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Cerium-doped iron hydroxide modifying foam titanium material and preparing method and application thereof in water treatment

A foamed titanium and iron oxide technology, 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 repeated use effect and enhance bonding strength , the effect of improving the precipitation speed

Active Publication Date: 2019-01-25
SHENGSHI LANDSCAPE GRP CO LTD
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  • 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 hydroxide modifying foam titanium material and preparing method and application thereof in water treatment

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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±0.05 V 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 mo...

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 cerium-doped iron hydroxide modifying foam titanium material and a preparing method thereof. A three-electrode system is formed with a foam titanium plate serving as a working electrode, a platinum sheet serving as a counter electrode and a saturated calomel electrode serving as a reference electrode. An aqueous solution containing ferric chloride, cerium chloride, sodiumsulfate, polyvinylpyrrolidone and hydrogen peroxide serves as an electrolyte solution, cyclic voltammetry is adopted for cyclic circle sweeping, and then a working electrode is taken out, washed anddried to obtain the cerium-doped iron hydroxide modifying foam titanium material. The invention further discloses application of the cerium-doped iron hydroxide modifying foam titanium material in water treatment. According to the cerium-doped iron hydroxide modifying foam titanium material and the preparing method and application thereof, porous foam titanium serves as a matrix, cerium-doped ironhydroxide modifies the surface, and the applicability and activity of iron hydroxide are improved; the cerium-doped iron hydroxide modifying foam titanium material has high porosity and adsorption and oxidation capacity, can serve as adsorbing filler, filter elements or electrodes to be applied to water treatment, secondary pollution to the treated water cannot be caused, and the preparing process has high 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 Applications(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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