农林生物质热解过程中生成气溶胶的人体细胞毒性研究进展

Research Progress on Human Cytotoxicity of Aerosol Formed During the Pyrolysis of Agroforestry Biomass

农林生物质作为潜在的能源物质,对其固体残留物进行简单处理后可用于能源供应、土壤改良及污染控制,具有较大的经济与环境利用价值。然而,研究表明农林生物质在热解时生成和释放的气溶胶中含有重金属、环境持久性自由基(EPFRs)、多环芳烃(PAHs)、硫氧化物(SO X)、焦油、颗粒物等物质,这些物质与人体接触或被吸入后会通过氧化应激及与生物大分子形成加合物等途径对人体多组织细胞造成损伤,进而威胁人体健康。大量的回收和不当处置农林生物质残渣也会对作业人员产生不可逆的伤害。因此,本文综述了农林生物质热解生成气溶胶的毒性机制,系统梳理了不同种类的农林生物质及热解条件对生成的气溶胶组分的影响,重点关注颗粒物粒径及颗粒物吸附的污染物对气溶胶毒性的贡献,以期对未来农林生物质的科学应用及控制提供理论基础。

As a potential energy material,agroforestry biomass can be used for energy supply,soil improvement and pollution control after simple treatments of its solid residues.This endows agroforestry biomass with great economic and environmental utilization value.However,some stu-dies show that aerosols may contain heavy metals,environmental persistent free radicals(EPFRs),polycyclic aromatic hydrocarbons(PAHs),sulfur oxides(SO X),tar,particulate matter and other substances during pyrolysis of agroforestry biomass.After contacting or being inhaled by human body,the above substances will cause damage to human cells or tissues through oxidative stresses and the formation of adducts with biological macro-molecules,and then threaten human health.A large number of recycling and improper disposal of agroforestry biomass residues will also cause irreversible damage to operators.Therefore,this paper summarizes the toxicity mechanism of aerosols generate by pyrolysis of agroforestry biomass,systematically investigates the effects of different types of agroforestry biomass under various pyrolysis conditions on the components of aerosols,and focuses on the contributions.The findings will provide a theoretical basis for the scientific application and control of agrofo-restry biomass in the near future.