Carbonate modified diatomite adsorbent as well as preparation method and application thereof

A diatomite and adsorbent technology, which is applied in the field of carbonate modified diatomite adsorbent and its preparation, can solve the problems that it is difficult to take into account the high adsorption capacity and the pH requirement of the effluent, and achieve the benefits of large-scale production, Effect of reducing waste liquid and fast adsorption rate

Pending Publication Date: 2022-07-19
XIAMEN INST OF RARE EARTH MATERIALS +1
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Note: The pH value of ordinary river water and lake water is between 6 and 9)), it is difficult to take into account the high adsorption capacity and the effluent pH compliance requirements, resulting in La(OH) 3 Limitations on the application of base adsorbents

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
  • Carbonate modified diatomite adsorbent as well as preparation method and application thereof
  • Carbonate modified diatomite adsorbent as well as preparation method and application thereof
  • Carbonate modified diatomite adsorbent as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Embodiment 1. configure 3mol / L Na 2 CO 3 30 ml of the solution, 3 g of diatomaceous earth was added to the solution, and the mixture was stirred at room temperature for 3 hours. Prepare 0.1mol / L LaCl 3 solution 30ml, the LaCl 3 The solution was slowly added dropwise to the stirring diatomite solution, continued stirring at room temperature for 24 hours, and then stood for another 24 hours to fully precipitate lanthanum carbonate on the surface of the diatomite. The obtained solution was suction filtered and repeatedly rinsed with deionized water until the filtrate became neutral, and the filter cake was dried in a drying oven at 100° C. for 24 hours to obtain low-load lanthanum carbonate modified diatomite.

Embodiment 2

[0037] Embodiment 2. Configure 3mol / L Na 2 CO 3 30 ml of the solution, 3 g of diatomaceous earth was added to the solution, and the mixture was stirred at room temperature for 3 hours. Prepare 0.5mol / L LaCl 3 solution 30ml, the LaCl 3 The solution was slowly added dropwise to the stirring diatomite solution, continued stirring at room temperature for 24 hours, and then stood for another 24 hours to fully precipitate lanthanum carbonate on the surface of the diatomite. The obtained solution was suction filtered and repeatedly rinsed with deionized water until the filtrate was neutral, and the filter cake was dried in a drying oven at 100° C. for 24 hours to obtain a medium load of lanthanum carbonate modified diatomite.

Embodiment 3

[0038] Embodiment 3. Configure 3mol / L Na 2 CO 330 ml of the solution, 3 g of diatomaceous earth was added to the solution, and the mixture was stirred at room temperature for 3 hours. Prepare 1mol / L LaCl 3 solution 30ml, the LaCl 3 The solution was slowly added dropwise to the stirring diatomite solution, stirring was continued at room temperature for 24 hours, and then allowed to stand for another 24 hours to fully precipitate lanthanum carbonate on the surface of the diatomite. The obtained solution was suction filtered and repeatedly washed with deionized water until the filtrate was neutral, and the filter cake was dried in a drying oven at 100° C. for 24 hours to obtain high-loaded lanthanum carbonate-modified diatomite.

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

No PUM Login to view more

Abstract

The invention discloses a preparation method of a La-modified diatomite phosphorus removal adsorbent, which adopts diatomite as a porous support, so that generated lanthanum carbonate is nanocrystallized, the phosphorus adsorption capacity is effectively improved, and the phosphorus adsorption capacity of the modified diatomite is greatly improved within a proper pH range. According to the adding sequence of reactants, the generation process of the lanthanum carbonate-based compound can be controlled, so that phosphorus adsorption sites on the surface of the prepared adsorption material are more active, specific binding with phosphate radicals is easier to realize, and the adsorption material is not influenced by competitive ions. The adsorbent solves the problem that the effluent is alkaline after phosphorus removal by traditional diatomite loaded metal hydroxide, and has a good application prospect.

Description

technical field [0001] The invention belongs to the field of adsorbent preparation, and in particular relates to a carbonate-modified diatomite adsorbent and a preparation method and application thereof. Background technique [0002] Phosphorus is an essential nutrient element in water ecosystems, but excessive phosphorus discharge will cause serious water eutrophication, causing immeasurable harm to the ecological environment and human society. In order to reduce phosphorus pollution in water bodies, various countries and regions have stipulated strict phosphorus-containing wastewater discharge standards. The maximum phosphorus content in China's currently allowed wastewater is 0.5 mgP / L. [0003] At present, the common phosphorus removal methods mainly include chemical precipitation, biological treatment and adsorption methods. Among them, the chemical precipitation method will generate a large amount of chemical sludge that needs to be further processed, causing secondary...

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): B01J20/12B01J20/30C02F1/28C02F101/10
CPCB01J20/12B01J20/0207B01J20/0277C02F1/281C02F2101/105
Inventor 王维杨杰许肖锋黄有桂叶欣徐颖
Owner XIAMEN INST OF RARE EARTH MATERIALS
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