Preparation method and application of modified phosphate adsorbent

A phosphate adsorbent and modification technology, applied in chemical instruments and methods, adsorption water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of complex preparation methods, and achieve simple and easy preparation methods, Broad application prospects, excellent adsorption effect

Inactive Publication Date: 2015-09-23
HOHAI UNIV
View PDF6 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It uses eggshells as the basic raw material waste to be used in the treatment of wastewater phosphate. It has the characteristics of wide source of materials, waste utilization, pollution-free and green environmental protection, etc., but the preparation method is complicated

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Add attapulgite to 0.1-2mol / L potassium hydroxide solution, so that the mass volume ratio added is 0.25g / ml, stir and react at room temperature for 1.5h, then centrifuge to remove the supernatant, heat up to 300°C, and store in a nitrogen environment Medium firing, the heating rate is 50°C / min, the firing time is 3h, then naturally cooled in nitrogen environment, crushed to obtain attapulgite powder;

[0028] Put the attapulgite powder obtained above into a muffle furnace at 600°C for high-temperature burning, set the burning time to 30 minutes, then take it out quickly, and evenly spray 10 mL of polyaluminum chloride solution with a concentration of 25 mg / L to make the attapulgite powder and The mass volume ratio of the sprayed polyaluminum chloride solution is 0.02g / ml, and it is burned again at 400°C for 3 hours to obtain the modified attapulgite powder;

[0029] The modified attapulgite powder obtained above is ground to obtain the modified phosphate adsorbent.

[...

Embodiment 2

[0032] Add attapulgite to 0.5mol / L potassium hydroxide solution so that the mass volume ratio added is 0.14g / ml, stir and react at room temperature for 0.5h, then centrifuge to remove the supernatant, heat up to 200°C, and place in a nitrogen environment Firing, the heating rate is 25°C / min, and the firing time is 6h, then naturally cooled in a nitrogen environment, crushed, and attapulgite powder is obtained;

[0033] Put the attapulgite powder obtained above into a muffle furnace at 400°C for high-temperature burning, set the burning time to 30 minutes, then take it out quickly, and evenly spray 25mL of polyaluminum chloride solution with a concentration of 100mg / L, so that the attapulgite powder and The mass volume ratio of the sprayed polyaluminum chloride solution is 0.1g / ml, and it is burned again at 200°C for 6 hours to obtain the modified attapulgite powder;

[0034] The modified attapulgite powder obtained above is ground to obtain the modified phosphate adsorbent.

...

Embodiment 3

[0037] Add attapulgite to 0.5mol / L potassium hydroxide solution so that the mass volume ratio added is 0.5g / ml, stir and react at room temperature for 0.5h, then centrifuge to remove the supernatant, heat up to 400°C, and place in a nitrogen environment Firing, the heating rate is 25°C / min, and the firing time is 9h, then naturally cooled in nitrogen environment, crushed to obtain attapulgite powder;

[0038] Put the attapulgite powder obtained above into a muffle furnace at 600°C for high-temperature burning, set the burning time to 60 minutes, then take it out quickly, and evenly spray 50 mL of polyaluminum chloride solution with a concentration of 10 mg / L to make the attapulgite powder and The mass volume ratio of the sprayed polyaluminum chloride solution is 0.1g / ml, and it is fired again at 400°C for 9 hours to obtain the modified attapulgite powder;

[0039] The modified attapulgite powder obtained above is ground to obtain the modified phosphate adsorbent.

[0040]Take...

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
particle size (mesh)aaaaaaaaaa
concentrationaaaaaaaaaa
concentrationaaaaaaaaaa
Login to view more

Abstract

The invention discloses a preparation method and application of a modified phosphate adsorbent. Attapulgite which is rich and low in coat is taken as a raw material, is treated under high temperature by using a potassium hydroxide-combined tube furnace in advance, and is then modified for the second time by using aluminium polychlorid. The obtained modified phosphate adsorbent is thrown into phosphate wastewater, and thereby phosphate in the phosphate wastewater can be removed by adsorption. The modification method sufficiently utilizes the inherent characteristics of attapulgite, a research finds that the wastewater phosphate removal rate of the modified phosphate adsorbent obtained by the method reaches more than 90 percent, moreover, the method is simple, and is easy to implement, and the invention has a very broad application prospect.

Description

technical field [0001] The invention belongs to the technical field of water treatment and purification, and in particular relates to a preparation method of a modified phosphate adsorbent and its application in the field of water treatment. Background technique [0002] Phosphorus is a limiting nutrient element needed by aquatic organisms. With the modernization of our country and the rapid economic development, the use of phosphate has been involved in all aspects of our lives. As an important food ingredient and functional additive, it is widely used in food processing , in detergents and fertilizers. But the ensuing excessive discharge problem is easy to breed organic matter, such as algae and bacteria, which leads to eutrophication of water body. At present, the main sources of phosphorus in water bodies are mainly concentrated in the discharge of domestic sewage, industrial wastewater, and urban rainfall runoff discharged through drainage pipes. In addition, it also c...

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
Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/12B01J20/30C02F1/28C02F1/58
Inventor 操家顺谢坤林俊雄方芳薛朝霞冯骞李超
Owner HOHAI UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap