当前位置: X-MOL 学术Environ. Sci. Pollut. Res. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Comparative study of the influence of linear and branched alkyltrichlorosilanes on the removal efficiency of polyethylene and polypropylene-based microplastic particles from water.
Environmental Science and Pollution Research ( IF 5.8 ) Pub Date : 2020-01-17 , DOI: 10.1007/s11356-020-07712-9
Michael Toni Sturm 1, 2 , Adrian Frank Herbort 1, 3 , Harald Horn 2, 4 , Katrin Schuhen 1
Affiliation  

Microplastics are a global environmental pollution. Due to this fact, new solutions are needed to reduce the amount in various aquatic environments. A new concept introduced by Herbort and Schuhen from the year 2016 describes the agglomeration of microplastics in water using silicon-based precursors. In the study presented here, alkyltrichlorosilanes with different linear and branched alkyl groups and a chain length between 1 and 18 carbon (C-) atoms are investigated for their suitability to fix microplastics (mixtures of polyethylene (PE) and polypropylene (PP)) and to form larger agglomerates. As the alkyl group has a major influence on the reaction rate and agglomeration behavior, we present here the extensive data collection of the evaluation of the best case. The removal efficiency is determined gravimetrically. The reaction behavior and the fixation process are characterized by hydrolysis kinetics. 29Si-MAS-NMR spectroscopy, IR spectroscopy, and thermogravimetry (TGA) are used to characterize the chemical composition of the agglomerates. Finally, the use of optical coherence tomography (OCT) allows the visualization of the formed agglomerates. The results show that the different alkyl groups have a strong impact on the suitability of the alkyltrichlorosilanes for the agglomeration, as they influence the hydrolysis and condensation kinetics in water and the affinity to the microplastics. Best suited for microplastic removal were intermediate chain length between 3 and 5 C-atoms.

中文翻译:

直链和支链烷基三氯硅烷对聚乙烯和聚丙烯基微塑料颗粒从水中去除效率影响的比较研究。

微塑料是全球环境污染。由于这个事实,需要新的解决方案来减少各种水生环境中的数量。Herbort和Schuhen在2016年提出了一个新概念,描述了使用硅基前体在水中形成微塑料的过程。在本文介绍的研究中,研究了具有不同直链和支链烷基且链长在1至18个碳(C-)原子之间的烷基三氯硅烷对固定微塑料(聚乙烯(PE)和聚丙烯(PP)的混合物)的适用性。形成更大的团块。由于烷基对反应速率和附聚行为有重要影响,因此我们在此处介绍了对最佳情况进行评估的大量数据。去除效率通过重量法确定。反应行为和固定过程的特征在于水解动力学。29Si-MAS-NMR光谱,IR光谱和热重分析(TGA)用于表征团聚体的化学组成。最后,使用光学相干断层扫描(OCT)可以可视化所形成的团块。结果表明,不同的烷基对烷基三氯硅烷的团聚适应性有很大影响,因为它们会影响水中的水解和缩合动力学以及对微塑料的亲和力。最适合微塑料去除的是3至5个C原子之间的中间链长度。热重法(TGA)用于表征团聚体的化学组成。最后,使用光学相干断层扫描(OCT)可以可视化所形成的团块。结果表明,不同的烷基对烷基三氯硅烷的团聚适应性有很大影响,因为它们会影响水中的水解和缩合动力学以及对微塑料的亲和力。最适合微塑料去除的是3至5个C原子之间的中间链长度。热重法(TGA)用于表征团聚体的化学组成。最后,使用光学相干断层扫描(OCT)可以可视化所形成的团块。结果表明,不同的烷基对烷基三氯硅烷的团聚适应性有很大影响,因为它们会影响水中的水解和缩合动力学以及对微塑料的亲和力。最适合微塑料去除的是3至5个C原子之间的中间链长度。因为它们会影响水中的水解和缩合动力学以及对微塑料的亲和力。最适合微塑料去除的是3至5个C原子之间的中间链长度。因为它们会影响水中的水解和缩合动力学以及对微塑料的亲和力。最适合微塑料去除的是3至5个C原子之间的中间链长度。
更新日期:2020-01-17
down
wechat
bug