摘要
氟氯烃(CFCs)替代物的应用已超过20年,而三氟乙酸(TFA)是其大气中降解的主要产物之一,在全球范围内广泛分布。文章在概述TFA特性和污染现状的基础上,介绍了TFA的来源、汇和环境影响,综述了现有的降解技术,提出了今后研究的展望。由于TFA性质稳定,易于在水体聚积,近十年来开始得到全球研究人员的关注,研究内容主要在环境浓度监测上。TFA在我国环境浓度低于发达国家,但都呈现增长的趋势。TFA具有生物毒性,在自然条件下无明显光解和生物降解,累积到一定浓度时会对整个生态系统,尤其是陆生植物造成显著危害,从而造成潜在威胁。TFA主要来源于CFCs在大气中的降解,主要汇于水体。TFA现有的成功降解报道较少,相对有效的方法是光催化降解法,这也会成为今后的TFA降解研究的主要方法。
Chlorofluorocarbons (CFCs) -replacement have been applied for more than 20 years, and one of whose degradation products was trifluoroacetic acid (TFA) , who had quite a wide distribution all over the world. On the basis of the summary of features and pollustion status, the environmental impacts, sources, fate and decomposition technologies of TFA were reviewed, some comments for its future studies were also discussed. Given the strong stability and solubility, the impact of TFA has been cocerned and studied...
出处
《环境科学与技术》
CAS
CSCD
北大核心
2010年第6期5-10,共6页
Environmental Science & Technology
基金
自然科学基金项目"基于水合电子高效生成的全氟有机酸光还原降解机理研究"(20807032)
关键词
三氟乙酸
环境影响
来源
降解
trifluoroacetate acid
environmental impact
sources
decomposition
