摘要
通过研究普通小球藻（ Ｃｈｌｏｒｅｌｌａ ｖｕｌｇａｒｉｓ） 、蛋白核小球藻（ Ｃｈｌｏｒｅｌｌａ ｐｙｒｅｎｏｉｄｏｓａ） 、斜生栅藻（ Ｓｃｅｎｅｄｅｓ ｍ ｕｓ ｏｂｌｉｑｕｕｓ） 对偶氮染料的降解作用，筛选出优势藻种并优化降解条件；对单偶氮染料进行了定量结构—生物降解性相关关系（ Ｑ Ｓ Ｂ Ｒ） 研究．３ 种藻均能利用偶氮染料为其生长的唯一 Ｃ、 Ｎ 源，使染料脱色，蛋白核小球藻具有更强的脱色能力；且藻在无 Ｎ 环境中的脱色率明显高于无 Ｃ 和正常环境；ｐ Ｈ 值对染料脱色影响较大，最佳ｐ Ｈ 值为中性；不同结构的单偶氮染料生物降解性相差很大，脱色率为９ ．１ ％ （８９ ．８ ％ ， Ｑ Ｓ Ｂ Ｒ 研究表明， 偶氮键的最低未占据轨道能量是控制生物降解的主要因素，而脱色率与染料的分子量无关．
Biodegradation effects of azo dyes by three kinds of algae-Chlorella vulgaris,Chlorella pyrenoidosa and Scenedesmus obliquus were studied. The most potent algae and best degradation condition were selected. Furthermore, quantitative structure-biodegradability relationship (QSBR) was studied for single azo dyes. These algae could use azo dyes as only N and C resources for their growth with decolorizing azo dyes. Chlorella pyrenoidosa was most potent in decolorization. The efficiency rate of decolorization in no-nitrogen nutrient solution was higher than that in no-carbon or normal solution. pH value had great effect on the decolorization with most suitable pH value of neutral. Biodegradability of different structural single azo dyes varied significantly, with the decolorization rate ranging 9.1%～89.8%. QSBR study disclosed that the efficiency rate of decolorization was mainly controlled by the energy of the lowest unoccupied orbital of N=N, and had no relationship with molecular weight of the dyes.
出处
《中国环境科学》
EI
CAS
CSCD
北大核心
1999年第4期289-292,共4页
China Environmental Science
基金
天津市科委二十一世纪青年基金
关键词
偶氮染料
绿藻
生物降解
定量结构
相关关系
azo dyes
algae
biodegradation
quantitative structure biodegradability ralationship (QSBR)
