Cerium-doped iron oxyhydroxide modified titanium foam material, preparation method thereof, and application in water treatment

A technology of foamed titanium and iron oxide, which is applied in water/sewage treatment, water treatment parameter control, chemical instruments and methods, etc., can solve the problem that iron oxyhydroxide is not effectively fixed, achieve good reusability, improve activity, Effect of improving adsorption and oxidation capacity

Active Publication Date: 2021-08-17
SHENGSHI LANDSCAPE GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

"Journal of Environmental Engineering" published in February 2014 the performance and mechanism of iron oxyhydroxide coagulation adsorption and phosphorus removal generated by in-situ hydrolysis, using ferric chloride and sodium hydroxide solution to generate iron oxyhydroxide in situ, and form hydroxyphosphoric acid with phosphorus in water iron complexes, thereby promoting the removal of phosphorus; however, iron oxyhydroxide is not effectively fixed in this method, and further separation and removal of precipitates are required after phosphorus removal by this method

Method used

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  • Cerium-doped iron oxyhydroxide modified titanium foam material, preparation method thereof, and application in water treatment

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A preparation method for modifying titanium foam material doped with cerium-doped iron oxyhydroxide, comprising the following steps:

[0032] A three-electrode system is formed by using titanium foam as the working electrode, platinum as the counter electrode, and a saturated calomel electrode as the reference electrode. The aqueous solution containing ferric chloride, cerium chloride, sodium sulfate, polyvinylpyrrolidone and hydrogen peroxide Electrolyte, using cyclic voltammetry from -0.85±0.05 V to 0.5±0.05V vs. SCE potential range, sweeping 20 times at a sweep rate of 150 mV / s, then taking out the working electrode and washing it with deionized water for 3 The second time, dry it with nitrogen to get the foamed titanium material doped with cerium-doped iron oxyhydroxide, denoted as (Ce-Fe)O x h y / Ti; Among them, the molar concentrations of ferric chloride, cerium chloride, sodium sulfate and hydrogen peroxide in the electrolyte are 7.5 mmol / L, 1.5 mmol / L, 0.15 mol...

Embodiment 2

[0034] A method for preparing foamed titanium material doped with cerium-doped iron oxyhydroxide, prepared according to the method of Example 1, the difference is only in changing the electrolyte, that is: the concentration of ferric chloride, cerium chloride, sodium sulfate and hydrogen peroxide in the electrolyte The molar concentrations were 8 mmol / L, 1 mmol / L, 0.15 mol / L, and 0.9 mol / L, respectively, and the mass fraction of polyvinylpyrrolidone was 2%.

Embodiment 3

[0036] A method for preparing foamed titanium material doped with cerium-doped iron oxyhydroxide, prepared according to the method of Example 1, the difference is only in changing the electrolyte, that is: the concentration of ferric chloride, cerium chloride, sodium sulfate and hydrogen peroxide in the electrolyte The molar concentrations were 10 mmol / L, 1 mmol / L, 0.15 mol / L, and 1.1 mol / L, respectively, and the mass fraction of polyvinylpyrrolidone was 3%.

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Abstract

The invention discloses a titanium foam material modified with cerium-doped iron oxyhydroxide and a preparation method thereof. A titanium foam plate is used as a working electrode, a platinum sheet is used as a counter electrode, and a saturated calomel electrode is used as a reference electrode to form a three-electrode system. The aqueous solution of cerium chloride, sodium sulfate, polyvinylpyrrolidone and hydrogen peroxide is used as the electrolyte, and the cyclic voltammetry is used to sweep the circle, and then the working electrode is taken out, washed and dried to obtain the final product; the invention also discloses the doped Application of cerium iron oxyhydroxide modified titanium foam material in water treatment. The invention uses porous titanium foam as a matrix, and the surface is modified with cerium-doped iron oxyhydroxide, which improves the applicability and activity of iron oxyhydroxide, has higher porosity, adsorption and oxidation capabilities, and can be used as an adsorption filler, filter core or electrode When used in water treatment, it will not cause secondary pollution to the treated water, and the preparation process has good controllability and stability.

Description

technical field [0001] The invention belongs to the technical field of water treatment materials, and in particular relates to a foam titanium material doped with cerium-doped iron oxyhydroxide, a preparation method thereof, and an application in water treatment. Background technique [0002] With the rapid development of social economy, the contribution of industry is indispensable. However, with the rapid development of industry, the discharge of industrial wastewater has repeatedly hit new highs. The acceleration of urbanization has also increased the urban population in a short period of time, and domestic wastewater has also shown a trend of rapid growth. However, compared with the rapid growth of the total amount of industrial wastewater and domestic wastewater, the city's sewage treatment capacity is seriously lagging behind, and has not increased correspondingly with the rapid growth of industrial wastewater and domestic wastewater. Due to the pressure of industrial...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/28B01J20/06B01J20/30C02F1/28C02F1/461C02F1/00C02F3/32
CPCB01J20/06B01J20/28054B01J20/28057B01J20/28064C02F1/001C02F1/281C02F1/46109C02F3/32C02F2201/4614C02F2201/4615C02F2209/06C02F2209/08C02F2209/14C02F2209/16C02F2209/18
Inventor 游海龙周秉彦李玉鹏涂琴贾瑞文袁俊
Owner SHENGSHI LANDSCAPE GRP CO LTD
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