Sulfide-containing industrial wastewater treatment reagent and reaction method thereof

Abstract

The invention relates to the field of chemistry, in particular to the treatment of contaminants. A sulfide-containing industrial wastewater treatment reagent comprises a Fenton reagent containing an iron source and hydrogen peroxide, and also comprises sulfide, wherein the sulfide is mixed in the Fenton reagent to be used as a cocatalyst of the Fenton reagent. Compared with the traditional homogeneous Fenton reaction system, the cheap and readily available sulfide is used as the cocatalyst, so that the catalytic reaction is firstly carried out on the surface of the sulfide to improve the efficiency of decomposition of hydrogen peroxide to generate hydroxyl radicals during the Fenton reaction process and improve the degradation efficiency and the utilization efficiency of the hydrogen peroxide, and the sulfide per se can be recycled, and the problem of producing a large amount of iron sludge by homogeneous Fenton can be avoided, thereby reducing the treatment cost.

Description

technical field [0001] The invention relates to the field of chemistry, in particular to wastewater treatment. Background technique [0002] The combination of ferrous salt and hydrogen peroxide is called Fenton's reagent. British scientist H.J.H.Fenton first discovered in 1894 that various organic substances can be effectively degraded in this combination system, which has obvious advantages over other water treatment technologies. In 1964, Eisenhouser first used Fenton's reagent to oxidize wastewater containing phenol and alkylbenzene. In 1968, Bishop had a preliminary discussion on the treatment of organically polluted wastewater by Fenton oxidation. Since then, Fenton's reagent has been widely used in the treatment of industrial organic wastewater, such as phenols, printing and dyeing wastewater, and p-aminobenzenesulfonic acid. However, the traditional Fenton reaction has the following disadvantages: 1) the utilization rate of hydrogen peroxide is low, and the convers...

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Problems solved by technology

However, the traditional Fenton reaction has the following disadvantages: 1) the utilization rate of hydrogen peroxide is low, and the conversion rate of ferric ions to ferrous ions is low, resulting in incomplete degradation of organic pollutants; 2) the traditional homogeneous Fenton reaction is generally It is required to be carried out under the environment of pH=3, and the actual wastewater generally cannot reach this pH value, and adjusting the acidity will increase the cost of water treatment; 3) The Fenton reaction system is to add iron salt to the system as a catalyst, and excessive iron ions Will exist in aqueous solution or mud, making subsequent processing time-consuming and labor-intensive

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