Various methods of sodium persulfate activation?

Sodium persulfate is an important raw material developed in recent years to control environmental pollution. In particular, activated sodium persulfate has gradually become one of the mainstream technologies for remediation of medium and low concentration organic contaminated sites from the traditional treatment of refractory organic wastewater, and its application range is also relatively wide. Today, I mainly talk to you about several methods of sodium sulfate activation!

1. thermal activation: thermal activation breaks the molecular oxygen bond in sodium persulfate to produce SO4-. The quantum yield of SO4- is 2, and the required thermal activation energy is about 140.2KJ/mol.

2. Overactivation of metal ions: transition metal ions can react with persulfate to generate SO4-, which is more oxidizing than persulfate, thus enhancing the oxidation ability of pollutants.

3. Photoradiation activation: In the presence of light, persulfate can produce SO4- at room temperature, and the quantum yield of SO4- is 2. At the same time, it is found that sunlight contains 5% ultraviolet rays, so it has the ability to activate persulfate.

4. Activation of zero-valent iron: When Fe is activated, sodium persulfate is directly transferred from Fe2+ bound to Fe or iron surface to persulfate through electrons.

Activation of activated carbon: Activated carbon is a good adsorbent and catalyst or catalyst carrier, so it can be used to activate sodium persulfate. In addition, activated carbon itself contains a certain amount of metal ash, so there may be an activation process of metal or metal ions in the process of catalyzing persulfate.