ZHAOZhi-jian,FANGHao,LIUQian-long,et al.Characteristics of Microplastics Removal and Synergistic Water Purification Effect in Coagulation Sedimentation-Ultrafiltration Process[J].China Water & Wastewater,2024,40(17):36-41.
Characteristics of Microplastics Removal and Synergistic Water Purification Effect in Coagulation Sedimentation-Ultrafiltration Process
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第40卷
Number:
第17期
Page:
36-41
Column:
Date of publication:
2024-09-01
- Keywords:
- microplastics; coagulation sedimentation; ultrafiltration; co-existing pollutants; correlation analysis
- Abstract:
- Microplastics, as a type of emerging pollutants, are widely distributed in the aquatic environment and have biological toxicity. The removal efficiency of microplastics by drinking water treatment processes affects the safety of drinking water for residents, which is particularly important. This study took microplastics in actual water as the research object and investigated the removal efficiency of coagulation sedimentation-ultrafiltration processes on microplastics. When the coagulant dosage was 60 mg/L, the removal rate of microplastics reached 59.5%. Microplastics of different sizes and shapes showed different removal efficiencies. No microplastics was detected in the ultrafiltration effluent. Micro-Fourier transformation infrared spectroscopy showed that there were four types of microplastics in the raw water,namely polypropylene (PP), polyethylene terephthalate (PET), polyester fiber (PES), and polyethylene (PE), among which coagulation sedimentation had the best removal efficiency on PES microplastics. There was a significant correlation between the abundance of microplastics and the metal ions concentrations of chromium, iron, manganese and calcium in the whole treatment process, with the highest correlation coefficient of 0.91.
Last Update:
2024-09-01