生物质灰理化特性及其应用于土壤改良的研究进展

Review on the physicochemical properties of biomass ash and its application in soil amelioration and remediation

为拓展生物质灰在土壤环境修复中的应用,比较了12种生物质灰的来源与理化特性,分析了不同熔点下生物质灰中灰粒的微观形态、多孔结构与化学组成异同特征。基于灰分理化特性,论述了不同类别生物质灰对土壤改良的机理与应用优势。分析认为:受生物质原料来源多样和燃烧熔点的影响,生物质灰化学组成和结构呈现多样性;生物质灰对土壤的改良作用包括土壤物理结构改善、团聚体稳定性增强、酸性土壤性质改善、溶液离子含量提高、土壤重金属钝化和植物生长促进。

In order to explore the application of biomass ash in soil amelioration and remediation,the sources and physicochemical properties of 12 kinds of biomass ash were compared,and the similarities and differences of microscopic morphology,porous structure and chemical composition of biomass ash particles at different melting point were analyzed. According to the physicochemical properties of ash particles,the mechanism of soil amelioration and the advantages of different kinds of biomass ash were discussed.It was concluded that the chemical composition and porous structure of biomass ash were diverse because of different sources and melting points.Soil amelioration was achieved through improving the physical structure of soil,the stability of soil aggregates,the properties of acid soil and the content of ions,as well as heavy metal passivation and plant growth promotion.