摘要
采用GC/MS技术对三峡库区干流及22条支流的47个表层水样中的15种酚类化合物进行分析,结果表明库区干流和支流表层水样中酚类总浓度的几何均值分别为52.47和87.99 ng.L-1.干流和支流中非氯酚类总浓度的几何均值均大于氯酚类,库区表层水以非氯代酚组分为主.苯酚、邻甲酚和2-硝基酚是库区干流水样中主要的酚类,分别占干流Σ酚类的79.1%、3.7%和3.6%.苯酚、邻甲酚、2,6-二氯酚和2-硝基酚是库区支流水样中的优势污染物,分别占支流Σ酚类的77.5%、5.4%、3.8%和2.2%.本研究中苯酚和2-硝基酚的检出浓度与《国家污染物环境健康风险名录》中的标准限值相比较,远低于可能导致生物毒性危害的标准限值,与国内外其他地区水体中苯酚含量相比也处于较低污染水平,说明表层水样中苯酚与2-硝基酚污染给研究区水环境带来的潜在风险较小.
Forty-seven surface water samples were collected from the main stream and 22 tributaries in area of the Three Gorges Reservoir,15 phenolic compounds in these samples were analyzed using GC/MS.The results showed that the concentrations of phenolic compounds in the samples from the main stream and tributaries were 52.47 ng·L-1 and 87.99 ng·L-1,respectively.The concentrations of non-chlorinated phenols were higher than those of chlorinated phenols in the main stream and tributaries,and so the non-chlorinated phenols were the predominant compounds in these surface water samples.Phenol,o-cresol and 2-nitrophenol were the predominant compounds accounted for 79.1%,3.7% and 3.6% in the samples from the main stream,respectively.Phenol,o-cresol,2,6-dichlorophenol and 2-nitrophenol were the main compounds accounted for 77.5%,5.4%,3.8% and 2.2% in the samples from the tributaries,respectively.As compared the concentrations of phenol and 2-nitrophenol with the standard limits in The National Environmental Health Risk List,the levels of phenol and 2-nitrophenol were much lower than the standard limits,suggesting negligible risk of phenol and 2-nitrophenol in these samples.
出处
《环境科学》
EI
CAS
CSCD
北大核心
2012年第8期2580-2585,共6页
Environmental Science
基金
中国水利水电科学研究院青年基金项目(环集1113
环集1233)
国家水体污染控制与治理科技重大专项(2012ZX07203-006
2008ZX07209
2009ZX07527)
国家创新研究群体基金项目(51021006)
关键词
三峡库区
表层水
酚类
分布特征
潜在风险
Three Gorges Reservoir
surface water
phenols
distribution characteristics
potential risk
