Wang Tao, Liu Tingfeng, Sun Cheng
State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210093, PR China.
Waste Manag. 2008;28(10):1977-82. doi: 10.1016/j.wasman.2007.06.025. Epub 2007 Sep 18.
This study evaluated the feasibility of using municipal solid waste incinerator (MSWI) fly ash as acid soil amendment. In particular, changes in soil physicochemical properties and the potential environmental problems caused by the application of MSWI fly ash were investigated. The results showed that application of MSWI fly ash to the acid soil could raise the soil pH. The contents of rapidly available P and K, and slowly available K in the amended soil had a linear relationship with the addition ratio of MSWI fly ash. An addition of less than 20% of MSWI could raise the soil respiratory intensity after incubation for 3-5 days. Application of MSWI fly ash to the soil increased its content of water soluble salts and heavy metals, which could cause phytotoxicity in the plants. Therefore, the addition of MSWI fly ash to the soil should not be excessive, and less than 5-10% is an advisable addition level depending on the acidity of the soil and the plants growing on it.
本研究评估了使用城市固体废物焚烧炉（MSWI）飞灰作为酸性土壤改良剂的可行性。具体而言，研究了土壤理化性质的变化以及施用MSWI飞灰所引起的潜在环境问题。结果表明，将MSWI飞灰施用于酸性土壤可提高土壤pH值。改良土壤中速效磷、速效钾和缓效钾的含量与MSWI飞灰的添加比例呈线性关系。添加量小于20%的MSWI飞灰在培养3至5天后可提高土壤呼吸强度。将MSWI飞灰施用于土壤会增加其水溶性盐和重金属的含量，这可能对植物产生毒害作用。因此，向土壤中添加MSWI飞灰不应过量，根据土壤酸度和其上生长的植物，添加量小于5-10%是一个可取的添加水平。
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