Hydrotalcite magnetite composite water treatment material

A composite material and hydrotalcite technology, applied in the field of water treatment, can solve the problems of limiting the further application of homogeneous systems, low utilization rate of hydrogen peroxide, high treatment cost, etc., to achieve recycling and reuse, low price and fast reaction rate Effect

Inactive Publication Date: 2015-01-07
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The homogeneous Fenton reaction is the most typical advanced oxidation technology, and its essence is to use Fe 2+ and H 2 0 2 OH is catalyzed by a chain reaction between them, which has a strong oxidation ability, and its electron affinity reaches 569.3kJ. Selectively oxidize various pollutants. The homogeneous Fenton system produces a large amount of iron-containing sludge, so the treatment cost is high and causes secondary pollution. In addition, the utilization rate of hydrogen peroxide is low. These shortcomings limit the application of the homogeneous system. further application

Method used

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  • Hydrotalcite magnetite composite water treatment material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] According to Mg(N0 3 ) 2 , A1(N0 3 ) 3 The molar total ratio of 2 weighs 4.8g of NaOH, 12.7g of Na 2 C0 3 Dissolve in 150ml of distilled water to make a mixed alkali solution, weigh 15.4g of Mg(N0 3 ) 2 and 11.3g of A1 (N0 3 ) 3 Dissolve in 150ml of distilled water to form a mixed salt solution, mix and stir the mixed alkali solution and the mixed salt solution at a pH value of 10-11 to obtain a mixed solution; the mixing process is preferably dropwise. React the mixture at a constant temperature of 60-100°C for 3-5h, age, centrifuge, and wash to obtain a precipitate; add 2g of magnetite to the precipitate to mix, add 2ml of 95% ethanol to disperse, wash again, and dry at 60°C to obtain Hydrotalcite-magnetite composites.

[0035] The hydrotalcite-magnetite composite material obtained in this example degrades Microcystis aeruginosa. Weigh 0.125g of the hydrotalcite-magnetite composite material and add it to 250ml of Microcystis aeruginosa suspension with a mass c...

Embodiment 2

[0039] According to Mg(N0 3 ) 2 , A1(N0 3 ) 3 The molar total ratio of 2.5 weighs 4.8g of NaOH, 12.7g of Na 2 C0 3 Dissolve in 150ml of distilled water to make a mixed alkali solution, weigh 19.3g of Mg(N0 3 ) 2 and 11.3g of A1 (N0 3 ) 3 Dissolve in 150ml of distilled water to form a mixed salt solution, mix and stir the mixed alkali solution and the mixed salt solution at a pH value of 10-11 to obtain a mixed solution; the mixing process is preferably dropwise. React the mixture at a constant temperature of 60-100°C for 3-5h, age, centrifuge, and wash to obtain a precipitate; add 2g of magnetite to the precipitate to mix, add 2ml of 95% ethanol to disperse, wash again, and dry at 60°C to obtain Hydrotalcite-magnetite composites.

Embodiment 3

[0041] According to Mg(N0 3 ) 2 , A1(N0 3 ) 3 The molar total ratio of 3 weighs 4.8g of NaOH, 12.7g of Na 2 C0 3 Dissolve in 150ml of distilled water to make a mixed alkali solution, weigh 23.1g of Mg(N0 3 ) 2 and 11.3g of A1 (N0 3 ) 3 Dissolve in 150ml of distilled water to form a mixed salt solution, mix and stir the mixed alkali solution and the mixed salt solution at a pH value of 10-11 to obtain a mixed solution; the mixing process is preferably dropwise. React the mixture at a constant temperature of 60-100°C for 3-5h, age, centrifuge, and wash to obtain a precipitate; add 2g of magnetite to the precipitate to mix, add 2ml of 95% ethanol to disperse, wash again, and dry at 60°C to obtain Hydrotalcite Magnetite Composite No. 3.

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Abstract

The invention discloses a hydrotalcite magnetite composite water treatment material for catalyzing, degrading and treating wastewater. The hydrotalcite magnetite composite water treatment material is prepared by the following method which comprises the following steps: mixing a mixed alkali solution of NaOH and Na2CO3 and a mixed saline solution of Mg(NO3)2 and Al(NO3)3 under the condition that the pH value is 10-11 and stirring the two solutions to obtain a mixed liquid; carrying out thermostatic reaction on the mixed liquid for 3-5 hours at a temperature of 60-100 DEG C, aging, centrifuging and washing to obtain precipitates; adding the magnetite into precipitates, mixing, adding ethanol, dispersing, then washing and drying to obtain the hydrotalcite magnetite composite water treatment material. The hydrotalcite magnetite composite water treatment material has the benefits that the hydrotalcite magnetite composite water treatment material has strong oxidability and is free from selectivity, starting matters and intermediate products can be removed when organic matters are removed, and the effect of removing COD (Chemical Oxygen Demands), TOC (Total Organic Carbon), total nitrogen, total phosphorus, algal cells and the like is good; the magnetite in the composite material is very favorable for recycling the material; the effects of treating domestic sewage, factory wastewater and especially treating the water bloom phenomenon are excellent.

Description

technical field [0001] The invention belongs to the technical field of water treatment, in particular to a hydrotalcite-magnetite composite material used for catalytic degradation and treatment of waste water. Background technique [0002] The traditional sewage treatment adopts the biological method, which is a low-cost and high-efficiency treatment technology currently used. It is mainly used to treat bio-removable domestic sewage, but it is not suitable for removing a large number of difficult-to-remove organic pollutants. and biologically toxic pollutants. In recent years, the non-polluting and strong oxidizing advanced oxidation technology based on the use of OH has attracted widespread attention. [0003] The most notable feature of the advanced oxidation method is that OH is the main oxidant, which attacks organic matter to generate organic free radicals in the process of removing organic pollutants, which can continue to participate in the chain reaction of OH, or g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/72C02F1/52C02F1/30C02F1/42
CPCC02F1/30C02F1/42C02F1/5236C02F1/722C02F1/725C02F2001/422C02F2101/105C02F2101/163C02F2305/026C02F2305/10
Inventor 陈金毅喻杏元李晶王玉荣何欣王婷
Owner WUHAN INSTITUTE OF TECHNOLOGY
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