Profile characteristics in physical and chemical properties of aged-refuse

Key words: 
• physical and chemical properties /
• aged refuse /
• long-term landfill /
• characteristics

Abstract: The potential use of the aged refuse in agriculture largely depends on the concentration of available plant nutrients and its basic physical and chemical properties. The aged refuse was excavated after the municipal solid waste landfilled for 6 to10 years, and the profile characteristics of the basic physical and chemical properties of the agedrefuse were investigated. Results showed that the soil density of the aged refuse was smaller than that of the soil, but the total amount of exchangeable base and CEC were higher than those of the soil. There was no significant difference between pH values of the aged refuse and soil. The variation of soil density, CEC, total amount of exchangeable base and pH in the surface layer (0～50 cm) of agedrefuse was larger than that in the middle layer(50～100 cm) and water layer(100～150 cm). The physical and chemical properties of aged refuse tended to be stable after 8～10 years landfill, which indicated that the aged refuse can be recycled after 8～10 years landfill and used as soil amendment and substrate for plant growth.