Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for removing phosphate in water by adsorption of magnetic Fe3O4@SiO2 composite particles modified by cerium oxide

A phosphate, cerium oxide technology, applied in chemical instruments and methods, adsorption water/sewage treatment, alkali metal oxides/hydroxides, etc., to achieve the effects of simple preparation, good economic and environmental benefits, and low cost

Inactive Publication Date: 2014-08-06
NANJING XIAOZHUANG UNIV
View PDF2 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But in the field of environmental engineering, magnetic Fe 3 o 4 SiO 2 Modified materials, especially Ce-Fe after oxide treatment 3 o 4 SiO 2 The use of composite nanoparticles for the separation and treatment of phosphate has not been reported yet

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for removing phosphate in water by adsorption of magnetic Fe3O4@SiO2 composite particles modified by cerium oxide
  • Method for removing phosphate in water by adsorption of magnetic Fe3O4@SiO2 composite particles modified by cerium oxide
  • Method for removing phosphate in water by adsorption of magnetic Fe3O4@SiO2 composite particles modified by cerium oxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Ceria-modified Fe 3 o 4 SiO 2 Synthesis of composite nanoparticles: Weigh 5 g of dry Fe 3 o 4 SiO 2 Nanoparticles were added to a 250ml three-necked flask, and 100ml deionized water was added, and ultrasonically dispersed for 15min. Press Ce 3+ with Fe 3 o 4 SiO 2 The mass ratio of nanoparticles was 1:2, and cerium nitrate hexahydrate was added into the flask, protected by nitrogen atmosphere, and reacted in a constant temperature water bath at 80°C for 2h. Then hexamethylenetetramine (HMT), Ce 3+ The molar ratio to HMT was 1:4, and the reaction was continued for 3 h under constant temperature with mechanical stirring. The modified Fe obtained after the reaction 3 o 4 SiO 2 After magnetic separation of the composite nanoparticles, they were washed with water several times. The washed modified Fe 3 o 4 SiO 2 The composite nanoparticles were vacuum-dried at 80°C, and then calcined at 300°C for 2h under the protection of nitrogen to obtain Ce-Fe 3 o 4 S...

Embodiment 2

[0033] With the Ce-Fe prepared in embodiment 1 3 o 4 SiO 2 Composite nanoparticles are used as adsorbents to treat phosphorus-containing polluted water. Adsorption is carried out in a closed container (volume 50ml), the mass ratio of adsorbent to sewage is 1:2500, pH=5.8-6.5, the initial concentration of phosphate is 5mg P / L, the adsorption temperature is 298K, and the adsorption time is 24h. The saturated adsorption capacity of phosphate was 19.2mg P / g.

Embodiment 3

[0035] Same as in Example 2, the initial concentration of phosphate is 10 mg P / L, and other conditions remain unchanged, the measured saturated adsorption capacity of phosphate is 28.8 mg P / g.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Magnetizationaaaaaaaaaa
Login to View More

Abstract

The invention discloses an application of magnetic core-shell structure Fe3O4@SiO2 composite nanometer particles modified by cerium oxide in the removal of phosphate in water. A method for removing phosphate in water comprises the steps of putting Ce-Fe3O4@SiO2 composite nanometer particles at 15-45 DEG C into phosphate-containing water of which the pH is 3-10 and adsorbing for 24-48 hours, wherein the concentration of phosphate pollutants in water is 1-60mg / L, and the mass ratio of Ce-Fe3O4@SiO2 composite nanometer particles to phosphate-containing water is 1: (2000-5000). Ce-Fe3O4@SiO2 disclosed by the invention has a good adsorption effect on phosphate, and moreover, the adsorbent is acid and alkali resistant, the adsorbent particles can be separated magnetically at the end of the adsorption and the processing efficiency is high.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and relates to a method for removing phosphate in water by adsorption, in particular to a magnetic iron oxide modified by cerium oxide. 3 o 4 SiO 2 Nanocomposite particles as an adsorbent for the removal of phosphate in water. Background technique [0002] Phosphorus is a nutrient element required for the growth of aquatic organisms, and it is also the main controlling factor leading to eutrophication of water bodies. Phosphorus exists in various forms in water, including organic phosphate, inorganic phosphate and polyphosphate, among which orthophosphate and polyphosphate are the main forms. As an important food ingredient and functional additive, phosphate is widely used in food processing, and can enter natural water bodies through various channels. Such as centralized discharge of domestic sewage and industrial wastewater, illegally dumped urban garbage and industrial waste, farml...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C02F1/28C02F1/58B01J20/10B01J20/28B01J20/30
Inventor 刘景亮曹晶晶常玉广王志勤陈欢胡耀娟王蓉蓉汪振炯徐丹喻敏丁爱芳刘钦普
Owner NANJING XIAOZHUANG UNIV