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Charge mediated interaction of polystyrene nanoplastic (PSNP) with minerals in aqueous phase.
Water Research ( IF 11.4 ) Pub Date : 2020-04-27 , DOI: 10.1016/j.watres.2020.115861 Yangyang Zhang 1 , Yuanyuan Luo 1 , Xuetao Guo 2 , Tianjiao Xia 2 , Tiecheng Wang 2 , Hanzhong Jia 2 , Lingyan Zhu 2
Water Research ( IF 11.4 ) Pub Date : 2020-04-27 , DOI: 10.1016/j.watres.2020.115861 Yangyang Zhang 1 , Yuanyuan Luo 1 , Xuetao Guo 2 , Tianjiao Xia 2 , Tiecheng Wang 2 , Hanzhong Jia 2 , Lingyan Zhu 2
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A large number of plastic products potentially become smaller particles, including nanoplastics, under multiple actions in the environment. The interactions between nanoplastic particles and constituents in the environment, such as minerals, would greatly affect the transport, fate and toxic effects of nanoplastics. In this study, the interactions of polystyrene nanoplastic (PSNP) with four typical minerals, including goethite, magnetite, kaolinite and montmorillonite, in aqueous phase were investigated. The stability of PSNP colloidal suspension decreased in the presence of the positively charged goethite or magnetite, while it was not affected by the negatively charged montmorillonite and kaolinite, suggesting that there was a strong electrostatic attraction between PSNP and the two iron oxides. Incubation of PSNP with other three metal oxides with different surface charges, MnO2, Al2O3 and SiO2, confirmed the importance of electrostatic interaction in the stability of PSNP suspension. The transmission electron microscopy (TEM) analysis and batch adsorption experiments indicated that PSNP was effectively adsorbed on goethite or magnetite due to the strong electrostatic attraction between them. The Fourier transform infrared spectra (FTIR) and two-dimensional correlation spectroscopy (2D-COS) analyses indicated that there was strong hydrogen bonding between the -OH (γ-FeOOH) of goethite and PSNP, contributing to the higher adsorption of PSNP on goethite than magnetite. These findings shed light on the interactions of PSNP with mineral surfaces, and potential fate of PSNP under natural conditions in the water environment.
中文翻译：
电荷介导的聚苯乙烯纳米塑料（PSNP）与水相矿物的相互作用。
在环境中的多种作用下，许多塑料产品可能会变成较小的颗粒，包括纳米塑料。纳米塑料颗粒与环境成分（例如矿物质）之间的相互作用将极大地影响纳米塑料的运输，命运和毒性作用。在这项研究中，研究了聚苯乙烯纳米塑料（PSNP）与四种典型矿物，包括针铁矿，磁铁矿，高岭石和蒙脱石在水相中的相互作用。在带正电的针铁矿或磁铁矿的存在下，PSNP胶体悬浮液的稳定性下降，而不受带负电的蒙脱石和高岭石的影响，这表明PSNP和两种氧化铁之间有很强的静电吸引。将PSNP与其他三种具有不同表面电荷的金属氧化物MnO2，Al2O3和SiO2一起孵育，证实了静电相互作用对PSNP悬浮液稳定性的重要性。透射电子显微镜（TEM）分析和分批吸附实验表明，PSNP由于针状体或磁铁矿之间的强静电吸引而被有效地吸附。傅立叶变换红外光谱（FTIR）和二维相关光谱（2D-COS）分析表明，针铁矿的-OH（γ-FeOOH）与PSNP之间存在强氢键，有助于PSNP在针铁矿上的更高吸附比磁铁矿 这些发现揭示了PSNP与矿物表面的相互作用，以及在水环境中自然条件下PSNP的潜在命运。
更新日期：2020-04-27
中文翻译：
电荷介导的聚苯乙烯纳米塑料（PSNP）与水相矿物的相互作用。
在环境中的多种作用下，许多塑料产品可能会变成较小的颗粒，包括纳米塑料。纳米塑料颗粒与环境成分（例如矿物质）之间的相互作用将极大地影响纳米塑料的运输，命运和毒性作用。在这项研究中，研究了聚苯乙烯纳米塑料（PSNP）与四种典型矿物，包括针铁矿，磁铁矿，高岭石和蒙脱石在水相中的相互作用。在带正电的针铁矿或磁铁矿的存在下，PSNP胶体悬浮液的稳定性下降，而不受带负电的蒙脱石和高岭石的影响，这表明PSNP和两种氧化铁之间有很强的静电吸引。将PSNP与其他三种具有不同表面电荷的金属氧化物MnO2，Al2O3和SiO2一起孵育，证实了静电相互作用对PSNP悬浮液稳定性的重要性。透射电子显微镜（TEM）分析和分批吸附实验表明，PSNP由于针状体或磁铁矿之间的强静电吸引而被有效地吸附。傅立叶变换红外光谱（FTIR）和二维相关光谱（2D-COS）分析表明，针铁矿的-OH（γ-FeOOH）与PSNP之间存在强氢键，有助于PSNP在针铁矿上的更高吸附比磁铁矿 这些发现揭示了PSNP与矿物表面的相互作用，以及在水环境中自然条件下PSNP的潜在命运。
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