摘要
选择聚氯乙烯(PVC)和聚乙烯(PE)为代表性微塑料,探究了微塑料与肺表面活性物质(LS)间的相互作用机制.结果表明,PVC和PE对LS活性组分具有显著的吸附作用,其对磷脂组分的吸附率可分别达到49.33%和47.00%,从而造成LS表面张力的升高和表面压力-表面积等温线(π-A)的内缩.与LS接触后,微塑料的表面形貌和Zeta电位也发生了变化,PVC和PE的Zeta电位绝对值分别降低了5.61和5.20mV,进一步影响了微塑料的分散状态和沉降能力.因此,当微塑料通过呼吸系统进入肺部环境时,其不仅能造成LS界面化学性质的显著变化,其自身性质也受到影响,可能诱导更严重的健康危害.
Polyvinyl chloride(PVC)and polyethylene(PE)were selected as the representatives of microplastics to investigate the interaction between microplastics and lung surfactant(LS).The results demonstrated that PVC and PE could adsorb the active components of LS,and their adsorption rates towards phospholipid components reached 49.33%and 47.00%,respectively,which resulted in the increase of surface tension and the inward contraction of the surface pressure area isotherm(π-A)of LS.After interaction with LS,the surface morphology and zeta potential of microplastics were also changed.The absolute values of zeta potential of PVC and PE decreased by 5.61mV and 5.20mV,respectively,which further affected the dispersion state and settling performance of microplastics.Therefore,when microplastics enter the lung environment through the respiratory system,they can not only change the chemical properties of the LS interface,but also affect their own properties,possibly inducing more serious health hazards.
作者
蒋凡殊
曹妍
张林丰
师伟萌
宋浩然
王浩骏
杨艳琳
赵群
李杰
李曼焘
JIANG Fan-shu;CAO Yan;ZHANG Lin-feng;SHI Wei-meng;SONG Hao-ran;WANG Hao-jun;YANG Yan-lin;ZHAO Qun;LI Jie;LI Man-tao(Faculty of Environmental Science and Engineering,Kunming University of Science and Technology,Kunming 650500,China)
出处
《中国环境科学》
EI
CAS
CSCD
北大核心
2024年第1期474-481,共8页
China Environmental Science
基金
国家自然科学基金资助项目(22366024)。
关键词
微塑料
肺表面活性物质
界面性质
肺健康
microplastics
lung surfactant
interfacial properties
lung health
