Polystyrene-based nanospheres with controllable microstructures for exceptional solid phase microextraction of organic pollutants
Polystyrene-based nanospheres with controllable microstructures for exceptional solid phase microextraction of organic pollutants
复制标题
具有可控微观结构的聚苯乙烯基纳米球，用于有机污染物的出色固相微萃取
DOI：
10.1016/j.cej.2021.132527
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发表时间：
2021-09-25
影响因子：
15.1
通讯作者：
Ouyang, Gangfeng
中科院分区：
文献类型：
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作者：
Chen, Luyi;Huang, Junlong;Ouyang, Gangfeng
系统研究聚苯乙烯基纳米微球对持久性有机污染物（POPs）的吸附性能，对于设计高容量吸附剂和进行纳米塑料的毒理学风险评价具有重要意义。本研究采用乳液聚合、超交联和直接碳化等方法，成功地制备了一系列微观结构可控的聚苯乙烯基纳米球作为模型吸附剂。以苯系物、多环芳烃（PAHs）和多氯联苯（PCBs）为目标吸附物，研究了固相微萃取（SPME）涂层中微结构对构建纳米微球吸附性能的影响.此外，令人惊讶地发现，接枝的F原子使PS对PCB表现出比Cl原子更好的富集效果，这主要是由于F原子与PCB之间更强的sigma（sigma）-空穴相互作用。考虑到最突出的性能，F-功能化的纳米球（xFFNs）涂层的SPME纤维被用于富集多氯联苯从水样中，富集因子范围从1500到10030。将xFFNs涂层光纤与气相色谱-质谱（GC-MS）联用后，建立了高灵敏度的分析方法，检出限为0.08-0.89 ng L-1，实现了处理后污水样品中痕量PCBs的精确定量。
Systematic investigation on the adsorption performance of polystyrene-based nanospheres towards persistent organic pollutants (POPs) is of great importance to the design of high-capacity adsorbent and the toxicological risk assessment of nano plastic. In this study, a series of polystyrene-based nanospheres with controllable mi-crostructures, have been constructed successfully as model adsorbents, by the strategies of emulsion polymeri-zation, hyper-crosslinking and direct carbonization. In the form of Solid phase microextraction (SPME) coatings, the impacts of microstructures on the adsorption performance of constructed nanospheres have been highlighted, by employing benzene series, polycyclic aromatic hydrocarbons (PAHs) and polychlorinated biphenyls (PCBs) as target adsorbates. Moreover, it is surprisingly found that the grafted F atoms make PS demonstrate better enrichment effects towards PCBs than the Cl atoms, mainly due to stronger sigma (sigma)-hole interactions between F atoms and PCBs. In consideration of the most outstanding performance, the F-functionalized nanospheres (xFFNs)-coated SPME fiber is employed for the enrichment of PCBs from water samples, and the enrichment factors range from 1500 to 10030. After coupling the xFFNs-coated fiber with gas chromatography-mass spectrometry (GC-MS), highly sensitive analytical method is developed with detection limits of 0.08-0.89 ng L-1, realizing precise quantifications of trace PCBs in treated sewage samples.