چکیده مقاله
We have developed an efficacious methodology for degradation of volatile organic compounds VOCs from the matrix of bitumen under visible light conditions which time dependent density functional theory TD DFT analysis supports the degradation of VOCs by sulfur doped phenol rich bio oil S_4 ∙ WPn n = 1–3 prepared by C−S coupling reaction This method involves two sequential reactions where the degradation of the VOCs is followed by sulfur doped phenol rich bio oil S_4 ∙ WPn n = 1–3 with C−S coupling reaction This study examines how sulfur doped phenol rich bio oil S_4 ∙ WPn n = 1–3 reduces the emission of the VOCs from the bitumen matrix To do so, we have evaluated the degradation pathway of two bitumen VOCs Benzoic acid and Benzofuran by S_4 ∙ WPn TD–DFT results indicate that the S_4 ∙ WPn have the potential to retain these VOCs in the bitumen matrix Our calculations also predict that the reaction of tetrameric radical sulfur S_4 ∙ with bio oil WPn and subsequent VOCs could accelerate the degradation of VOCs while diminishing bitumen aging To gain insight into the C–S cross coupling mechanism, we have performed UV–Vis spectroscopic measurements for VOCs and VOCs S_4 WPn compounds TD–DFT calculations also predicted a significant red shift in UV Vis spectroscopic absorption spectrum at 400 nm albeit with a weaker absorption when S_4 ∙ WPn and VOCs reacted and these peaks resulted from the degradation of VOCs The study outcomes show the efficacy of sulfur doped phenol rich bio oils in the degradation of selected VOCs An interesting phenomenon was found that UV Vis spectroscopic absorption red shift ~200 nm occurs after the C−S coupling reaction between S_4 ∙ WPn and VOCs The absorption spectral of VOCs S_4 WPn has been red shifted to nearly 400 nm The red shift enhanced the ability of these VOCs compounds to absorb light at a wavelength higher than 200 nm, thereby favoring the direct photodegradation of VOCs compounds
کلیدواژهها
نویسندگان
Razieh Neyband
Department of Chemistry, Faculty of Science, Lorestan University, Khoramabad, Iran
شیوه ارجاع
Neyband, Razieh,1403,Degradation Pathway Of Volatile Organic Compounds Of Bitumen In The Presence Of Sulfur-Doped Phenol-Rich Bio-Oils,7th International Conference on Civil Engineering Architecture and Urban planning with an approach to urban infrastructure Development
ارائهشده در
مجموعه مقالات هفتمین کنفرانس بین المللی عمران، معماری، شهرسازی با رویکرد توسعه زیرساخت های شهری30 مهر 1403