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A metal oxide iron-copper composite modified quartz sand filter material and its preparation method and application

A composite modification, quartz sand technology, applied in chemical instruments and methods, silicon compounds, separation methods, etc., to achieve the effects of reducing costs, reducing energy consumption, and shortening preparation time

Inactive Publication Date: 2017-12-26
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the defects and technical deficiencies of the existing composite modified filter material, and provide a composite modified quartz sand filter material with large adsorption capacity, high adhesion strength and better adsorption effect

Method used

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  • A metal oxide iron-copper composite modified quartz sand filter material and its preparation method and application
  • A metal oxide iron-copper composite modified quartz sand filter material and its preparation method and application
  • A metal oxide iron-copper composite modified quartz sand filter material and its preparation method and application

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Experimental program
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Effect test

Embodiment 1

[0052] Embodiment 1 Preparation of metal oxide iron-copper composite modified quartz sand filter material

[0053] 1. Materials required for the preparation of metal oxide composite modified sand

[0054] (1) The required materials are shown in Table 1.

[0055] Table 1

[0056]

[0057] (2) Handling of test materials

[0058] Ordinary quartz sand (RQS): sieve with a diameter of 0.9-1.43mm, pickle with pH=1 HCl solution for 24 hours, then wash with distilled water until neutral, then dry in an oven at 110°C, cool at room temperature and put it into a polyethylene bottle ready for use.

[0059] Ferric chloride modifier (FeCl 3 ): Accurately weigh 270.5g of ferric chloride hexahydrate (analytical grade) and dissolve in distilled water, transfer to a 500mL volumetric flask, distill the water to 500mL, shake well, the concentration of ferric chloride in this solution is 2.000mol / L . The amount of ferric chloride added per gram of quartz sand is called the ferric chloride ...

Embodiment 2

[0079] Example 2 BET specific surface area and morphology of metal oxide iron-copper composite modified quartz sand filter material

[0080] 1. The size of the specific surface area reflects the size of the particle loading capacity, and the size of the specific surface area is determined by S BET value to measure. Use the BET specific surface area tester F-Sorb2400 to measure the specific surface area of ​​ordinary quartz sand and metal composite oxide modified sand, and calculate the ratio of the specific surface area of ​​the modified sand to the specific surface area of ​​ordinary quartz sand. sexual effect. It can be obtained from Table 6 that the specific surface area of ​​metal oxide composite modified sand is 8.96 times that of ordinary quartz sand.

[0081] The BET specific surface area measurement result of table 6 filter sand

[0082]

[0083] 2. The physical picture of metal oxide composite modified sand figure 2 , The particle size range of the metal oxide...

Embodiment 3

[0084] SEM scanning electron microscope picture of metal oxide composite modified sand image 3 , combining Table 6 and image 3 (a), the surface of ordinary quartz sand is smooth, the specific surface area is small, and the adsorption capacity is small. image 3 (b) and (c) are scanning electron microscope images of the surface of composite modified quartz sand enlarged by 5000 and 10000 times. It can be seen that the surface of metal oxide composite modified sand has very clear and dense pores, and the specific surface area is 0.959, which is ordinary quartz. 8.96 times that of sand, and has a larger adsorption capacity than ordinary quartz sand. The substance attached to the surface of the modified quartz sand is Fe 2 o 3 and CuO, making metal oxides successfully modified on the surface of ordinary quartz sand, Fe 3+ and Cu 2 + The positive charge on the surface of ordinary quartz sand is increased, which has a very good adsorption effect on negative charge organic po...

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Abstract

The invention discloses a metal oxide iron-copper composite modified quartz sand filter material and its preparation method and application. Specifically, ferric chloride and copper sulfate are used as modifiers, and at the same time microwave technology is used to modify the quartz sand. The metal oxide iron-copper composite modified quartz sand filter material was prepared. The modified quartz sand filter material prepared by the present invention can effectively adsorb organic and inorganic pollutants, heavy metals, phosphorus, etc. in water, and its specific surface area is 8.96 times that of ordinary quartz sand, and has a larger adsorption capacity than ordinary quartz sand; The removal rate of acid is 96.58%, which is 67.86% higher than that of ordinary quartz sand for humic acid; the removal rate of phosphorus in water is 71.5%~96.23%. In addition, the modified quartz sand has higher adhesion strength to pollutants and lower surface metal desorption rate; moreover, the production cost is low, the investment cost is low, and it is convenient for industrialized production.

Description

technical field [0001] The invention belongs to the technical field of modified filter material. More specifically, it relates to a novel metal oxide iron-copper composite modified quartz sand filter material and its preparation method and application. Background technique [0002] The modified filter material is mainly to attach an active modifier to the surface of the quartz sand through a chemical reaction, thereby changing the properties of the original filter material surface, and making a modified filter material with excellent adsorption performance and pollution interception ability, so as to improve the removal of the filter material. The purpose of organic pollutants and heavy metal substances in water. [0003] At present, the modification technology at home and abroad mainly uses iron salts and aluminum salts as modifiers, and changes the surface potential of the filter particles and the internal structure of the metal medium by alkaline deposition, high-tempera...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D39/06B01J20/10B01J20/30C02F1/28
Inventor 李冬梅杨翾王逸之李国浩任毅刘贝梅胜
Owner GUANGDONG UNIV OF TECH
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