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Efficiencies of multilayer infiltration systems for the removal of urban runoff pollutants

机译:多层渗透系统去除城市径流污染物的效率

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Current rates of urban development will result in water runoff becoming a major complication of urban water pollution. To address the worsening situation regarding water resource shortage and pollution, novel multilayer infiltration systems were designed and their effectiveness for removing pollutants in urban runoff tested experimentally. The multilayer infiltration systems effectively removed most pollutants, including organic matter (chemical oxygen demand (COD_(Cr))), total nitrogen (TN), ammonia-nitrogen (NH_4 ~+-N) and total phosphorus (TP). COD_(Cr), TN, NH _4 ~+-N, and TP were reduced by 68.67, 23.98, 82.66 and 92.11%, respectively. The main mechanism for nitrogen removal was biological nitrogen removal through nitrification and denitrification. Phosphorus in the urban runoff was removed mainly by fixation processes in the soil, such as adsorption and chemical precipitation. The results indicate that the proposed novel system has potential for removal of pollutants from urban runoff and subsequent reuse of the treated water.
机译:当前城市发展速度将导致径流成为城市水污染的主要复杂因素。为了解决水资源短缺和污染日益恶化的情况,设计了新型多层渗透系统,并通过实验测试了其在城市径流中去除污染物的有效性。多层渗透系统有效去除了大多数污染物,包括有机物(化学需氧量(COD_(Cr)),总氮(TN),氨氮(NH_4〜+ -N)和总磷(TP)。 COD_(Cr),TN,NH_4〜+ -N和TP分别降低了68.67%,23.98、82.66和92.11%。脱氮的主要机理是通过硝化和反硝化去除生物氮。城市径流中的磷主要通过固定在土壤中的过程除去,例如吸附和化学沉淀。结果表明,所提出的新系统具有从城市径流中去除污染物并随后再利用已处理水的潜力。

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