矿化垃圾基本理化性状剖面变化特征研究
Profile characteristics in physical and chemical properties of aged-refuse
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摘要: 矿化垃圾能否作为农业资源被重新利用，除应考虑有效植物营养物质的含量与是否存在有害物质外，还取决于其基本理化性状。对城市生活垃圾填埋场中经填埋6年、8年、10年后得到的矿化垃圾基本物化性状变化特征进行分析，结果表明：矿化垃圾的土粒密度显著小于对照土壤，交换性盐基总量、CEC显著大于对照土壤，pH值和对照土壤基本相当；表层（0～50 cm）矿化垃圾的土粒密度、CEC、交换性盐基总量、pH值的变化幅度依次大于中层（50～100 cm）和下层(100～150 cm）；矿化垃圾的理化性状在填埋8～10年后总体趋于稳定。从植物生长的环境角度看，填埋8～10年后的矿化垃圾可以开采后作为植物生长基质、土壤改良剂等农业资源化利用。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 agedrefuse 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 agedrefuse 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.
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Key words:
- physical and chemical properties /
- aged refuse /
- long-term landfill /
- characteristics
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