分子中所包含偶氮键的个数及芳香环上取代基的亲水性和电性均影响染料的毒性．进一步证实偶氮染料的毒作用机理为ＮＮ键还原为—ＮＨ２后，形成Ｎ离子活性形式与生物大分子发生结合．
In order to disclose the toxic effect of structurally different dyes on aquatic ecosystem,inhibition on the growth of green algae Scenedesmus obliquus of nine azo dyes and two anthraquinone dyes was studied.The mechanism of toxic effect was discussed by analyzing the relationship between toxicity and structure.48h EC50 of the 11dyes was between 109—4122mg·L-1.The number of NN in an azo molecule and the hydrophilicity and the electronic property of substituted groups can affect the toxicity of azo dyes.The toxicity mechanism was further confirmed that NN is first reduced to —NH2 and then activated to N ion which is the active form and combine with biomacromolecules.
出处
《环境科学》
EI
CAS
CSSCI
CSCD
北大核心
1998年第4期22-25,共4页
Environmental Science
基金
国家自然科学基金
天津二十一世纪青年基金
关键词
偶氮染料
斜生栅藻
结构活性
毒性
水体污染
azo dyes,Scenedesmus obliquus,inhibition of growth,structureactivity,relationship.
