Flashcard library · Environmental Science · PaperFren
WWTPs cut plastic mass but leak nanoplastics
Two Chinese plants dropped MP/NP mass from 26.23 and 11.29 μg/L in influent to 1.75 and 0.71 μg/L in tertiary effluent, with nanoplastics removed least.
Keep what you just learned
Save these 10 cards to your NoteFren library. Your first review starts right away, and each card links back to the study it came from.
What size range of plastics was quantified?
MPs and NPs from 0.01 to 1000 μm, split into 50–1000, 1–50, and 0.01–1 μm.
Source: Assessing the Mass Concentration of Microplastics and Nanoplastics in Wastewater Treatment Plants by Pyrolysis Gas Chromatography-Mass Spectrometry · DOI · quote verified
What were plant A mass concentrations along the train?
26.23 μg/L influent → 9.50 primary → 7.62 secondary → 1.75 μg/L tertiary.
Source: Assessing the Mass Concentration of Microplastics and Nanoplastics in Wastewater Treatment Plants by Pyrolysis Gas Chromatography-Mass Spectrometry · DOI · quote verified
What were plant B end-of-pipe concentrations?
11.29 μg/L in and 0.71 μg/L tertiary effluent.
Source: Assessing the Mass Concentration of Microplastics and Nanoplastics in Wastewater Treatment Plants by Pyrolysis Gas Chromatography-Mass Spectrometry · DOI · quote verified
Which polymers dominated plant A influent?
PP 45.1%, PET 24.9%, PE 16.8% by mass.
Source: Assessing the Mass Concentration of Microplastics and Nanoplastics in Wastewater Treatment Plants by Pyrolysis Gas Chromatography-Mass Spectrometry · DOI · quote verified
Which size class was removed least in plant B?
0.01–1 μm nanoplastics at 78.09% removal.
Source: Assessing the Mass Concentration of Microplastics and Nanoplastics in Wastewater Treatment Plants by Pyrolysis Gas Chromatography-Mass Spectrometry · DOI · quote verified
How were plastics measured?
Single-shot pyrolysis GC/MS with external polymer calibrations.
Source: Assessing the Mass Concentration of Microplastics and Nanoplastics in Wastewater Treatment Plants by Pyrolysis Gas Chromatography-Mass Spectrometry · DOI · quote verified
What tertiary steps did plant A use?
Rapid sand filtration and UV disinfection.
Source: Assessing the Mass Concentration of Microplastics and Nanoplastics in Wastewater Treatment Plants by Pyrolysis Gas Chromatography-Mass Spectrometry · DOI · quote verified
Why are WWTPs important for environmental plastics?
They are major urban sources because some small particles pass treatment at high wastewater flux.
Source: Assessing the Mass Concentration of Microplastics and Nanoplastics in Wastewater Treatment Plants by Pyrolysis Gas Chromatography-Mass Spectrometry · DOI · quote verified
What literature removal benchmarks do the authors cite?
Generally >88% of MPs by secondary treatment and >97% by tertiary (count-based studies).
Source: Assessing the Mass Concentration of Microplastics and Nanoplastics in Wastewater Treatment Plants by Pyrolysis Gas Chromatography-Mass Spectrometry · DOI · quote verified
Were PP, PE, and PET also dominant in effluent?
Yes; they remained the main polymers in both plants’ effluents.
Source: Assessing the Mass Concentration of Microplastics and Nanoplastics in Wastewater Treatment Plants by Pyrolysis Gas Chromatography-Mass Spectrometry · DOI · quote verified