Abstract
Mononitrotoluene (MNT) wastewater is a kind of explosive wastewater generated from MNT production, which is toxic and poorly degradable. The reduced pressure distillation was introduced to remove the organic pollutants from this wastewater. The effect of distillation temperature on chemical oxygen demand (COD) removal was studied. The chemical changes of MNT wastewater before and after distillation were evaluated by using UV–Vis spectroscopy, Gas Chromatography/Mass Spectroscopy (GC/MS) and Fourier Transform Infrared Spectroscopy (FTIR). The acute toxicity of MNT wastewater and its distillate was evaluated by bacterium bioluminescence assay using a freshwater bacterium Vibrio-qinghaiensis sp. Nov. The results indicated that the main organic components in MNT wastewater were three mononitrotoluene isomers (2-nitrotoluene, 3-nitrotoluene, 4-nitrotoluene) and benzoic acid, 2-methyl-3,5-dinitrophenol, 4-methyl-2,6-dinitrophenol and 1,3-benzenediol. The majority of the organic pollutants were separated from MNT wastewater after distillation. The removal efficiency of COD increased with decreasing temperature, when the temperature was 60°C, 98.9% of COD was removed and 99.5% of acute toxicity was reduced.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
