Preparation method of FeOOH/ MnO2@ diatomite composite material

A technology of composite materials and diatomite, applied in chemical instruments and methods, water/sewage treatment, adsorption water/sewage treatment, etc., can solve problems such as preparation methods that have not yet been seen, and achieve great theoretical and practical significance, production equipment Compared with the requirements, the effect of increasing the adsorption capacity

Active Publication Date: 2019-03-22
BEIJING UNIV OF TECH +1
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0006] So far, no relevant FeOOH / MnO 2 Related reports on the preparation method of diatomite composite material and its application in the treatment of arsenic-containing wastewater

Method used

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  • Preparation method of FeOOH/ MnO2@ diatomite composite material
  • Preparation method of FeOOH/ MnO2@ diatomite composite material
  • Preparation method of FeOOH/ MnO2@ diatomite composite material

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Embodiment 1

[0044] Embodiment 1 of the present invention provides a kind of FeOOH / MnO 2 The preparation method of @diatomite composite material specifically includes the following steps:

[0045] S1. Weigh 20.0g of diatomaceous earth and add it to a 500mL beaker, add 200mL of deionized water, stir magnetically for 10min, then add 5.0g of FeCl 3 Stir to dissolve, and adjust the pH value to 4.0 by adding ammonia water dropwise, then add 0.2 g of sodium dodecylbenzenesulfonate, disperse and dissolve to obtain a diatomite mixed solution;

[0046] S2. Weigh 4.5g ammonium persulfate and 5.0g potassium permanganate respectively, dissolve them in 10mL deionized water to prepare ammonium-manganese composite solution, then add the ammonium-manganese composite solution dropwise to step S1 at a rate of 50 drops / minute In the prepared diatomite mixed solution, stir for 20 minutes, mix evenly, then add 3.6g of urea, stir for 20min, mix evenly to obtain a diatomite composite solution;

[0047] S3. Put...

Embodiment 2

[0051] Embodiment 2 of the present invention provides a kind of FeOOH / MnO 2 The preparation method of @diatomite composite material specifically includes the following steps:

[0052] S1. Weigh 20.0g of diatomaceous earth and add it to a 500mL beaker, add 200mL of deionized water, stir magnetically for 10min, then add 8.0g of FeCl 3 Stir to dissolve, and adjust the pH value to 4.0 by adding ammonia water dropwise, then add 0.3g sodium dodecylbenzenesulfonate, disperse and dissolve to obtain a diatomite mixed solution;

[0053] S2. Weigh 6.5g of ammonium persulfate and 8.0g of potassium permanganate respectively, dissolve them in 10mL of deionized water to prepare an ammonium-manganese composite solution, and then add the ammonium-manganese composite solution dropwise to step S1 at a rate of 45 drops / minute In the prepared diatomite mixed solution, stir for 20 minutes, mix evenly, then add 3.6g of urea, stir for 20min, mix evenly to obtain a diatomite composite solution;

[0...

Embodiment 3

[0058] Embodiment 3 of the present invention provides a kind of FeOOH / MnO 2 The preparation method of @diatomite composite material specifically includes the following steps:

[0059] S1. Weigh 30.0g of diatomaceous earth and add it to a 500mL beaker, add 200mL of deionized water, stir magnetically for 10min, then add 8.0g of FeCl 3 Stir to dissolve, and adjust the pH value to 5.0 by adding ammonia water dropwise, then add 0.3 g of sodium dodecylbenzenesulfonate, disperse and dissolve to obtain a diatomite mixed solution;

[0060] S2. Weigh 6.5g of ammonium persulfate and 8.0g of potassium permanganate respectively, dissolve them in 10mL of deionized water to prepare an ammonium-manganese composite solution, and then add the ammonium-manganese composite solution dropwise to step S1 at a rate of 45 drops / minute In the prepared diatomite mixed solution, stir for 20 minutes, mix evenly, then add 5.0 g of urea, stir for 20 minutes, mix evenly to obtain a diatomite composite solut...

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Abstract

The invention discloses a preparation method of a FeOOH/ MnO2@ diatomite composite material. The preparation method comprises the steps of adding FeCl3 into diatomite suspension liquid, adjusting thepH value, and then adding sodium dodecylbenzenesulfonate; then, slowly dropwise adding an ammonium manganese composite solution prepared by dissolving ammonium persulfate and potassium permanganate indeionized water, stirring and adding urea to prepare a diatomite composite solution; enabling the diatomite composite solution to be subjected to a hydrothermal reaction so as to obtain the diatomitecomposite material. The nano-flowered linear FeOOH/MnO2@ diatomite composite material is deposited on a diatomite algae plate, so that the absorption sensitivity of diatomite matrix to heavy metal arsenic ions is improved, and the absorption capacity of the arsenic ions is significantly increased while the specific surface area is enlarged; by adding activated carbon powder, iron and carbon electrodes are formed by iron oxides on the surface of diatomite, so that electron transport is facilitated, the oxidation of the trivalent arsenic ions is realized, and the toxicity of the trivalent arsenic ions is further reduced; the preparation method has great theoretical and practical significance.

Description

technical field [0001] The invention belongs to the technical field of environmental materials, and relates to adsorption and purification of heavy metal ions and toxic degradation materials, in particular to a FeOOH / MnO 2 @Diatomite composite materials and their preparation methods and applications. Background technique [0002] The pollution control of heavy metal arsenic ions has always attracted great attention from all walks of life. On the one hand, arsenic will present different forms of acid radical anions in water under different pH conditions, and its safety threshold is extremely low, making it difficult to meet the standard treatment; On the one hand, its toxicity is very easy to migrate, that is, its toxicity can migrate and transform with the water body and soil in the biological chains of animals and plants, that is, in the process of using the adsorption method to treat wastewater containing heavy metal arsenic ions, its adsorption products (sludge, etc.) Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/14C02F1/28C02F1/72B01J20/30C02F101/10
CPCB01J20/06B01J20/14C02F1/281C02F1/72C02F2101/103
Inventor 杜玉成靳翠鑫江卓填李杨李强牛炎李生辉谷恒学
Owner BEIJING UNIV OF TECH
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