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为了加强对城市雨水的处理，提出了将生物炭添加于生物滞留池填料土，以黄松木为原料，在550℃条件下制备生物炭，分析生物炭对生物滞留池填料土的理化性质和雨水中氨氮吸附能力的影响;测量了对照填料土和添加了4%生物炭的改良填料土在一巧300 } 0 cmHZ O土壤水吸力范围的水分特征曲线;采用圆盘人渗仪和DISC软件测算了田间生物滞留池对照和改良填料土的导水率.结果表明，生物炭的施用提高了酸性填料土的pH，降低了填料土容重达7}，增加了总孔隙率约28，增大了阳离子交换量达33;施用生物炭后，填料土对氨氮的去除率从一26%一28%提高到50%一90;生物炭的施用使填料土有效水含量从0. 016 cm3/m一，提高到0.063 cm3/m一，，饱和导水率增大了1.5倍;生物炭可从水质和水量两方面提高生物滞留池对城市雨水中氨氮的去除，并有助于城市雨洪控制.
In order to strengthen the treatment of urban rainwater, biochar was proposed to be added to the bio-retaining pool filler soil, and yellow pine wood was used as raw material to prepare biochar at 550 ℃. The physical and chemical properties of bio- The effect of ammonia nitrogen adsorption capacity was measured. The water characteristic curves of the control paddy soil and the modified paddy soil supplemented with 4% biochar in a water suction range of 300 cmHZ0 soil were measured. Disc permeability meter and DISC software were used to calculate The results showed that the application of biochar increased the pH of acid-filled soil, reduced the weight of soil, and increased the total porosity by about 28% Cation exchange capacity of 33; after the application of biochar, filler soil ammonia nitrogen removal rate from 26% to 28% to 50% to 90%; biochar application filler soil effective water content from 0. 016 cm3 / m a , Increased to 0.063 cm3 / m, and the saturated hydraulic conductivity increased by 1.5 times. Biochar can improve the removal of ammonia nitrogen in urban stormwater from biological and biogas reservoirs and contribute to urban storm flood control.