A kind of zero-valent iron disulfide heterogeneous Fenton system and method thereof

Abstract

The invention discloses a zero-valent iron disulfide heterogeneous Fenton system, which includes physically mixed disulfide powder and zero-valent iron particles. The zero-valent iron disulfide heterogeneous Fenton system can be applied to To treat water containing heavy metal ions and organic pollutants, the zero-valent iron disulfide system in the present invention can maintain a high concentration of Fe in the system 2+ , so as to effectively slow down the deactivation rate of zero-valent iron, and regenerate the activity of zero-valent iron to a certain extent, so that the catalyst has better cycle stability and reuse rate in practical applications, which can effectively reduce the cost of use and improve economic benefits. Completely overcome the disadvantages of poor stability of the traditional zero-valent iron system in the process of oxidative degradation; greatly reduce the cost of wastewater treatment, overcome the problem of one-time use of zero-valent iron in the traditional step-by-step wastewater treatment method, high cost, and huge waste; save energy and time cost, which solves the problems that most traditional zero-valent iron systems require chemical compounding, high cost, and long time.

Description

technical field [0001] The present invention relates to the field of environmental protection sewage treatment, in particular to a zero-valent iron disulfide heterogeneous Fenton system and its construction method, the application of the system to step-by-step removal of heavy metal ions and organic pollutants in water, and a The experimental method of the system. Background technique [0002] With the development of industrialization, more and more attention has been paid to wastewater discharge. Wastewater often contains more than one main pollutant. Most wastewater, especially common acidic wastewater, not only contains toxic organic pollutants, but also contains a certain amount of heavy metals. ion. Regardless of organic pollutants, especially antibiotic pollutants, or heavy metal ion pollutants, direct discharge will cause extremely serious environmental pollution. Therefore, certain environmental protection measures will be taken for this kind of sewage. In the cas...

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Problems solved by technology

However, zero-valent iron is basically not used in the step-by-step treatment method, because zero-valent iron is easily oxidized, and a shell composed of iron oxides is formed on its surface during the treatment process, which prevents the internal elemental iron core from participating in the reaction, so it is quickly lost Catalytic activity

Therefore, zero-valent iron has certain theoretical advantages in wastewater treatment, but the current technology cannot take advantage of the advantages of zero-valent iron to make full use of it. Therefore, if zero-valent iron is used in sewage treatment, a large amount of zero-valent iron can only be used Valuable iron is used for one-time use, resulting in serious waste of resources, large energy consumption and secondary pollution.

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