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

Abstract

We present a new procedure for the determination of 32 volatile organonitrogen compounds in samples of industrial effluents with a complex matrix. The procedure, based on dispersive liquid-liquid microextraction followed by gas chromatography with nitrogen-phosphorus and mass spectrometric detection, was optimized and validated. Optimization of the extraction included the type of extraction and disperser solvent, disperser solvent volume, pH, salting out effect, extraction, and centrifugation time. The procedure based on nitrogen-phosphorus detection was found to be superior, having lower limits of detection (0.0067-2.29 μg/mL) and quantitation as well as a wider linear range. The developed procedure was applied to the determination of content of volatile organonitrogen compounds in samples of raw effluents from the production of bitumens in which 13 compounds were identified at concentrations ranging from 0.15 to 10.86 μg/mL and in samples of effluents treated by various chemical methods.

Method for the simultaneous determination of monoaromatic and polycyclic aromatic hydrocarbons in industrial effluents using dispersive liquid–liquid microextraction with gas chromatography–mass spectrometry

“…The remaining parameters, that is the volume of IPA, extraction time, and centrifugation time, were not significant factors in the studied range. The same effect was observed in previous studies . Therefore, 700 μL of IPA, 20 s extraction time, and 5 min centrifugation were used in further experiments.…”

“…In turn, the increase in solubility reduces the amount of recovered extraction solvent after extraction processes and contributes to the increase in the concentration of analytes in DCM. The same kind of extraction solvent was selected in previous works for extraction of other groups of VOCs compounds .…”

Study of Different Advanced Oxidation Processes for Wastewater Treatment from Petroleum Bitumen Production at Basic pH

“…Two unidentified peaks, N-X1 and N-X2, were quantified using the same approach described in our previous work. 35 2-Ethyl-1-hexylamine revealed to be a byproduct of oxidation of other compounds in H 2 O 2 processes with a significant increase of concentration. In addition, it revealed to be persistent to degradation at 25 °C in O 3 and O 3 /H 2 O 2 processes.…”

Application of cyanated asphaltenes in gas-phase adsorption processes for removal of volatile organic compounds

“…Above-mentioned results and former literature reports on utilization of asphaltenes for waste gas purification indicate that the presented application can be used in petrochemical industry for adsorption of volatile compounds containing sulfur, nitrogen, oxygen, as well as aromatic hydrocarbons. These compounds are typically present in waste gases emitted from process streams (Boczkaj et al 2016a;Boczkaj et al 2017;Makos et al 2018a, b).…”