【摘要】 选择长深高速公路滨州至大高段作为研究路段,重点考察了高速公路路面颗粒物粒径分布及其对重金属的吸附特性。在研究路段内选取9个取样区块、取样6次,共获得54个颗粒物样品。分析结果表明:大粒径(>250μm)颗粒占颗粒物总量的76.23%,是高速公路路面颗粒物中的主要组分;小粒径(<250μm)颗粒对重金属的吸附性强于大粒径颗粒,但由于大粒径颗粒所占比例较大,其对吸附重金属的贡献达到了60%以上;颗粒物中重金属的溶出率受酸度影响显著,降水酸度会影响重金属的溶出率,从而影响路面径流水质。更多还原

【Abstract】 The characteristics of particle matter size distribution and adsorption of heavy metals were investigated through the analysis of 54 samples at 9 points of the section from Binzhou to Dagao of Changshen Highway. The results indicated that the particle matters greater than 250 μm were the main components of particle matters on highway surface,accounting for 76. 23% of the total. The adsorptive capacity of smaller particles( < 250 μm) was higher than that of bigger particles( > 250 μm). However,the amount of heavy metals adsorbed by bigger particles was more than 60% due to their high proportion. The dissolution rate of heavy metals was affected by acidity due to rainfall,which in turn had an effect on highway runoff water quality.更多还原