Enhanced coagulation method for removing microplastics in water
US11661361B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 8, 2022 |
| Grant date | May 30, 2023 |
| Priority date | — |
| Expiry date | May 8, 2042 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F2101/36
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
An enhanced coagulation method for removing microplastics in water is provided. First, a certain amount of inorganic suspended particles are added to microplastic wastewater to increase the number of particles and thereby improve a collision probability among the particles; and then a natural polymer flocculant and a polysilicic acid are added. The polysilicic acid is used as coagulant aid, so that the three materials can comprehensively achieve the purpose of removing the microplastics in the wastewater. The enhanced coagulation method can combine respective characteristics and advantages of the three materials, so that the three materials can mutually complement each other and give full play to the role of charge neutralization and bridging and net capturing, strengthen the sedimentation performance and enhance the actual microplastic removal effect. Therefore, it is a green and environmentally-friendly enhanced coagulation technology.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.