Process Control and Investigation of Oxidation Kinetics of Postoxidative Effluents Using Gas Chromatography with Pulsed Flame Photometric Detection (GC-PFPD)

Abstract

This article presents the results of investigations on the use of headspace analysis and gas chromatography with pulsed flame photometric detection (HSA-GC-PFPD) to evaluate the effectiveness of oxidation of postoxidative effluents from the production of bitumens. Samples of effluents from the bitumen oxidation unit were used in the experiments. In addition, the kinetics of effluent oxidation was also investigated. The content of volatile sulfur compounds (VSCs) was determined using HSA-GC-PFPD. The results were correlated with chemical oxygen demand (COD). The changes in concentration of individual volatile sulfur compounds in the course of effluent oxidation were measured, which enabled the determination of the order of the oxidation reactions. The usefulness of the determination of VSCs in the headspace as a reliable technique for evaluating the reduction in emissions of volatile malodorous compounds was demonstrated. The developed method is also useful for process control of the oxidation of postoxidative effluents. The procedure ensures an objective evaluation of the effectiveness of the removal of volatile sulfur compounds from postoxidative effluents. The experimental results revealed that the effectiveness of the oxidation of organosulfur compounds was much higher than that of other classes of organic compounds. Furthermore, the order of oxidation reactions along with the rate constants of thiophenol, p-thiocresol, and hydrogen sulfide were determined. An advantage of the developed procedure is that it can be automated.

New procedure for the examination of the degradation of volatile organonitrogen compounds during the treatment of industrial effluents

“…Effluents from the production of bitumens are an example of strongly toxic effluents containing volatile organic compounds, including organosulfur, oxygenated, and organonitrogen compounds. Due to their specific properties, these effluents pose numerous problems during their treatment [12][13][14][15][16].…”

Investigation of volatile low molecular weight compounds formed during continuous reclaiming of ground tire rubber

“…In the case of presence of analytes at concentration level allowing direct determination by gas chromatography (GC), without the need of additional enrichment stage, a static headspace (SHS) is used as a rule [13,14]. The best performance for screening studies on the types spectrum of VOC analytes is achieved using a dynamic headspace (DHS e also called as Purge and Trap, P&T) and gas chromatography coupled with mass spectrometry (DHS-GC-MS).…”

Comparison of Ozonation and Evaporation as Treatment Methods of Recycled Water for Bioethanol Fermentation Process

“…The PO 4 3− was also measured by the method 8048 developed by HACH [26]. The ethanol concentration was analyzed by headspace capillary gas chromatography-mass spectrometry (HS-CGC-MS) [27][28][29]. The equipment used was a HP gas chromatograph, model 5890 series II and a HP single mass spectrometer quadrupole type, model 5972 A.…”