Persulfate activating method

Abstract

The invention provides a persulfate activating method. A homogeneous system is generally adopted for common transition metal activation, secondary pollution is prone to being caused due to the fact that metal ions are dissolved in water, meanwhile, the catalysis activity of the homogenous system is largely affected by pH values, and the homogenous system cannot be recycled and has potential toxicity. Fe3O4 which is a non-homogenous Fenton reaction catalyst excellent in performance is adopted, activation of persulfate and degradation of pollutants occur on the surface of the Fe3O4, contact between generated SO4<->. and Fe<2+> in the Fe3O4 can be effectively reduced, the probability of side reaction is lowered, and it is ensured that the utilization rate of persulfate is high; and secondarypollution caused by a large amount of iron ions dissolved in water is avoided.

Description

technical field

[0001] The invention belongs to the field of ecological environment protection, and in particular relates to a method for activating persulfate. Background technique

[0002] Based on the sulfate radical (SO 4 - )’s advanced oxidation technology is a research hotspot in the field of environmental governance in recent years. Persulfate can be activated by ultraviolet light, heat, transition metals, etc. to produce SO 4 - · Among these activation methods, transition metal ion activation has higher practical application value compared with other activation methods due to its low energy consumption and low cost; however, transition metal activation is generally a homogeneous system, which easily causes metal ion dissolution. At the same time, the catalytic activity of the homogeneous system is greatly affected by the pH value, which cannot be recycled and has potential toxicity. In recent years, the activation methods of transition metal oxides have gradually ...

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