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Preparation for thiol-functionalization MOFs material and application thereof in adsorption and removal of heavy metal ions in water

A heavy metal ion, functionalized technology, applied in the fields of adsorbed water/sewage treatment, mercaptan preparation, water pollutants, etc., can solve the problems of limiting the application of MOFs, low heavy metal ion adsorption, weak metal ion effect, etc.

Active Publication Date: 2015-12-23
江西智汇环境技术有限公司
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AI Technical Summary

Problems solved by technology

This is due to the lack of redundant coordination sites in MOFs, which leads to its weak effect on external metal ions, so the adsorption capacity of MOFs on heavy metal ions is not high.
This greatly limits the application of MOFs as heavy metal ion adsorbents.

Method used

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  • Preparation for thiol-functionalization MOFs material and application thereof in adsorption and removal of heavy metal ions in water
  • Preparation for thiol-functionalization MOFs material and application thereof in adsorption and removal of heavy metal ions in water
  • Preparation for thiol-functionalization MOFs material and application thereof in adsorption and removal of heavy metal ions in water

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Experimental program
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Embodiment 1

[0037] (1) in N 2 Under protection, 2 g of diethyl 2,5-dihydroxy-1,4-phthalate and 3.6 g of triethylenediamine (DABCO) were dissolved in 20 mL of dried N, N-dimethylacetamide ( DMA), cooled to 0°C in an ice bath; then in N 2 Under protection, 10 mL of DMA solution in which 3.8 g of N,N-dimethylthioformyl chloride was dissolved was slowly added dropwise to the above solution, keeping the reaction temperature at 0°C; then the mixture was stirred at room temperature for 16 hours to produce a white Precipitation, filtered, washed with water, dried in vacuum and stored;

[0038] (2) in N 2 Under protection, heat 0.65g of the white precipitate formed in the above (1) at 225°C for 1 hour to obtain a brown mixture, cool to 70°C and add 20mL of absolute ethanol, gradually cool to room temperature to obtain light brown crystals, filter and store in a dry place;

[0039] (3) Dissolve 1.3g of light brown crystals obtained in (2) above in 40mL of degassed 1.3M KOH in ethanol and water (...

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Abstract

The invention relates to a preparation method for a thiol-functionalization MOFs material and application thereof in adsorption and removal of heavy metal ions in water. The thiol-functionalization MOFs (UiO-66-SH) material can effectively adsorb and remove the ions of heavy metal such as copper, cadmium, lead, mercury in the water. The method comprises the steps that 1, thiol-modified terephthalic acid organic ligands are synthesized; 2, the thiol-functionalization MOFs material (UiO-66-SH) is synthesized through a solvothermal method; 3, the thiol-functionalization MOFs material (UiO-66-SH) serves as an adsorbing agent to be applied to adsorption and removal for the heavy metal ions such as copper, cadmium, lead, mercury in the water. The thiol-functionalization MOFs material can efficiently adsorb and remove the ions of heavy metal such as copper, cadmium, lead, mercury in the water, and compared with ordinary UiO-66, the adsorption property of the material is significantly improved; in addition, the material can selectively adsorb and remove mercury ions on the high-concentration condition, and novel application of the material is widened.

Description

technical field [0001] The invention belongs to the field of preparation of adsorbents for heavy metal pollutants in water bodies, and in particular relates to the preparation of a sulfhydryl functionalized MOFs material and its application for adsorbing and removing heavy metal ions in water bodies. Background technique [0002] Heavy metal ions (mainly referring to chromium, cadmium, copper, mercury, nickel, zinc, lead and other metal ions) have always been the main pollutants in my country's water sources and priority pollutants in water quality, and they are extremely harmful. Especially in recent years, incidents such as "arsenic poisoning", "blood lead", and "cadmium rice" have occurred frequently, shocking the people of the country. On July 12, 2010, the Environmental Protection Department of Fujian Province notified that the sewage tank of Zijinshan Copper Mine wet process plant under Zijin Mining Group Company leaked, and the dead fish and fish poisoning in the Ting...

Claims

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Application Information

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IPC IPC(8): C07C319/02C07C323/62C07F7/00B01J20/22B01J20/30C02F1/28C02F101/20
Inventor 罗旭彪丁琳罗胜联
Owner 江西智汇环境技术有限公司
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