摘要
采用包括填料表面微观特征、元素构成、吸附性能、微生物附着生长性、经济性等因素的填料性能评价方法,对处理含油地表水的潜流湿地填料进行评价与筛选.静态吸附试验表明,各种填料对磷的吸附能力为炉渣>陶粒>沸石>砾石>砖块>卵石,对石油类的吸附能力为炉渣>陶粒>砖块>沸石>砾石>卵石;动态吸附试验表明,各种填料床对石油类的去除效果为炉渣床>砾石床>湖泊底泥床;放置在污染水体中的填料表面微生物总数和烃降解菌数量为砖块>沸石>砾石,陶粒和炉渣>卵石.根据上述评价结果,选择总体性能较好的砾石、炉渣、砖块和沸石作为潜流湿地现场试验系统的填料.
Different media were selected and tested in a subsurface constructed wetland used to treat oil polluted water and a performance estimation system was established considering a series of factors such as the microscopic characteristics of the material, the elemental composition, sorption, biomass of media and cost. The results of static adsorption tests showed that slag had the best ability to absorb P and oil. The sequence of phosphorus sorption ability from highest to lowest was slag 〉 ceramisite 〉 zeolite 〉 gravel 〉 brick 〉 scree. And the sequence for oil sorption was slag 〉 ceramisite 〉 brick 〉 zeolite 〉 gravel 〉 scree. A dynamic pilot system was built to estimate oil-pollutant removal efficiencies using three kinds of media (slag, gravel and lake bottom sediment) and the slag bed behaved best. From tests on all the media, the greatest number of microorganisms and oil-degrading bacteria were found on the surface of brick, thus it was suitable for biodegradation. According to the performance estimates, gravel, slag, brick and zeolite are appropriate choices for constructing subsurface constructed wetlands.
出处
《环境科学学报》
CAS
CSCD
北大核心
2007年第7期1121-1126,共6页
Acta Scientiae Circumstantiae
基金
国家高技术研究发展计划(863)项目(No.2003AA601090)~~
关键词
潜流湿地
填料
石油类
吸附性能
微生物
subsurface constructed wetland
media
oil
sorption performance
microorganism