Microplastic removal efficiency and challenges of magnetic magnesium hydroxide in water treatment
Characteristics and application advantages of magnetic magnesium hydroxide
By introducing magnetic particles into magnesium hydroxide, it is magnetically modified, which facilitates recycling and reuse through an external magnetic field and reduces secondary pollution during the treatment process. The coagulation effect of magnetic magnesium hydroxide helps remove suspended solids in water, including microplastics, and its pH adjustment ability also helps create an environment that is not conducive to the stability of microplastics. Challenges under complex water quality conditions
Substances in natural water bodies such as kaolin and humic acid may compete with microplastics for the adsorption sites of magnetic magnesium hydroxide, affecting its removal efficiency. The colloidal properties and complexing ability of these substances may interfere with the coagulation process and affect the flocculation and precipitation effects of magnetic magnesium hydroxide. Humic acid may increase the color of the water and reduce its transparency, making it difficult to monitor the removal effect of microplastics. Future research directions
The study determined the optimal conditions for the use of magnetic magnesium hydroxide, including dosage, reaction time, and the application of an external magnetic field, to improve the removal efficiency of microplastics. The synergistic effect of magnetic magnesium hydroxide and other coagulants was explored to overcome the interference of kaolin and humic acid and optimize the water treatment process. The removal efficiency and environmental impact of magnetic magnesium hydroxide under different microplastic types and actual water conditions were studied in depth. As a potential water treatment material, magnetic magnesium hydroxide shows unique advantages in the removal of microplastics. However, its practical application in natural water bodies needs to consider the impact of coexisting substances and the corresponding technical challenges. Through in-depth research and process optimization, magnetic magnesium hydroxide is expected to become an effective means to improve the removal efficiency of microplastics in water bodies.