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Application of phosphate to promotion of green rust to activate molecular oxygen

A phosphate and patina technology, applied in chemical instruments and methods, special compound water treatment, oxidized water/sewage treatment, etc., to achieve cost-saving effects

Inactive Publication Date: 2021-02-09
GUANGDONG INST OF ECO ENVIRONMENT & SOIL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The inventor disclosed in the patent document CN111153492A that green rust has a good adsorption effect on phosphate, but the work on how phosphate can improve green rust to activate molecular oxygen to generate active oxygen species and then apply it to the degradation of pollutants has not been reported so far.

Method used

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  • Application of phosphate to promotion of green rust to activate molecular oxygen
  • Application of phosphate to promotion of green rust to activate molecular oxygen
  • Application of phosphate to promotion of green rust to activate molecular oxygen

Examples

Experimental program
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Effect test

Embodiment 1

[0064] The preparation of embodiment 1 green rust-phosphate complex

[0065] (1) Add 2g of ferrous sulfate heptahydrate directly into 10mL of NaOH solution (1mol / L), stir evenly with a glass rod and put into a 6cm magnetic rotor; then add 90mL of deionized water to obtain 100mL of Fe(OH) 2 Suspension, and carry out magnetic stirring, stirring speed is 400 rpm;

[0066] (2) Open and stir to make Fe(OH) 2 Partial oxidation, measure the molar ratio of ferrous iron to ferric iron in the suspension during stirring, when the molar ratio of ferrous iron to ferric iron in the suspension is 2.5:1, stop the reaction, and then in an oxygen-free environment Continue stirring to remove O from the suspension 2 , to obtain sulfate radical intercalation green embroidered, immediately transferred to a 250mL blue cap bottle, and then transferred to an anaerobic glove box to prevent the patina from continuing to oxidize, separated by filtration, dried and stored in anaerobic conditions;

[00...

Embodiment 2

[0068] The preparation of embodiment 2 green rust-phosphate complex

[0069] The preparation method of complex body in the present embodiment is consistent with embodiment 2, difference only lies in step (3), specifically as follows:

[0070] (3) get patina 50mg that step (2) obtains, add 0.5mmol / L sodium hydrogen phosphate aqueous solution 100mL, the final concentration of patina is 0.5g / L, the iron element in the patina and the phosphorus element in the sodium hydrogen phosphate The molar ratio of Fe / P was 8:1. After fully stirring, the pH was adjusted to 7.5 to obtain a patina-phosphate complex suspension with a Fe / P molar ratio of 8:1.

Embodiment 3

[0071] The preparation of embodiment 3 green rust-phosphate complex

[0072] The preparation method of complex body in the present embodiment is consistent with embodiment 2, difference only lies in step (3), specifically as follows:

[0073] (3) get the green rust 50mg that step (2) obtains, add 10mmol / L sodium hydrogen phosphate aqueous solution 100mL, the final concentration of green rust is 0.5g / L, the iron element in the green rust and the phosphorus element in the sodium hydrogen phosphate The molar ratio is 0.4:1. After fully stirring, a patina-phosphate complex suspension with a Fe / P molar ratio of 0.4:1 is obtained.

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Abstract

The invention relates to the technical field of environmental protection, and discloses application of a phosphate to promotion of green rust to activate molecular oxygen. The phosphate is a soluble phosphate; the green rust is at least one of chloride ion intercalation green rust, sulfate radical intercalation green rust and carbonate ion intercalation green rust; the molar ratio of the phosphorus element of the phosphate to the iron element of the green rust is (0.2-80):1; and the pH value of a mixture of the phosphate and the green rust is 6-8. Compared with single green rust, by adding thephosphate, green rust can be remarkably promoted to activate molecular oxygen, and the oxidative detoxification effect on various pollutants is achieved.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to the application of phosphate in promoting green rust to activate molecular oxygen. Background technique [0002] The use of iron-containing minerals to activate hydrogen peroxide and other substances is a classic Fenton-like reaction process, which can generate active oxygen species with strong oxidative properties (such as superoxide radicals, hydroxyl radicals, etc.), and is also an important treatment for water bodies and Advanced oxidation technology for detoxification of organic matter and heavy metals in soil and other media. [0003] In recent years, researchers have found that using ferrous clay minerals (such as reduced montmorillonite and nontronite), sediments can directly react with oxygen to generate hydroxyl radicals (OH), which can oxidize pollutants in the environment. reaction to achieve the purpose of oxidative detoxification. This...

Claims

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Application Information

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IPC IPC(8): C02F1/72C02F101/10C02F101/34C02F101/36
CPCC02F1/72C02F2305/023C02F2101/103C02F2101/345C02F2101/36
Inventor 方利平李芳柏刘凯
Owner GUANGDONG INST OF ECO ENVIRONMENT & SOIL SCI
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