Study on Separation and Extraction Method of Microplastics in Sewage Treatment Plant
Plastic particles or fibers with a particle size smaller than 5 mm are called microplastic Microplastics(MPs).As the"source"and"sink"of MPs,sewage treatment plant is determined to be the key link before land-based MPs enters the Natural water environment.The separation and extraction of microplastic samples from sewage treatment plant is a key step in the follow-up study of microplastic occurrence and removal.In this study,three kinds of digestion agents(30%H2O2,Fenton reagent and NaOH)combined with ZnCl2 flotation agent were used to separate and extract 4 types and 4 kinds of microplastics in sewage and sludge.The results show that 30%H2O2 digestion combined with ZnCl2 flotation is suitable for wastewater treatment plant water samples,post-digestion method is suitable for dewatered sludge samples,and 30%H2O2 digestion is carried out after ZnCl2 flotation.Raman spectra showed that the characteristic peaks of PET changed most significantly,but it did not affect the identification of its types.
sewage treatment plantmicroplasticsrecoveryseparation and extractionmicro-raman spectroscopy
万方数据
维普
