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eISSN: 2083-5906
ISSN: 1230-1485
ISSN: 1230-1485
ORIGINAL RESEARCH
Efficient Removal of Polyethylene Using
Magnesium Hydroxide and Anionic
Polyacrylamide as Dual-Coagulant by
Coagulation-Flocculation Processes
1
Tianjin Key Laboratory of Aquatic Science and Technology, School of Environmental and Municipal Engineering,
Tianjin Chengjian University, 26 Jinjing Road, Xiqing District, Tianjin, 300384, China
Submission date: 2025-01-17
Final revision date: 2025-05-14
Acceptance date: 2025-06-24
Online publication date: 2025-09-15
Corresponding author
Jianhai Zhao
Tianjin Key Laboratory of Aquatic Science and Technology, School of Environmental and Municipal Engineering, Tianjin Chengjian University, 26 Jinjing Road, Xiqing District, Tianjin, 300384, China
Tianjin Key Laboratory of Aquatic Science and Technology, School of Environmental and Municipal Engineering, Tianjin Chengjian University, 26 Jinjing Road, Xiqing District, Tianjin, 300384, China
KEYWORDS
TOPICS
ABSTRACT
Microplastics, a new type of contamination, were extensively distributed in water areas with
increasing plastic production and poor management of plastic waste. Simultaneously, removing
pollutants from water was a popular research topic in the field of water treatment. In this investigation
of water treatment, simulated natural water containing polyethylene was treated using magnesium
hydroxide and anionic polyacrylamide as dual coagulants. Based on a series of experiments, the optimum
reactor conditions were an Mg2+ concentration of 40 mg/L, a pH of 12, and a temperature of 20℃. The
maximum removal efficiency of polyethylene could reach 84.9% ± 3% under the optimal experimental
conditions with the average size of flocs 57.19 μm. Using an intelligent Photometric Dispersion
Analyzer, the full processes of coagulation-flocculation were recorded. Evaluating coagulationflocculation
performance using flocs’ flocculation index and polyethylene removal efficiency as metrics.
Scanning electron microscopy, Fourier transform infrared spectroscopy, and zeta potential were used
to study the performance and coagulation characteristics. The results of this work confirm that the
removal of microplastics relied on adsorption bridge and sweep flocculation mechanisms. This study
provides a valuable theoretical basis for an in-depth comprehension of the performance and coagulation
characteristics of removing polyethylene from wastewater.
CONFLICT OF INTEREST
The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
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CITATIONS (1):
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| eISSN: | 2083-5906 |
| ISSN: | 1230-1485 |
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