Application of a uio-66/polyaromatic composite material

A technology of uio-66 and composite materials, which is applied in the field of environmental engineering, can solve the problems of low specific surface area and limited application of polyarylamine, and achieve the effects of low cost, improved adsorption performance, and improved oxidation polymerization efficiency

Active Publication Date: 2020-09-01
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the specific surface area of ​​the synthesized polyarylamine is very low, only a dozen to tens of m 2 / g, which greatly limits its application

Method used

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  • Application of a uio-66/polyaromatic composite material
  • Application of a uio-66/polyaromatic composite material
  • Application of a uio-66/polyaromatic composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] Accurately weigh 600mg Uio‐66 and add it to a 250ml round bottom flask, add 150ml distilled water and stir and ultrasonically disperse, then accurately weigh 300mg m-phenylenediamine monomer and 300mg sodium dodecyl sulfonate and add to the above flask , Stir for 16h to make full contact. Accurately weigh 900mg of sodium persulfate and dissolve it in 50ml of distilled water to fully dissolve it, and take 37ml for use. Within about 15 minutes, the sodium persulfate solution was gradually added dropwise to the round bottom flask to initiate oxidative polymerization. The above reaction continued for 5 hours at room temperature (about 20°C), and the reaction system gradually changed from white to dark brown. After the reaction, it is obtained by centrifugal separation (rotational speed is 8000 rpm), and the residual sodium persulfate and sodium dodecyl sulfonate are washed away with distilled water. The product was dried in an oven for 12 hours, and the resulting black sol...

Embodiment 2

[0069] Accurately weigh 200mg Uio‐66 and add it to a 250ml round bottom flask, add 150ml of distilled water and stir and ultrasonically disperse, then accurately weigh 600mg of m-phenylenediamine monomer and 200mg of sodium dodecyl sulfonate and add to the above flask , Stir for 16h to make full contact. Accurately weigh 1.8g of sodium persulfate and dissolve it in 50ml of distilled water to fully dissolve it, and take 37ml for use. Within about 15 minutes, the sodium persulfate solution was gradually added dropwise to the round bottom flask to initiate oxidative polymerization. The above reaction continued for 5 hours at room temperature (about 20°C), and the reaction system gradually changed from white to dark brown. After the reaction, it is obtained by centrifugal separation (rotational speed is 8000 rpm), and the residual sodium persulfate and sodium dodecyl sulfonate are washed away with distilled water. The product was dried in an oven for 12 hours, and the black solid...

Embodiment 3

[0071] Accurately weigh 200mg Uio‐66 and add it to a 250ml round bottom flask, add 150ml distilled water and stir and ultrasonically disperse, then accurately weigh 200mg m-phenylenediamine monomer and 200mg sodium dodecyl sulfonate and add it to the above flask , Stir for 16h to make full contact. Accurately weigh 600mg of sodium persulfate and dissolve it in 50ml of distilled water to fully dissolve it, and take 37ml for use. Within about 15 minutes, the sodium persulfate solution was gradually added dropwise to the round bottom flask to initiate oxidative polymerization. The above reaction continued for 5 hours at room temperature (about 20°C), and the reaction system gradually changed from white to dark brown. After the reaction, it is obtained by centrifugal separation (rotational speed is 8000 rpm), and the residual sodium persulfate and sodium dodecyl sulfonate are washed away with distilled water. The product was dried in an oven for 12 hours, and the black solid powd...

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Abstract

The invention discloses application of a Uio-66 / polyaromatic composite material in treating wastewater containing hexavalent Cr. The Uio-66 / polyaromatic composite material is characterized in that anadsorbent is dissolved into an aqueous solution and an aromatic amine monomer is formed on the surface of Uio-66 through an in situ chemical oxidation polymerization method. The prepared Uio-66 / polyaromatic composite material has the advantages of simple synthesis process, low cost, high yield, good removal effect on Cr(VI) in water and no secondary pollution. At room temperature, the maximum adsorption capacity of the adsorbent can reach 263.69mg / g, and the removal rate can reach 99 percent or above which is higher than that of non-composite Uio-66 and majority reported chromium adsorption materials. Acidic wastewater containing Cr(VI) is treated by adopting the method disclosed by the invention; the method has the characteristics of simple process, convenience in operation, good economicbenefits and the like.

Description

Technical field [0001] The invention belongs to the technical field of environmental engineering and relates to an application method of a Uio-66 / polyaromatic amine composite material adsorbent in the treatment of hexavalent Cr wastewater. Background technique [0002] Industries such as electroplating, tanning, metallurgy, and chemical production discharge a large amount of chromium-containing wastewater to the environment every year. Among chromium-containing acidic wastewater, chromium (VI) is mainly composed of Cr 2 O 7 2- And CrO 4 2- The form exists. Chromium (VI) is extremely harmful, carcinogenic, teratogenic, and mutagenic, and seriously endangers human health, ecological balance and sustainable economic and social development. Chromium pollution has attracted widespread attention worldwide. Therefore, my country's "Integrated Wastewater Discharge Standard" (GB8978-1996) stipulates that the maximum allowable discharge concentration of chromium (VI) and total chromium are...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/26B01J20/28B01J20/30C02F1/28C02F101/22
CPCB01J20/226B01J20/262B01J20/28016B01J20/28061C02F1/285C02F2101/22
Inventor 王海鹰侯兰晶柴立元杨卫春廖骐颜旭王升史美清唐崇俭杨志辉
Owner CENT SOUTH UNIV
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