Organic pollution poses a serious threat to the ecological environment and human health. From polycyclic aromatic hydrocarbons discharged by factories to pesticide residues in farmland, these persistent pollutants act like “ecological tumours”. Traditional treatment methods often suffer from drawbacks such as low efficiency, high cost, risk of secondary pollution, and limited degradation capability for complex organics. Sodium persulfate, as an efficient environmental remediation material, demonstrates notable advantages in organic pollution treatment.
I. The “Chemical Blade” for Remediation: Activation Principle of Sodium Persulfate
Sodium persulfate (Na₂S₂O₈) is a stable white crystalline compound. In its unactivated state, its oxidising power is relatively mild. In remediation processes, the core mechanism lies in generating strongly oxidising sulfate radicals (SO₄⁻・) through activation. These radicals effectively cleave chemical bonds such as C–C and C–H in organic molecules. Under their action, various organic pollutants including benzene series, petroleum hydrocarbons, and chlorinated hydrocarbons are gradually mineralised into carbon dioxide, water, and corresponding inorganic ions, achieving effective removal and degradation. Sodium persulfate products manufactured by Fujian Zhanhua Chemical, with their stable quality and high purity, provide an excellent raw material basis for efficient generation of sulfate radicals in subsequent remediation applications.
II. Multiple Activation Pathways: Adapting to Complex Contaminated Environments
The high efficiency of sodium persulfate largely stems from its flexible activation methods, which can suit different contamination scenarios:
Thermal activation is one of the most commonly used approaches. When the ambient temperature rises, persulfate molecules absorb energy and spontaneously decompose to produce sulfate radicals. This method is particularly suitable for treating high‑concentration contaminated sites, as heating accelerates reaction rates and significantly reduces pollutant levels in a short time.
Chemical activation demonstrates stronger adaptability. Ferrous ions (Fe²⁺) are common activators; they catalyse persulfate decomposition to continuously generate sulfate radicals. This method does not require high temperatures and works at ambient conditions, making it especially suitable for in‑situ soil remediation.
Photo‑activation offers a new route for surface pollution treatment. Under ultraviolet or visible light irradiation, persulfate can be directly photolysed or activated through photosensitisation to produce sulfate radicals. This approach is not only environmentally friendly with no secondary pollution, but can also utilise solar energy to reduce remediation costs, holding broad prospects for shallow soil and surface water treatment.
III. Synergistic Remediation Mechanisms: Enhancing Pollution Control Efficiency
In remediation processes, sodium persulfate can synergise with environmental media and other remediation technologies to further improve efficiency:
In soil remediation, hydroxyl groups on soil mineral surfaces can enrich persulfate molecules through adsorption, increasing local reagent concentration and enhancing contact probability with pollutants. More importantly, chemical oxidation converts large refractory organic molecules into smaller, biodegradable intermediates. After persulfate is depleted and environmental conditions recover, these intermediates can be further degraded and mineralised by indigenous soil microorganisms, achieving a sequential synergy of chemical oxidation and biodegradation, thus more effectively removing pollutants.
For groundwater contamination, persulfate can be combined with viscosity modifiers or sustained‑release materials. By controlling the migration and diffusion rate of the reagent in groundwater, the contact time with pollutants is prolonged, improving reagent utilisation efficiency. This synergistic regulation strategy effectively reduces remediation costs and enhances the stability of treatment outcomes.
Post time: Jul-27-2026
