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

Preparation method, product and application of a spherical mercury-removing adsorbent

An adsorbent and mercury removal technology, applied in chemical instruments and methods, adsorption water/sewage treatment, other chemical processes, etc., can solve the problem of limited adsorption capacity of heavy metal ions, easy loss of adsorption effect, poor corrosion resistance of calcium alginate Poor and other problems, to achieve the effect of increased strength and hardness, reduced material loss, and low cost

Active Publication Date: 2018-11-30
HUAZHONG UNIV OF SCI & TECH
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its main adsorption principle is based on the chelation of polymer organic surface groups, and the adsorption capacity and the types of heavy metal ions adsorbed are very limited.
At the same time, the corrosion resistance of calcium alginate is also poor, and it is easy to lose its adsorption effect after long-term use.

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
  • Preparation method, product and application of a spherical mercury-removing adsorbent
  • Preparation method, product and application of a spherical mercury-removing adsorbent
  • Preparation method, product and application of a spherical mercury-removing adsorbent

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0031] The invention provides a preparation method of a spherical mercury-removing adsorbent, the preparation method comprising:

[0032] (1) Drop sodium alginate solution with a concentration of 0.2% to 50% into CaCl with a concentration greater than 0.001% 2 , Ca(NO 3 ) 2 Wait for the soluble medium strong acid calcium salt solution, and let it stand for 1h~10h until the sodium alginate and the calcium salt fully react, because there are carboxyl sites with strong complexing ability for calcium ions in sodium alginate, these carboxyl sites are in seaweed The calcium acid calcium skeleton is arranged in the form of an "egg box". Once a calcium ion approaches, the two adjacent carboxyl groups will respectively provide a vacant electron to pair with the calcium ion, and complex with a calcium ion in the form of a bridge, thus forming A gel structure connected by an interpenetrating network, finally forming calcium alginate gel balls with a diameter of 1 mm to 7 mm; the calciu...

Embodiment 1

[0041] The weight part of sodium alginate is 1 part, sodium alginate is added to 50 parts of water, and stirred evenly at 85 ° C until it is in a sol state; the sol is gradually dripped into a calcium salt solution (2% CaCl 2 solution), and let it stand for 4 hours until the calcium alginate is completely gelled; after the ball is washed with deionized water, the calcium alginate ball is placed in a modified solution (1% ammonium bicarbonate solution) and immersed 1 hour to modify the surface of calcium alginate pellets to generate CaCO 3 Nanocrystals; remove the moisture contained in the gel by 24h freeze-drying, and obtain surface-modified mercury-removing adsorbent microspheres with diameters ranging from 3 mm to 5 mm. The preparation steps are as follows: figure 1 shown.

[0042] In order to simplify the content of the invention, the preparation conditions of Example 2-Example 6 are listed in Table 1, and the methods and parameters not listed in the table are the same as ...

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
diameteraaaaaaaaaa
porosityaaaaaaaaaa
adsorption capacityaaaaaaaaaa
Login to View More

Abstract

The invention discloses a preparation method for a spherical demercuration adsorbent, and a product and an application thereof. The preparation method comprises the following steps: dropping a sodium alginate solution in concentration of 0.2%-50% into a calcium salt solution in the concentration above 0.001%; standing by till sodium alginate fully reacts with calcium salt, thereby acquiring calcium alginate gel balls with the diameter of 1mm-7mm; putting the calcium alginate gel balls into a modification solution and dipping for 0.1h-4h; causing HCO3<-> and CO3<2-> in the modification solution and Ca<2+> on the surfaces and in the pores of the calcium alginate gel balls co-precipitate to generate CaCO3 nanometer crystal on the surfaces and in the pores of the calcium alginate gel balls, thereby acquiring the spherical demercuration adsorbent. In the modification solution, the sum of molar concentration of HCO3<-> and CO3<2-> is 64.1mmol / L-256.4mmol / L. According to the invention, the surface of the calcium alginate gel ball is modified, so that the adsorption capacity and mechanical strength of the adsorbent can be improved. The adsorbent has the prospect of commercial utilization.

Description

technical field [0001] The invention belongs to the technical field of preparation and improvement of heavy metal adsorbents, and more specifically relates to a preparation method, product and application of a spherical mercury-removing adsorbent. Background technique [0002] In the process of industrial production, not only a large amount of CO will be produced 2 , SO x , NO x At the same time, a large amount of industrial wastewater will be discharged. This kind of wastewater is different from municipal sewage. It not only contains high concentrations of suspended solids and inorganic salts, but also contains a large amount of heavy metal ions, such as desulfurization wastewater, ash waste liquid, and factory sewage. If this wastewater is not treated separately Direct discharge into the environment will inevitably bring great harm to ecology and people's lives. Therefore, industrial wastewater must be treated separately and effectively for heavy metals before discharg...

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 Patents(China)
IPC IPC(8): B01J20/24B01J20/28B01J20/30C02F1/28C02F1/58
CPCB01J20/043B01J20/24B01J20/28019B01J20/28047C02F1/28C02F1/281C02F1/286
Inventor 彭阳龚勋徐明厚胡迎超黄经春李小敏毛明
Owner HUAZHONG UNIV OF SCI & TECH