Activation of peroxymonosulfate with brucite: a green catalyst for advanced oxidation processes

In the field of environmental pollution control, natural mineral fiber brucite (Magnesium hydroxide, Mg(OH)_2) has attracted much attention due to its environmentally friendly properties. Especially in advanced oxidation processes (AOPs), brucite, as a catalyst or auxiliary agent, activates peroxymonosulfate (PMS), showing unique advantages in degrading refractory organic pollutants.

Research background Methylene blue (MB), as a common dye, is widely present in wastewater from printing and dyeing industries, posing a serious threat to the water environment. Peroxymonosulfate, as a green oxidant, has the potential to decompose organic pollutants, but its reaction rate is slow and requires a catalyst to improve the activation efficiency.

Exploration of activation mechanism The activation mechanism of brucite mainly includes the following aspects:

Electron transfer: The hydroxyl groups on the surface of brucite may promote the generation of SO_5^- free radicals in PMS and enhance its oxidation ability.

Acid-base catalysis: The alkaline properties of brucite help to adjust the pH value of the reaction system and provide suitable conditions for the activation of PMS.

Active site adsorption: The surface of brucite may adsorb methylene blue molecules, making it closer to active oxygen species and accelerating its degradation.

In-depth experimental research The experimental study investigated the effects of different factors such as brucite dosage, PMS concentration, reaction time, solution pH and temperature on the degradation efficiency, and found that brucite can significantly improve the degradation rate and removal rate of PMS for methylene blue. The process has good environmental compatibility and low by-product generation.

Expansion of application prospects The method of using brucite to activate PMS to degrade methylene blue provides a new solution to dye pollution in water bodies. The natural source and environmental friendliness of brucite provide broad prospects for the application of this technology. Future research will further explore the modification methods of brucite, optimize the process conditions, and evaluate its application effect and economic feasibility in actual wastewater treatment.

As a natural mineral catalyst, brucite shows high efficiency and environmental friendliness in activating persulfate to degrade methylene blue. With the deepening of research, this method is expected to become a competitive green technology in the field of water treatment, contributing to environmental protection and sustainable development.