Hu Baiyang, Li Yanxia, Jiang Linshu, Chen Xingcai, Wang Lin, An Siyu, Zhang Fengsong
State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, 100875 Beijing, China.
State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, 100875 Beijing, China.
J Hazard Mater. 2020 Dec 5;400:123325. doi: 10.1016/j.jhazmat.2020.123325. Epub 2020 Jun 26.
High levels of steroid estrogens are continuously detected in the soil environment, and even the concentration in vegetables and fruits has reached levels that have an impact on children's health, which has attracted growing attention. Moreover, microplastics (MPs) in the soil system are also of increasing concern worldwide. The effects of MPs on the adsorption of organic pollutants in soil systems, however, remain largely unexplored. In this study, MPs common in greenhouse vegetable soil (polyethylene, polyvinyl chloride and polystyrene) were selected to investigate the effect of MPs occurrence on the adsorption of 17β‑estradiol (E2) in soil under various conditions. The experimental results showed that the adsorption capacity of MPs to E2 is stronger than that of soil. Moreover, the occurrence of MPs in soil increased the adsorption capacity for E2, and the addition amount and aging of MPs enhanced the promotion effect. This enhancement indicated that the input of MPs into soil might reduce the mobility of E2 by improving the adsorption capacity of the soil. These results deepen the understanding of the adsorption behavior of E2 in the coexisting system of MPs and soil and provide a theoretical basis for E2 pollution control.
在土壤环境中持续检测到高浓度的类固醇雌激素，甚至蔬菜和水果中的浓度已达到对儿童健康产生影响的水平，这引起了越来越多的关注。此外，土壤系统中的微塑料（MPs）在全球范围内也日益受到关注。然而，MPs对土壤系统中有机污染物吸附的影响在很大程度上仍未得到充分研究。在本研究中，选择了温室蔬菜土壤中常见的MPs（聚乙烯、聚氯乙烯和聚苯乙烯）来研究不同条件下MPs的存在对土壤中17β-雌二醇（E2）吸附的影响。实验结果表明，MPs对E2的吸附能力强于土壤。此外，土壤中MPs的存在增加了对E2的吸附能力，MPs的添加量和老化增强了促进作用。这种增强表明，MPs输入土壤可能通过提高土壤的吸附能力来降低E2的迁移性。这些结果加深了对E2在MPs与土壤共存体系中吸附行为的理解，并为E2污染控制提供了理论依据。
