Laminated composite metal hydroxide for removing pollutants from water, preparation method and application thereof

A layered composite and hydroxide technology, applied in the field containing copper, iron, zinc, to achieve the effect of high utilization efficiency and convenient preparation

Active Publication Date: 2016-12-07
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional LDHs are composed of divalent magnesium ions and trivalent aluminum ions. So far, there are no related research reports on LDHs materials containing copper, zinc, and iron ions for the simultaneous removal of various organic / inorganic micro-pollutants in water bodies.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] A layered composite metal hydroxide for removing pollutants in water, the preparation method of which comprises the following steps:

[0045] (1) Configure 100ml of the first solution containing 50mmol / L of Cu 2+ , Zn of 100mmol / L 2+ and 300mmol / L Fe 2+ , Another 100ml second solution was configured, containing 900mmol / L NaOH.

[0046] (2) The first solution and the second solution prepared above are added dropwise to a beaker containing 100ml of deionized water at the same time, vigorously stirred during the dropwise addition, and the pH value of the reaction process is controlled at about 7.

[0047] (3) After the reaction, age at 20° C. for 7 days, centrifuge, and repeatedly wash the precipitate with deionized water until the pH value of the supernatant reaches neutral. Dry it at 60°C and grind it into powder with a mortar to get layered composite metal hydroxide.

[0048] The prepared layered composite metal hydroxide is used to remove arsenic in water containin...

Embodiment 2

[0051] A layered composite metal hydroxide for removing pollutants in water, the preparation method of which comprises the following steps:

[0052] (1) Configure 100ml of the first solution containing 30mmol / L of Cu 2+ , 50mmol / L of Zn 2+ and 20mmol / L of Fe 2 + , Another 100ml second solution was configured, containing 500mmol / L NaOH.

[0053] (2) The first solution and the second solution prepared above are added dropwise to a beaker containing 100ml of deionized water at the same time, vigorously stirred during the dropwise addition, and the pH value of the reaction process is controlled at about 7.

[0054] (3) After the reaction, age at 20° C. for 7 days, centrifuge, and repeatedly wash the precipitate with deionized water until the pH value of the supernatant reaches neutral. Dry it at 60°C and grind it into powder with a mortar to get layered composite metal hydroxide.

[0055] The prepared layered composite metal hydroxide is used to remove fluorine in water conta...

Embodiment 3

[0058] (1) Three kinds of salts of cupric chloride, zinc nitrate and ferrous sulfate are configured into the first solution of 40ml, containing the Cu of 500mmol / L 2+ , 500mmol / L of Zn 2+ and 500mmol / L of Fe 2+ , the anions are nitrate ions, chloride ions and sulfate ions, and another 150ml second solution is prepared, containing 400mmol / L NaOH.

[0059] (2) The first solution and the second solution prepared above are added dropwise to a beaker containing 200ml of deionized water at the same time, and the beaker is vigorously stirred during the dropwise addition process, while controlling the pH value of the reaction process to remain at about 8.

[0060] (3) After the reaction, age at 25° C. for 10 days, centrifuge, and wash repeatedly with deionized water until the pH of the supernatant reaches neutral. Dry it at 40°C and grind it into powder with a mortar to obtain a layered composite metal hydroxide.

[0061] The prepared layered composite metal hydroxide is used to re...

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Abstract

The invention relates to a laminated composite metal hydroxide for removing pollutants from water, a preparation method and an application thereof. The laminated composite metal hydroxide is prepared according to the following steps: mixing a solution containing Cu2<+>, Zn<2+> and Fe<2+> with NaOH solution in deionized water; stirring and reacting; ageing for a period of time and then separating solid from liquid, thereby acquiring a precipitate, namely, the objective product. The laminated composite metal hydroxide can be used for absorbing and removing the inorganic pollutants from water and / or catalyzing oxidation degradation of the organic pollutants. Compared with the prior art, the laminated composite metal hydroxide can effectively catalyze oxidation degradation of the organic pollutants in water; the laminated composite metal hydroxide is combined with an absorption technique for absorbing and separating the inorganic pollutants in water, so that the inorganic pollutants including arsenic, fluorine, and the like and the persistent organic pollutants in water are effectively removed and water is purified; the laminated composite metal hydroxide has the advantages of convenience in preparation, high utilization efficiency, and the like.

Description

technical field [0001] The invention belongs to the technical field of synchronous removal and treatment of various pollutants in water, and relates to the synthesis of layered composite metal hydroxides containing copper, zinc and iron that can be used to catalyze, oxidize, and degrade organic matter in water by using chemical reagents. Hydroxide can effectively adsorb inorganic pollutants such as arsenic and fluorine in water, and apply it to simultaneously remove various pollutants in water to realize the purification of polluted water. Background technique [0002] The harm of arsenic and fluorine pollution to human health is a worldwide problem. At present, arsenic pollution incidents in large areas have occurred in more than a dozen countries in the world. my country is one of the countries with serious pollution in this area. Arsenic and fluorine pollution have been affecting the safety of drinking water for rural residents in Northwest China and other places. At pre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/06C02F1/00C02F1/28B01J20/30B01J23/80C02F101/10C02F101/14C02F101/30
CPCB01J20/06B01J23/002B01J23/80B01J2523/00C02F1/00C02F1/281C02F2101/103C02F2101/14C02F2101/30B01J2523/17B01J2523/27B01J2523/842
Inventor 朱志良芦洪涛仇雁翎
Owner TONGJI UNIV
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