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A water treatment method that utilizes background pollutants to promote the formation of cu(iii) from trace copper ions

A technology of pollutants and copper ions, applied in the field of water pollution treatment, can solve the problems of increasing environmental risks and increasing treatment costs, and achieve the effects of convenient transportation and storage, reducing dosage, and promoting cyclic reactions

Active Publication Date: 2021-07-20
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Additional chemical addition not only increases the cost of treatment, but also may increase the potential environmental risk

Method used

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  • A water treatment method that utilizes background pollutants to promote the formation of cu(iii) from trace copper ions
  • A water treatment method that utilizes background pollutants to promote the formation of cu(iii) from trace copper ions
  • A water treatment method that utilizes background pollutants to promote the formation of cu(iii) from trace copper ions

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] 1. Take 6 parts of 200ml distilled water and prepare 2,4-dichlorophenol pollutant solution, 1,4-dioxane pollutant solution, benzothiazole pollutant solution, sulfa Methoxazole pollutant solution, atrazine pollutant solution, toluene pollutant solution, adjust the pH value of 6 parts of water samples to be treated to 8 with borate and sodium hydroxide;

[0039] 2. Add potassium monopersulfate and copper sulfate solutions sequentially to the 6 water samples to be treated, so that the concentration of potassium monopersulfate is 400 μmol / L, and the concentration of copper ions is 10 μmol / L. At the same time, each pollutant water sample Do the contrast samples of adding potassium monopersulfate separately and adding copper sulfate solution separately;

[0040]3. Fully stir the 6 parts of the water sample to be treated and the reference sample, without aeration during the reaction, take them out after 15 minutes of reaction, and measure the remaining 1,4-dioxane in the sampl...

Embodiment 2

[0043] 1. Take 100ml of distilled water and prepare a 2,4-dichlorophenol pollutant solution with a concentration of 20 μmol / L, and adjust the pH value of the water sample to be treated to 8 with borate and sodium hydroxide;

[0044] 2. Take 100ml of distilled water and prepare a 1H-benzotriazole pollutant solution with a concentration of 10μmol / L, and adjust the pH value of the water sample to be treated to 8 with borate and sodium hydroxide;

[0045] 3. Mix the above two water samples to be treated at a volume ratio of 1:1, so that the concentration of 2,4-dichlorophenol in the mixed water sample is 10 μmol / L, and the concentration of 1H-benzotriazole is 5 μmol / L;

[0046] 4. Add potassium monopersulfate and copper sulfate solution sequentially to the mixed water sample to be treated, so that the concentration of potassium monopersulfate is 400 μmol / L, and the concentration of copper ion is 10 μmol / L. Contaminant water samples (10μmol / L) were subjected to comparative degradat...

specific Embodiment 3

[0050] In specific embodiment 3, the pH value of the water sample to be treated in step 1 and step 2 is adjusted to 7, 9, 10, and other steps are the same as in embodiment 2. Under the conditions of pH 7, 9, and 10 in water, the presence of 1H-benzotriazole can promote the removal of 2,4-dichlorophenol to varying degrees, and 1H-benzotriazole has also been effectively When the removal rate of 2,4-dichlorophenol reaches 100%, the removal rate of 1H-benzotriazole can reach more than 90%. It can be seen that the water treatment decontamination method using benzotriazole pollutants in the background of water to promote trace copper ions to catalyze monopersulfate to form Cu(III) is applicable to a wide range of pH.

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Abstract

The invention relates to a water treatment method which uses background pollutants to promote the generation of Cu(III) by trace copper ions, and belongs to the technical field of water pollution treatment. The treatment method uses trace copper ions as a catalyst to treat organic pollutants, does not require complex catalyst preparation process and energy input, avoids problems of sludge production, catalyst deactivation and environmental risks, reduces the difficulty of subsequent treatment, and is safe and economical. Using the background benzotriazole pollutants in water and wastewater can further promote the cyclic reaction between copper ions, significantly reduce the dosage of Cu(II), and do not need to add additional reducing agents to change the reaction kinetics process, saving costs, and It will not cause secondary pollution. This method is suitable for a wide range of water pH, and can be carried out under oxygen-enriched and anoxic conditions. It is not easily affected by the background components of water quality, and is not easy to react with halides to produce toxic and harmful by-products, and finally realizes the harmlessness of organic pollutants. deal with.

Description

technical field [0001] The invention belongs to the technical field of water pollution treatment, and in particular relates to a water treatment method that utilizes background pollutants to promote the generation of Cu(III) by trace copper ions. Background technique [0002] With the rapid development of economy and society, a large number of new pollutants such as pesticides, pharmaceuticals, personal care products, endocrine disruptors, etc. have entered the water environment, leading to the deterioration of the ecological environment and posing a serious threat to human health and life safety. Benzotriazole pollutants (BTs), for example, are widely used as corrosion inhibitors in dishwasher detergents, coolants, aircraft deicing and antifreeze, metal processing, and chemical synthesis, in the U.S. alone The annual output can reach 9,000 tons, and it has been generally detected in various water bodies such as rivers, lakes, groundwater, municipal or industrial wastewater....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/72C02F101/38C02F101/30
CPCC02F1/72C02F1/725C02F2101/30C02F2101/34C02F2101/36C02F2101/38C02F2101/40C02F2209/06
Inventor 张涛王丽红
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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