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Pollution-free organic pollutant degradation reagent prepared from reduced metal and application method thereof

An organic pollutant and application method technology, applied in the field of organic pollutant degradation reagents, can solve the problems of weakened hydroxyl radical oxidation ability, time-consuming and laborious post-treatment, and reduced catalytic efficiency, so as to reduce the difficulty of subsequent treatment and reduce iron sludge. The effect of generation and dosage reduction of

Inactive Publication Date: 2018-09-04
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The Fenton reaction has advantages when applied to the oxidative degradation of organic pollutants, but there are also some disadvantages: 1) The Fenton reaction requires Fe 2+ In the presence of ions, iron sludge will be produced during the reaction process, resulting in reduced catalytic efficiency and time-consuming post-processing; 2) Fe in the Fenton reaction process 2+ ions will be oxidized to Fe 3+ ions, so that the oxidation ability of hydroxyl radicals generated by the decomposition of hydrogen peroxide is weakened, reducing the catalytic efficiency

Method used

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  • Pollution-free organic pollutant degradation reagent prepared from reduced metal and application method thereof
  • Pollution-free organic pollutant degradation reagent prepared from reduced metal and application method thereof
  • Pollution-free organic pollutant degradation reagent prepared from reduced metal and application method thereof

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Experimental program
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Effect test

Embodiment 1

[0047] According to the following four groups of conditions to do the control experiment,

[0048] (1) 10L of waste water to be treated, adjust the pH value to 0-7, FeSO 4 Concentration 0.02g / L, H 2 o 2 Concentration 0.3mmol / L;

[0049] (2) 10L of wastewater to be treated, adjust the pH value to 0-7, Mo concentration 0.05g / L, H 2 o 2 Concentration 0.3mmol / L;

[0050] (3) 10L of waste water to be treated, adjust the pH value to 0-7, FeSO 4 Concentration 0.02g / L, Mo concentration 0.05g / L;

[0051] (4) 10L of waste water to be treated, adjust the pH value to 0-7, FeSO 4 Concentration 0.02g / L, H 2 o 2 Concentration 0.3mmol / L, Mo concentration 0.05g / L;

[0052] Experimental results such as figure 1 , figure 2 , image 3 It can be seen from the experimental results that after adding cocatalyst Mo to the homogeneous Fenton system, the reaction rate of the system and the degradation efficiency of pollutants have been significantly improved.

Embodiment 2

[0054] (1) 10L of waste water to be treated, adjust the pH value to 0-7, FeSO 4 Concentration 0.02g / L, H 2 o 2 Concentration 0.3mmol / L, Mo concentration 0.05g / L;

[0055] (2) Mo powder recovery, washing to remove ionic impurities and dyes on the surface of Mo powder;

[0056] (3) 10L of waste water to be treated, adjust the pH value to 0-7, FeSO 4 Concentration 0.02g / L, H 2 o 2 Concentration 0.3mmol / L, add recovered Mo powder.

[0057] Cocatalyst Mo is recycled 5 times, and the experimental results are as follows Figure 4 As shown, within 10 minutes, the degradation rate of organic pollutants remained above 90%, and as the number of cycles increased, the effect of the cocatalyst Mo did not change significantly, so Mo has good stability as a cocatalyst and can be used in Simple recycling and recycling.

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Abstract

The invention relates to the technical field of chemistry, in particular to a pollution-free organic pollutant degradation reagent prepared from reduced metal. The organic pollutant degradation reagent comprises a Fenton reagent, wherein the Fenton reagent is prepared from an iron source and hydrogen peroxide; the organic pollutant degradation reagent also comprises reduced metal; the reduced metal is mixed in the Fenton reagent as a cocatalyst. The reduced metal is added into the Fenton reagent; in the wastewater treatment process, ferrous ions are oxidized into trivalent iron ions after hydrogen peroxide decomposition; hydroxyl radicals are generated; trivalent iron is fast reduced into ferrous ions at the surface of the reduced metal, so that the quantity of the ferrous ions is maintained; the process of decomposing hydrogen peroxide into the hydroxyl radicals is accelerated; the oxidation degradation rate of organic pollutants and the utilization rate of hydrogen peroxide are improved; the generation of iron sludge is reduced; the treatment cost is reduced.

Description

technical field [0001] The invention relates to the technical field of chemistry, in particular to a reagent for degrading organic pollutants. Background technique [0002] The Fenton reaction is an inorganic chemical reaction. The reagents are composed of ferrous salt and hydrogen peroxide. The Fenton process can oxidize organic compounds into inorganic states, so it has been widely used in the removal of organic polluted wastewater. Chemist Fenton HJ discovered in 1893 that the mixed solution of hydrogen peroxide and ferrous iron has strong oxidizing properties. After entering the 1970s, the Fenton reaction has been widely used in environmental chemistry. [0003] Afterwards, other scholars conducted a lot of research on the reaction mechanism of the Fenton reaction, and made a preliminary description of the reaction mechanism. 2+ +H 2 O → Fe 3+ +(OH) - +OH·, because of the existence of hydroxyl radicals, Fenton's reagent can have a very strong oxidizing property, and ...

Claims

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Application Information

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IPC IPC(8): C02F1/72C02F101/30
CPCC02F1/722C02F1/725C02F2101/30C02F2305/026
Inventor 张金龙邢明阳伊秋颖董陈成朱乔虹嵇家辉沈斌杜梦梦
Owner EAST CHINA UNIV OF SCI & TECH
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