工程纳米颗粒对土壤中共存污染物环境归趋的影响

Effect of Engineered Nanoparticles on the Environmental Fate of Coexisting Pollutants in Agricultural Soils

随着工程纳米材料在现代农业和土壤修复中的广泛应用,工程纳米颗粒在土壤环境中的累积风险受到越来越多的关注.工程纳米颗粒不仅会影响土壤微生物群落结构、酶活性和植物生理,还可以直接或间接的影响土壤中共存污染物的环境归趋.本文综述了工程纳米颗粒对土壤中共存的重金属的形态、重金属和有机污染物的迁移性、对土壤作物吸收转运重金属和有机污染物以及有机污染物生物化学转化等过程的影响.归纳了工程纳米颗粒对共存污染物环境归趋的影响机制.

With the application of engineered nanoparticles( ENPs) on modern agriculture and soil remediation,the accumulated ecological risk of ENPs in agricultural soils has been receiving increasing concerns. ENPs can not only shift soil microbial community,enzyme activity,and plant physiology,but also influence,directly or indirectly,the environmental fate of coexisting pollutants. This review summarized the status quo of the literature regarding the comprehensive effects of ENPs on heavy metal ion speciation,the transportation of heavy metal ion and organic pollutants in soil and crops,and the biochemical transformation of organic pollutants. Meanwhile,proposed was the possible pathways through which the effects occur.