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Preparation method of adsorbent and application of adsorbent to heavy metal adsorption

An adsorbent, heavy metal technology, applied in chemical instruments and methods, adsorbed water/sewage treatment, other chemical processes, etc., can solve problems such as poor adsorption capacity, and achieve enhanced adsorption capacity, increased specific surface area, and good hydrothermal stability. Effects of sex and chemical stability

Inactive Publication Date: 2018-07-20
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In view of this, the present invention provides a preparation method of an adsorbent and its application in heavy metal adsorption, which is used to solve the technical defect of poor adsorption capacity of metal-organic framework adsorbents in the prior art

Method used

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  • Preparation method of adsorbent and application of adsorbent to heavy metal adsorption
  • Preparation method of adsorbent and application of adsorbent to heavy metal adsorption
  • Preparation method of adsorbent and application of adsorbent to heavy metal adsorption

Examples

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Effect test

Embodiment 1

[0035] This embodiment is to prepare Form-UiO-66-NH 2 Specific examples of adsorbent product 1.

[0036] Weigh 0.85g of zirconium chloride and 0.65g of 2-aminoterephthalic acid into a glass beaker, add solvent 1, and heat at 60°C for 1.5h to obtain the first product 1. Among them, solvent 1 is composed of 95ml N,N-dimethylformamide (DMF), 0.5ml ultrapure water and 8.5ml formic acid.

[0037] The first product 1 was transferred to a polyethylene tetrafluoro reactor, placed in a constant temperature oven, and subjected to a hydrothermal synthesis reaction at 110° C. for 72 hours to obtain the second product 1 .

[0038] The second product 1 was cooled, washed with DMF, dried overnight at 65° C., ground for 15 min and sieved to obtain the third product 1 .

[0039] The third product 1 was activated at 190°C for 22 hours in a constant temperature oven to obtain Form-UiO-66-NH 2 Adsorbent product 1.

Embodiment 2

[0041] This embodiment is to prepare Form-UiO-66-NH 2 Specific examples of adsorbent product 2.

[0042] Weigh 0.9g of zirconium chloride and 0.7g of 2-aminoterephthalic acid into a glass beaker, add solvent 2, and heat at 70°C for 2h to obtain the first product 2. Among them, solvent 2 is composed of 105ml N,N-dimethylformamide (DMF), 0.2ml ultrapure water and 9ml formic acid.

[0043] The first product 2 was transferred to a polyethylene tetrafluoro reactor, placed in a constant temperature oven, and subjected to a hydrothermal synthesis reaction at 120° C. for 60 hours to obtain the second product 2 .

[0044] The second product 2 was cooled, washed with DMF, dried overnight at 60° C., ground for 30 min and sieved to obtain the third product 2 .

[0045] The third product 2 was activated at 210°C for 24 hours in a constant temperature oven to obtain Form-UiO-66-NH 2 Adsorbent product 2.

Embodiment 3

[0047] This embodiment is to prepare Form-UiO-66-NH 2 Specific examples of adsorbent product 3.

[0048]Weigh 0.65g of zirconium chloride and 0.66g of 2-aminoterephthalic acid into a glass beaker, add solvent 3, and heat at 65°C for 1 hour to obtain the first product 3. Among them, solvent 3 is composed of 100ml N,N-dimethylformamide (DMF), 0.3ml ultrapure water and 8.6ml formic acid.

[0049] The first product 3 was transferred to a polyethylene tetrafluoro reactor, placed in a constant temperature oven, and subjected to a hydrothermal synthesis reaction at 115° C. for 74 hours to obtain the second product 3 .

[0050] The second product 3 was cooled, washed with DMF, dried overnight at 70° C., ground for 20 min and sieved to obtain the third product 3 .

[0051] The third product 3 was activated at 205°C for 20 hours in a constant temperature oven to obtain Form-UiO-66-NH 2 Adsorbent products3.

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Abstract

The invention belongs to the field of heavy metal pollution control, and particularly relates to a preparation method of an adsorbent and application of the adsorbent to heavy metal adsorption. The invention provides the preparation method of the adsorbent. The preparation method comprises the follows: preparing materials, performing hydrothermal synthesis, post-treatment and activation. The invention further provides application of the absorbent prepared with the preparation method to adsorption of heavy metals in water. Experimental determination shows that a product prepared with the preparation method has an enlarged specific surface area and significantly enhanced adsorption capacity; meanwhile, the product still has good hydrothermal stability and chemical stability. With the preparation method of the absorbent, provided by the invention, the technical defect that in the prior art, a metal organic framework-based adsorbent has poor adsorption capacity is overcome.

Description

technical field [0001] The invention belongs to the field of heavy metal pollution control, and in particular relates to a preparation method of an adsorbent and its application in heavy metal adsorption. Further, it relates to a UiO-66-NH with formic acid added 2 (Form-UiO-66-NH 2 ) preparation method of adsorbent and its application in heavy metal adsorption. Background technique [0002] Heavy metal pollution is one of the important problems in sewage treatment. Heavy metals enter water bodies through natural forms such as mining, smelting, metal processing and chemical production wastewater, burning of fossil fuels, application of pesticides and fertilizers, and domestic garbage, as well as natural forms of geological erosion and weathering. In particular, man-made sources of pollution such as domestic garbage, as well as natural forms of geological erosion and weathering enter water bodies. [0003] Especially when the water body is polluted by heavy metals such as C...

Claims

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Application Information

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IPC IPC(8): B01J20/30B01J20/22C02F1/28C02F101/20C02F101/22
CPCB01J20/226C02F1/285C02F2101/20C02F2101/22
Inventor 吕文英王雅兰刘国光马丹陈丹妮
Owner GUANGDONG UNIV OF TECH
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