雨水径流对景观水体中多环芳烃污染特征的影响

以北京市长河湾流域某排污口附近景观水体为研究对象,通过对水体中PAHs的连续检测,研究了雨水径流对景观水体中PAHs污染特征的影响,以期为景观水体中PAHs的控制和管理提供科学依据.结果表明,长河湾景观水体中∑16PAHs在降雨时的浓度变化与降雨强度及降雨量有关,长河湾水体中溶解态PAHs组分以3环和4环为主,2环组分所占的比例最少.水体底部沉积物中PAHs含量明显高于岸边,沉积物中∑16PAHs含量约为229.2μg.kg-1,岸边土壤中∑16PAHs含量约为185.6μg.kg-1,低于国内外一些水域沉积物中PAHs污染浓度.

Effect of stormwater runoff on polycyclic aromatic hydrocarbons pollution characteristics in landscape water: case study of Changhe River

A landscape water(near a drain outlet) of the Changhe River in Beijing was taken as the research object,and the component and concentration of polycyclic aromatic hydrocarbons(PAHs) were monitored in series rainfall day.The characteristics of PAHs pollution affected by rainwater runoff were analyzed,in order to provide a scientific basis for PAHs′ control and management in landscape water.The results show that the concentration of ∑16PAHs was mainly affected by rainfall depth and rainfall intensity.The main components of the dissolved PAHs in Changhe River were the 3 ring and 4 ring components of PAHs,and the 2 ring components of PAHs had the lowest proportion.The concentration of ∑16PAHs in the sediment was significantly higher than that in riverside soil.The concentration of ∑16PAHs in the sediment was 229.2 μg · kg-1,and in riverside soil it was 185.6 μg · kg-1,which was lower than that in most domestic and overseas watershed.