摘要
为控制滇池流域暴雨径流污染,研究沸石内部孔隙结构,利用沸石对氨氮的吸附作用和物化、生物作用,构建以沸石为填料的人工湿地系统。试验运行结果表明,对暴雨水中NH+4-N平均去除率85%以上,去除机理主要是沸石对NH+4-N的选择吸附作用;对NO-3-N去除主要以反硝化作用去除为主,并且碳源量制约系统去除NO-3-N能力。植物可提高系统除氮率5%左右。该系统停留时间短、能高效去除溶解性氮,对高负荷暴雨径流污染有明显的去除效果。
A zeolite system was built and operated insitu to reduce nitrogen levels in stormwater run off in the Dianchi watershed. The internal zeolite structure was measured with an electron microscope. The zeolite was used as filling that could quickly and efficiently remove soluble nitrogen. The high efficiency was due not only to the selective zeolite absorption, but also to physical chemical and biological purification in the system. The results showed that the system could quickly remove ammonianitrogen with an average removal rate of about 85% through the selective absorption of the zeolite. The nitratenitrogen removal was mainly due to denitrification by microorganisms. The organic carbon content strongly affected the system nitratenitrogen removal efficiency. Plants could also duectly adsorb the nitratenitrogen which could increase the removal rate by about 5%.
出处
《清华大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2003年第6期854-857,共4页
Journal of Tsinghua University(Science and Technology)
基金
国家重大科技项目"滇池流域面源污染控制技术"(k99-05-35-02)
