SANGWen-jiao,ZHANGWen-bin,LUWei,et al.Effects of Polystyrene Microplastics on Flocs Formed in Coagulation Process of Waterworks[J].China Water & Wastewater,2022,38(11):32-37.
Effects of Polystyrene Microplastics on Flocs Formed in Coagulation Process of Waterworks
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第38卷
Number:
第11期
Page:
32-37
Column:
Date of publication:
2022-06-01
- Keywords:
- water treatment; microplastics; polystyrene; coagulation; turbidity; floc size; fractal dimension
- Abstract:
- Coagulation is a necessary process in water treatment, and microplastics exist in water resource objectively. In this study, taking polystyrene (PS) as an example, the effects of microplastics on turbidity removal, floc size and fractal dimension during coagulation were analyzed. The experimental results indicated that when the dosage of coagulant was 14 mg/L, the presence of microplastics reduced the turbidity removal rate by 7.1%, and the floc size and fractal dimension also decreased accordingly; When the dosage increased to 26 mg/L, the presence of microplastics increased the turbidity removal rate by 0.8% to 95.2%, the fractal dimension increased to 1.587, and the floc size did not change significantly. It showed that the presence of microplastics had a negative impact on the turbidity removal rate, floc size and fractal dimension when the dosage of coagulant was low. However, as the dosage of coagulant continued to increase, the negative effects were weakened, on the contrary, the presence of microplastics could promote turbidity removal and fractal dimension improvement with higher dosage of coagulant.
Last Update:
2022-06-01