State Key Laboratory of Heavy Oil Processing, State Key Laboratory of Petroleum Pollution Control, China University of Petroleum (Beijing), Beijing, 102249, China.
State Key Laboratory of Heavy Oil Processing, State Key Laboratory of Petroleum Pollution Control, China University of Petroleum (Beijing), Beijing, 102249, China.
Chemosphere. 2020 Jan;238:124621. doi: 10.1016/j.chemosphere.2019.124621. Epub 2019 Aug 20.
Present study prepared a new magnetic and thermo dual-responsive core-shell nanomaterial (Fe@SiO@poly(N-isopropylacrymide-co-methacrylic acid, Fe@SiO@PNIPAM-co-MAA), which was characterized by transmission electron microscopy and X-ray diffraction techniques. The new nanomaterials integrated with the magnetism of nanoscale zero valent iron material and thermo-response of the copolymers, and were utilized to investigate the adsorption capacity for typical phenols such as bisphenol A, phenol and hydroquinone from water samples, and the results showed that the magnetic and thermo dual-responsive core-shell nanomaterial exhibited good adsorption ability to typical phenols. Based on these, a sensitive method was developed for the determination of bisphenol A, phenol and hydroquinone using as-prepared magnetic nanoparticles as the magnetic solid phase extraction sorbent prior to high performance liquid chromatography coupled with variable wavelength detection. Under the optimal conditions, linear linearity was obtained over the range of 0.1-500 μg L with the correlation coefficients (r) above 0.996. The detection limits of three analytes were in the range of 0.019-0.031 μg L, and the precisions were all less than 4.8% (n = 6). The developed method was evaluated with real water samples and excellent spiked recoveries in the range of 94.0-105.4% were achieved. These results indicated that the proposed method was a robust analytical tool and a useful alternative for routine analysis of such pollutants.
本研究制备了一种新型的磁热双响应核壳纳米材料（Fe@SiO@poly(N-异丙基丙烯酰胺-co-甲基丙烯酸，Fe@SiO@PNIPAM-co-MAA），通过透射电子显微镜和 X 射线衍射技术对其进行了表征。这种新型纳米材料结合了纳米零价铁材料的磁性和共聚物的温度响应性，用于研究从水样中吸附典型酚类物质（双酚 A、苯酚和对苯二酚）的能力，结果表明，磁热双响应核壳纳米材料对典型酚类物质具有良好的吸附能力。基于这些结果，开发了一种使用制备的磁性纳米粒子作为高效液相色谱-可变波长检测前的磁性固相萃取吸附剂，用于测定双酚 A、苯酚和对苯二酚的灵敏方法。在最佳条件下，三种分析物的线性范围为 0.1-500μg/L，相关系数（r）均大于 0.996。三种分析物的检测限在 0.019-0.031μg/L 范围内，精密度均小于 4.8%（n=6）。该方法用于实际水样的评估，得到了 94.0-105.4%的良好加标回收率。这些结果表明，该方法是一种强大的分析工具，是常规分析此类污染物的一种有用替代方法。
