Preparation method of copper ion adsorbent based on metal-organic framework material

A metal-organic framework and copper ion technology, applied in chemical instruments and methods, adsorption water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of long time and low adsorption capacity of adsorbents, and achieve adsorption efficiency High and significant adsorption effect

Active Publication Date: 2016-04-06
YANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, people mainly use zeolite, silicon, organic adsorbent and activated carbon as adsorbents to adsorb heavy metal ions in wastewater, but these adsorbents have low adsorption capacity and long time

Method used

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  • Preparation method of copper ion adsorbent based on metal-organic framework material
  • Preparation method of copper ion adsorbent based on metal-organic framework material
  • Preparation method of copper ion adsorbent based on metal-organic framework material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Example 1 Preparation method of copper ion adsorbent based on metal organic framework material

[0027] (1) Pyrrole and methyl p-formylbenzoate were dissolved in propionic acid, the solution was refluxed for 12 h under dark room conditions, and the reaction mixture was cooled to room temperature. The product was dissolved in a mixed solution of tetrahydrofuran and methanol, added KOH solution, mixed and stirred for 12 hours, cooled to room temperature, evaporated tetrahydrofuran and methanol, added water until the solid was completely dissolved, added hydrochloric acid solution until no precipitation was formed, washed with water, and dried.

[0028] (2) Dissolve zirconium oxychloride in DMF and sonicate, add the product obtained in step (1) and sonicate for 10 minutes, add benzoic acid and transfer to a polytetrafluoroethylene-lined reaction kettle at 130° C. for 72 hours. After the reactant was cooled to room temperature, it was washed successively with DMF and aceton...

Embodiment 2

[0031] Embodiment 2 test result measurement

[0032] The mercapto-functionalized MOF adsorbent prepared in Example 1 was subjected to a copper adsorption test. Take 100mL of wastewater into a beaker, add 10mg of wastewater adsorbent to the wastewater, use NaOH or HNO 3 Adjust the pH of the solution to 5, shake and absorb at room temperature for 15 minutes, take the supernatant, and detect the remaining copper ion concentration in the supernatant by flame atomic absorption spectrometry. The removal rate of heavy metal ions w=(initial concentration-concentration after adsorption) / initial concentration, and the test results are shown in Table 1.

[0033] Table 1

[0034]

Initial concentration (mg / L)

Concentration after adsorption (mg / L)

sample 1

10

5.84

sample 2

9.0

4.90

sample 3

8.0

3.73

Sample 4

7.0

2.74

Sample 5

6.0

1.8

[0035] It can be seen from Table 1 that the wastewat...

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Abstract

The invention relates to a preparation method of a copper ion adsorbent based on a metal-organic framework material and discloses an inorganic-organic hybrid material for treating copper-containing wastewater and a preparation method thereof. The inorganic-organic hybrid material adsorbent is prepared by a post-synthetic modification method of a metal-organic framework. In comparison with other adsorption materials, the hybrid material has high adsorption capacity (42.70 mg / g). As a mercapto group is used as an adsorption site of the hybrid material, adsorption speed of metal ion is faster (15 min), and copper ion can be separated efficiently. In addition, the adsorbent has good stability and can be repeatedly used for at least 30 times. Thus, use cost is reduced.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a copper-containing wastewater adsorbent and a preparation method thereof. Background technique [0002] Copper is an essential trace element in living organisms, and has an important impact on the human nervous system and immune system. However, when the copper content in the human body is too high, and the concentration exceeds 1.3ppm, it will cause a burden on the organs in the body and maintain the human body. Metabolism disorder, liver cirrhosis, liver ascites are even more serious. [0003] There are many methods commonly used to deal with heavy metal copper, such as chemical precipitation, redox, coagulation, ion exchange and biological treatment. However, these treatment methods are limited in various aspects, and there are disadvantages such as secondary pollution, unsatisfactory effect, and unfavorable operation, which limit their application in heavy meta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/30B01J20/22C02F1/28C02F1/62
CPCB01J20/226B01J2220/48C02F1/288C02F1/62C02F2101/20
Inventor 王洋叶桂琴
Owner YANGZHOU UNIV
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