Synthesis and Characterization of b-CyclodextrinNanosponge and Its Application for the Removal of p-Nitrophenol from Water b-Cyclodextrin (b-CD)-based nanosponges (NSs) were synthesized by reacting b-CD with hexamethylenediisocyanate (HMDI) as the cross-linking agent. The effects of the reaction parameters, such as the b-CD/HMDI molar ratio, reaction temperature, and type of cross-linker, on the NS synthesis were systematically examined. The removal of p-nitrophenol (p-NP) from water by NSs was determined through adsorption experiments. The adsorption efficiency of the NSs synthesized at different temperatures did not change significantly, but the adsorption efficiency of the NSs was influenced by the HDMI concentration and cross-linker type. The characteristic Fourier transform infrared (FTIR) bands showed that p-NP was adsorbed parallel to the surface of the NSs. The Langmuir model had the highest correlation coefficient for the adsorption of p-NP onto the NSs. The maximum adsorption capacity (Q°) and adsorption energy (b) for p-NP were estimated to be 1.0 mg g À1 and 1.837 L mg À1 , respectively. The NSs synthesized under the optimum conditions were characterized by transmission electron microscopy (TEM), scanning electron microscopy (SEM), X-ray diffraction (XRD), thermogravimetric analysis (TGA), and laser diffraction particle size (LDPS) analysis. The combination of the results from SEM, TEM, and LDPS analysis indicated that the synthesized NSs had a porous, sponge-like, and rigid structure. The results of XRD and TGA also revealed the formation of b-CD-NSs.
BLEVE; aşırı ısıtılmış bir sıvının atmosferinde basınç altında ani salınım olarak bilinir. Bu ani salınımların nedeni, tankın etrafındaki yangınlar, korozyon, tankın içinde aşırı ısınma nedeniyle oluşmaktadır. Yangın vs. olay bir kabı veya tankı etkiliyorsa, kabın sıvılaştırılmış gazında yüksek basınç olan bazı değişiklikler gözlenir. Bu araştırmada BLEVE olaylarına odaklanılmıştır. Bu tür olayların insanlar ve çevre üzerinde belirli bir olumsuz etkisi vardır. Bu sonuçlar, damarların parçalanması, alev oluşumu, aşırı basınç ve termal radyasyon etkileridir. Bu çalışmada, aşırı basınç, ateş topu gibi BLEVE sonucunda ortaya çıkabilecek etkileri analiz edilmiş ve insanlar ile çevre üzerindeki etkisi değerlendirilmiştir. Patlama / yangın kaynağından uzaklaştıkça yanıkların yoğunluğunun azaldığı tahmin edilmektedir.
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