Article ? AI-assigned paper type based on the abstract. Classification may not be perfect — flag errors using the feedback button. Tier 2 ? Original research — experimental, observational, or case-control study. Direct primary evidence. Sign in to save

Surface characteristic and sinking behavior modifications of microplastics during potassium permanganate pre-oxidation

Journal of Hazardous Materials 2021 31 citations ? Citation count from OpenAlex, updated daily. May differ slightly from the publisher's own count. Score: 40 ? 0–100 AI score estimating relevance to the microplastics field. Papers below 30 are filtered from public browse.

Ruijuan Liu, Xinni Wu, Xinni Wu, Jianwei Fu, Xinni Wu, Xinni Wu, Ruijuan Liu, Yuan Liu Yuan Liu Ruijuan Liu, Ruijuan Liu, Yuan Liu Huase Ou, Yuheng Chen, Ruijuan Liu, Huase Ou, Yuan Liu Ruijuan Liu, Yuheng Chen, Yuheng Chen, Yuan Liu Ruijuan Liu, Xinni Wu, Xinni Wu, Xinni Wu, Xinni Wu, Xinni Wu, Xinni Wu, Xinni Wu, Xinni Wu, Xinni Wu, Xinni Wu, Xinni Wu, Xinni Wu, Xinni Wu, Yuan Liu Yuheng Chen, Huase Ou, Jianwei Fu, Xinni Wu, Xinni Wu, Ruijuan Liu, Xinni Wu, Xinni Wu, Xinni Wu, Ruijuan Liu, Xinni Wu, Xinni Wu, Yuan Liu Jianwei Fu, Jianwei Fu, Jianwei Fu, Yuan Liu Yuan Liu Yuan Liu Ruijuan Liu, Ruijuan Liu, Yuheng Chen, Yuheng Chen, Yuheng Chen, Yuheng Chen, Xinni Wu, Xinni Wu, Huase Ou, Jianwei Fu, Huase Ou, Huase Ou, Huase Ou, Xinni Wu, Ruijuan Liu, Yuheng Chen, Yuheng Chen, Jianwei Fu, Yuan Liu Jianwei Fu, Yuheng Chen, Jianwei Fu, Ruijuan Liu, Jianwei Fu, Ruijuan Liu, Xinni Wu, Huase Ou, Huase Ou, Huase Ou, Yuheng Chen, Huase Ou, Huase Ou, Huase Ou, Xinni Wu, Jianwei Fu, Xinni Wu, Ruijuan Liu, Huase Ou, Huase Ou, Ruijuan Liu, Ruijuan Liu, Huase Ou, Jianwei Fu, Ruijuan Liu, Ruijuan Liu, Ruijuan Liu, Huase Ou, Yuheng Chen, Huase Ou, Ruijuan Liu, Ruijuan Liu, Ruijuan Liu, Yuan Liu

Summary

Researchers found that potassium permanganate pre-oxidation treatment modifies the surface characteristics of microplastics in drinking water, altering their sinking behavior and affecting how they are processed during water treatment.

Polymers

PE PET PS PVC

Study Type Environmental

Microplastics (MPs) occur in the source water of worldwide drinking water treatment plants (DWTPs). Pre-oxidation treatments become the initial stage for MPs treatment in DWTPs. Investigating the modifications of MPs after pre-oxidations is important to understand their fate in DWTPs. In this study, potassium permanganate oxidation (PPO) was applied to treat four high abundant MPs in DWTPs, including polyethylene (PE), polyethylene terephthalate (PET), polyvinylchloride (PVC) and polystyrene (PS). Influences of polymer types, sizes and pH were considered. After 10 mg L PPO, only slight corrosions were observed on all MPs. Whereas, the appearances of O-Mn spectrum and the observation of nano-scale particles indicated the generation of nascent state Mn-oxides (MnO) on MPs surface. This adhesion of MnO contributed to increasing density and hydrophilicity. As a result, the sinking performance of MPs was enhanced, e.g. the sinking ratio of 6.5 µm MPs increased 30% (PET), 20% (PVC) and 30% (PS) compared with pristine ones upon pH 7 PPO. These results implied that the practical PPO can enhance the sinking behavior of MPs. Of note, PE seems to be persistent and requires special concern.

Read via DOI PubMed

Share this paper

Post Share Share Pin Email