摘要
在北京市通州地区河流沟渠上设立23个采样点,于2005年7月、10月、12月和2006年3月分四次采集水样·采用SPE-GC-MS内标定量分析方法,检测了水体中16种美国EPA优控多环芳烃(PAHs)的浓度·结果表明,通州地区河流水体∑PAHs全年浓度范围为87—1889ng·l-1,夏季最高,春季最低·南部的凉水河/凤港减河、凤河高于中部的通惠河/北运河/沟渠,北部的潮白河相对较低·16种PAHs以二/三环为主,所占比例将近90%·
Twenty three surface water samples from the rivers in Tongzhou district of Beijing were collected from July 2005 to March 2006. The samples were analyzed for 16 PAH compounds based on SPE-GC-MS method under quality assurance and quality control. Total PAHs concentrations vary from 87 ng·l^-1 to 1889 ng·l^-1. The highest and lowest concentrations were found in summer and spring. The concentrations of the total PAils in the rivers from the southern part of the study area are higher than those from the middle part of the study area, and concentration of the total PAHs in the river from the northern part of the study area is the lowest. The dominated compounds are 2 ring and 3 ring PAHs, which are up to almost 90%. Chrysene pollution is more serious than others. Most 4 ring, 5 ring and 6 ring PAHs in the south rivers exceeded the EPA water quality standard. As a whole, total PAHs concentrations of the rivers in Tongzhou are at the medium level in reported studies in China. Some of the 16 PAHs which are deleterious for human body are at the level of slight pollution.
出处
《环境化学》
CAS
CSCD
北大核心
2007年第4期523-527,共5页
Environmental Chemistry
基金
国家自然科学基金项目(40525003
40371105)
国家重点基础研究专项(2003CB415004)
关键词
多环芳烃
通州
地表水
PAHs, Tongzhou, surface water.
