摘要
选取壬基酚(nonylphenol,NP)作为研究对象,研究了水中2种常见淡水藻(小球藻和鱼腥藻)对壬基酚的光降解促进作用,并对藻引发水中壬基酚的光降解途径进行了分析;同时也研究了天然水中普遍存在的物质成分(腐殖酸和铁离子)与藻协同引发壬基酚的光降解及其影响机制.结果表明,含淡水藻的水溶液经过光照后能引发其中壬基酚的光降解;藻、腐殖酸和铁离子的水溶液经过光照后,对壬基酚光降解的增强促进作用更大,在含藻、腐殖酸和铁离子的水溶液中,4 h光照后壬基酚的降解率可达58%.根据此结果推测藻/腐殖酸和铁离子体系光照后能产生更多的活性物质,从而促进水中有机污染物的光降解.
The photodegradation of nonylphenol induced by two common freshwater algae was investigated.The mechanism of nonylphenol photodegradation induced by algae was analyzed.The synergistic induction of nonylphenol degradation by algae and substances in water such as humic acid and ferric ions was also investigated.Results showed that the algae could induce the photodegradation of nonylphenol.The degradation of nonylphenol in water in the presence of algae,humic acid and ferric ions was obvious and the efficiency of degradation could reach 58% after 4 h illumination.Based on the results,it was speculated that the algae,humic acid and ferric ions system could produce more active oxygen after illumination,which could promote the photodegradation of the organic contaminants in water.
出处
《环境科学》
EI
CAS
CSCD
北大核心
2012年第10期3466-3472,共7页
Environmental Science
基金
国家自然科学基金项目(20177017)
上海应用技术学院校内基金项目(YJ2011-12)
关键词
壬基酚
光照
藻
铁离子
降解
nonylphenol
illumination
algae
ferric ions
degradation
