Preparation method and application of porous kieselguhr adsorbing material

An adsorption material, diatomite technology, applied in the field of materials, achieves the effects of low energy consumption, simple and easy preparation method, and large adsorption capacity

Inactive Publication Date: 2015-04-08
LUDONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

According to the currently retrieved data, there is no report at home and abroad that the use of porous diatomite adsorption materials synergistically modified with hydroxyl and proline functional groups for the adsorption and separation of heavy metal ions

Method used

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  • Preparation method and application of porous kieselguhr adsorbing material
  • Preparation method and application of porous kieselguhr adsorbing material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 1. Preparation of Porous Diatomaceous Earth

[0026] Add acid-treated diatomite and proline into the reactor, start stirring at 200rpm, add thionyl chloride dropwise at -10°C, the mass ratio of porous diatomite and proline varies in the range of 1: 1. The mass ratio of porous diatomaceous earth to thionyl chloride varies from 1:5.8. After the dropwise addition of thionyl chloride, the reaction was continued for 2 hours, then naturally rose to room temperature for 12 hours, and then rotary evaporated at 60° C. for 60 minutes to obtain a porous diatomite adsorption material (I ).

[0027] 2. The application and effect of porous diatomite

[0028] Weigh the mass of 0.02g of the above-mentioned adsorption material I into a stoppered Erlenmeyer flask, add 2.0×10 -3 mol / L Au(III), Hg(II), Pb(II), Ni(II), Co(II), Zn(II) and Cd(II) aqueous solution 20mL, shake in an air bath shaker for 24 Hour. The concentration of remaining metal ions in the solution was determined by ato...

Embodiment 2

[0031] 1. Preparation of Porous Diatomaceous Earth

[0032] Add acid-treated diatomite and proline into the reactor, start the machine and stir at 220rpm, add thionyl chloride dropwise under the condition of -10°C, the mass ratio of porous diatomite and proline varies in the range of 1: 2. The mass ratio of porous diatomite to thionyl chloride varies from 1:5.8. After the dropwise addition of thionyl chloride was completed, the reaction was continued for 2 hours, then naturally rose to room temperature for 12 hours, and then rotary evaporated at 60°C for 60 minutes to obtain a porous diatomite adsorption material (II ).

[0033] 2. The application and effect of porous diatomite

[0034] Weigh 0.02g of the above-mentioned adsorption material II into a stoppered Erlenmeyer flask, add 2.0×10 -3 mol / L Au(III), Hg(II), Pb(II), Ni(II), Co(II), Zn(II) and Cd(II) aqueous solution 20mL, shake in an air bath shaker for 24 Hour. The concentration of remaining metal ions in the solut...

Embodiment 3

[0037] 1. Preparation of Porous Diatomaceous Earth

[0038] Add acid-treated diatomite and proline into the reactor, start the machine and stir at 250rpm, add thionyl chloride dropwise at -5°C, the mass ratio of porous diatomite and proline varies in the range of 1: 3. The mass ratio of porous diatomaceous earth to thionyl chloride varies from 1:7. After the dropwise addition of thionyl chloride was completed, the reaction was continued for 2 hours, then naturally rose to room temperature for 24 hours, and then rotary evaporated at 70°C for 60 minutes to obtain a porous diatomite adsorption material (III ).

[0039] 2. The application and effect of porous diatomite

[0040] Weigh 0.02g of the above-mentioned adsorbent material III into a stoppered Erlenmeyer flask, add 2.0×10 -3 mol / L Au(III), Hg(II), Pb(II), Ni(II), Co(II), Zn(II) and Cd(II) aqueous solution 20mL, shake in an air bath shaker for 24 Hour. The concentration of remaining metal ions in the solution was deter...

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Abstract

The invention discloses a preparation method of a porous kieselguhr adsorbing material which is synergistically modified by hydroxyl and a proline functional group for separating heavy metal ions. According to the preparation method, porous kieselguhr is modified by using the proline functional group at low temperature, and with the synergistic effect with hydroxyl, the adsorption separation property of the adsorbing material to heavy metal ions is effectively improved. The porous kieselguhr adsorbing material which is modified by double functional groups is simple in preparation operation, low in cost, good in adsorption effect on heavy metal ions in water, and can be widely popularized and used in fields such as heavy metal ion separation and recycling.

Description

technical field [0001] The invention relates to a dual-functional adsorption material, in particular to the preparation of a porous diatomite adsorption material synergistically modified by hydroxyl and proline functional groups and its application in the adsorption and separation of heavy metal ions, belonging to the field of materials. Background technique [0002] At present, with the increasing industrial scale, heavy metal ions in the water environment, such as mercury, chromium, lead, copper, etc., are more and more harmful to human health and ecological environment. Therefore, effectively removing these heavy metal ions from industrial wastewater has become a very urgent task in the field of environmental protection. The commonly used methods are electrolysis, ion exchange, chemical oxidation / reduction and adsorption, among which adsorption separation is an important chemical and physical method, because of its high cost performance, it is widely used in the treatment...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/30C02F1/28C02F1/62
CPCB01J20/14B01J20/28095C02F1/281
Inventor 殷平曹付军曲荣君刘希光徐强
Owner LUDONG UNIVERSITY
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