Application of MSWI fly ash on acid soil and its effect on the environment.
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.
Wang
Tao
T
State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210093, PR China.
Liu
Tingfeng
T
Sun
Cheng
C
D002244:Carbon / Q000737:chemistry*; D060729:Coal Ash; D017753:Ecosystem; D005308:Fertilizers; D006863:Hydrogen-Ion Concentration; D017745:Incineration; D019216:Metals, Heavy / Q000032:analysis; D052638:Particulate Matter / Q000737:chemistry*; D010758:Phosphorus / Q000032:analysis*; D011188:Potassium / Q000032:analysis*; D012492:Salts / Q000032:analysis; D012987:Soil / Q000032:analysis*
D060729:Coal Ash; D005308:Fertilizers; D019216:Metals, Heavy; D052638:Particulate Matter; D012492:Salts; D012987:Soil; D010758:Phosphorus; D002244:Carbon; D011188:Potassium