摘要
土壤中的多环芳烃(polycyclic aromatic hydrocarbons,PAHs)作为一类具有“三致”效应的疏水性有机污染物,能在土壤中长时间稳定的存在并且很难被降解。PAHs的环境行为取决于它们与土壤不同组分之间的相互作用,作为土壤中根系分泌物主要组分的小分子有机酸(low molecular weight organic acids,LMWOAs)能通过对土壤环境的影响进而影响PAHs的环境行为。综述了LMWOAs对土壤中PAHs吸附-解吸和“老化”等环境行为的影响,讨论了LMWOAs通过对土壤有机质、土壤结构及土壤微生物等的作用而影响PAHs的环境行为。通过综述该领域近年的研究成果,指出了现有研究中的不足,并展望了今后的研究趋势,有利于推动对PAHs污染土壤的有效治理。
As a group of hydrophobic organic pollutants with″three genicity″effects,Polycyclic aromatic hydrocarbons(PAHs)in soil can exist steadily for a long time and are difficult to be degraded.The environmental behavior of PAHs depends on their interaction with different soil components.Low-molecular-weight organic acids(LMWOAs),as the main components of root exudate in soil,can affect the environmental behavior of PAHs by influencing the soil environment.The effects of low-molecular-weight organic acids(LMWOAs)on the environmental behaviors of PAHs in soil such as adsorption-desorption,and aging were reviewed.LMWOAs affecting the environmental behaviors of PAHs through their effects on soil organic matter,soil structure and soil microorganisms were discussed.By summarizing the research achievements in this field in recent years,the deficiencies of the existing research were pointed out and the research trend in the future was forecasted,which would be helpful to promote the effective treatment of PAHs contaminated soil.
作者
袁月
YUAN Yue(Cultivation Base of State Key Laboratory of Humid Subtropical Mountain Ecology,Fujian Normal University, Fuzhou, Fujian 350007, China;School of GeographicalScience, Fujian Normal University, Fuzhou, Fujian 350007, China)
出处
《福建农业科技》
2020年第10期62-69,共8页
Fujian Agricultural Science and Technology
关键词
小分子有机酸
多环芳烃
土壤有机质
土壤结构
土壤微生物
Low-molecular-weight organic acids
Polycyclic aromatic hydrocarbons
Soil organic matter
Soil structure
Soil microorganism
