Utilizing 3D DOSY NMR in the Characterization of Organic Compounds in Coal Chemical Wastewater

Coal chemical wastewater(CCW)with the features of high toxicity and poor biodegrad-ability is a big issue in environmental remediation,posing a great threat to aquatic eco-systems and to human beings.Such complex molecular mixtures are notoriously difficult to characterize without initial physical separation.Herein,we present the 3D diffusion ordered spectroscopy(DOSY)analysis for CCW using DOSY-COSY and DOSY-HSQC methods,the advantages of this strategy have been demonstrated in the analysis of mixtures of aliphatic oxygenates and aromatic compounds,before being implemented on a genuine CCW sample in this study.The results showed that 3D DOSY is a robust and reliable tool for providing superior resolution and virtual separation of complex pollutants,and can be used as a general approach for structural elucidation.