【摘要】 研究采用不同渗滤介质构建人工渗滤系统处理公路雨水径流,跟踪测定处理后雨水中主要污染物的去除率。结果表明,不同渗滤介质的人工土柱对径流污染物均具有较好的净化效果,并表现出良好的耐冲击负荷能力。化学耗氧量的去除率大多在60%～80%;游离态氨去除率大都在40%~80%,总氮去除率基本在40%～60%;所有试验土柱对总磷的去除作用都极为明显,出水中磷含量较低,出水磷浓度最高值为0.112 mg/L,最低仅为0.050 mg/L。各试验土柱对路面雨水径流中的浊度去除率都在90%以上;重金属出水浓度均达到了Ⅱ类水体水质标准。在相关渗滤介质中,木屑的吸附性能最好,原状土自身具有较好吸附能力,栽培介质由于自身含有一定的游离态氨,吸附效果较差,不宜直接作为绿地渗滤层的改良材料。更多还原

【Abstract】 Different infiltration system constructed with different media was designed;and their long-term purification effect of rainwater runoff was monitored.The results showed that the artificial infiltration system with different media could remove pollutants from rainwater runoff efficiently;and the systems had powerful resistance to shock load.CODCr removing rate was 60%~80%;NH4+-N removing rate was 40%~80%;and TN removing rate was 40%~60%;TP could be removed significantly and the concentration in effluent was 0.050~0.112 mg/L;turbidity removing rate was over 90% by all the treatments.The concentration of heavy metals in effluent met class Ⅱ of quality standard for surface water.Among all evaluated mediums,wood crumbs performed the best absorption ability.The native soil itself had good NH4+ adsorption ability;however,the cultivation medium performed bad or even released NH4+-N due to the NH4+ containing in,thus was not a good choice for infiltration medium.更多还原