Preparation method of carbon-base adsorbing material capable of selectively adsorbing copper ions

An adsorption material and selective technology, applied in chemical instruments and methods, adsorption water/sewage treatment, other chemical processes, etc., can solve the problem that the adsorption material selective adsorption coefficient is not ideal, harmful initiators and surfactants, toxic problem, to achieve the effect of high selectivity, high adsorption selectivity, and simple steps

Inactive Publication Date: 2015-05-06
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the above-mentioned synthesis process, not only toxic and harmful initiators and surfactants are used, but the selective adsorption coefficient of the prepared adsorption material is not ideal enough.

Method used

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  • Preparation method of carbon-base adsorbing material capable of selectively adsorbing copper ions
  • Preparation method of carbon-base adsorbing material capable of selectively adsorbing copper ions
  • Preparation method of carbon-base adsorbing material capable of selectively adsorbing copper ions

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Experimental program
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Effect test

Embodiment 1

[0022] Preparation of carbon-based adsorbent materials with selective adsorption for copper ions.

[0023] Mix tetraethylenepentamine (TEPA), cupric chloride, and glucose according to the molar ratio of 1:1:3~1:1:10 and stir evenly, then put them into the reaction kettle, and react at 180°C for 15 hours, and the obtained solids are used 0.01mol / L EDTA solution was repeatedly soaked and washed, and finally washed with absolute ethanol until the filtrate was colorless and transparent, and the washed solid was dried at 80°C to obtain the carbon-based adsorption material containing amino groups.

[0024] Such as figure 1 As shown, when TEPA, copper ions, and glucose were mixed at a molar ratio of 1:1:5, the carbon-based adsorbent material had the largest adsorption capacity for copper ions. Compared with non-ion imprinted adsorption materials and commercial activated carbon prepared under the same conditions, such as figure 2 As shown, the copper ion imprinted adsorption materi...

Embodiment 2

[0026] Selective adsorption experiments of carbon-based adsorbent materials prepared by copper ion imprinting.

[0027] In a 25-mL centrifuge tube, add 10 mL containing a certain concentration of Cu 2+ 、Cd 2+ 、Co 2+ 、Ni 2+ , Zn 2+ Ionic solutions (Cd(II), Co(II), Cu(II), Ni(II), Zn(II), 0.002mol / L), the exact concentrations are 2.39mmol, 2.18mmol, 2.11mmol, 2.12mmol , 2.03mmol, and then add 100mg of copper ion imprinted adsorption material, shake well, ultrasonic for 30min, stand for adsorption for 24h, and then detect the supernatant by ICP.

[0028] Experimental results such as image 3 As shown, the adsorption rate of the adsorption material prepared by the copper ion imprinting method for copper ions reached 84.4%, while the adsorption rates for the other four ions were all very small. 2+ to Cd 2+ 、Co 2+ 、Ni 2+ , Zn 2+ The ion-selective adsorption coefficients are 31.8, 90.2, 38.6, and 36.1, respectively, and the copper ion imprinted adsorption material has very ...

Embodiment 3

[0030] Effect of pH value on the adsorption capacity of copper ion imprinted template adsorption materials.

[0031] Use 0.1 mol / L hydrochloric acid solution to adjust the pH to 1-5, add 50 mg of copper ion imprinted adsorption material to 5 mL of copper ion solution with an initial concentration of (800 mg / L), ultrasonicate for 30 min, and let stand for adsorption for 24 h. After centrifugation, the supernatant was taken to measure the copper ion concentration Ce of the adsorbed solution by DDTC chromogenic method. Calculate the adsorption amount Q (mg / g) and the adsorption rate E according to the following formula.

[0032] Q=(C 0 -C e )V / m

[0033] E=(C 0 -C e ) / C0 *100%

[0034] where C 0 is the initial concentration of copper ions (g / L), C e is the adsorption equilibrium concentration of copper ion (g / L), V is the volume of the adsorption system (mL), and m is the mass of the adsorbent (g). When the amount of adsorption material is 10g / L and the concentration of ...

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Abstract

The invention discloses a preparation method of a carbon-base adsorbing material capable of selectively adsorbing copper ions. The preparation method comprises the following steps: uniformly mixing and stirring tetraethylenepentamine (TEPA), copper chloride and glucose in a mole ratio of 1:1:3-1:1:10; loading the mixture into a reaction kettle and reacting at 180 DEG C for 15 hours to obtain a solid substance; repeatedly soaking and washing the solid substance by 0.01mol / L of EDTA solution; and finally washing by absolute ethyl alcohol to obtain colorless transparent filtered liquid and drying the washed solid substance at 80 DEG C to obtain the carbon-base adsorbing material containing amino. According to the preparation method, maximum adsorption capacity of the material to copper ions is 33.3mg / g and the adsorption rate of the material to copper ions in a water system containing Cu<2+>, Cd<2+>, Co<2+>, Ni<2+> and Zn<2+> is up to 84.4%. The material has an excellent selective adsorption performance to copper ions, so that the copper ions can be effectively extracted or removed from sewage. The preparation method is characterized by simple, fast and efficient processes, and the selected material has excellent selective adsorption capability.

Description

technical field [0001] The invention relates to a synthesis method for preparing a carbon-based adsorption material with selective adsorption performance for copper ions by ion imprinting technology. The carbon-based adsorption material containing amino groups obtained by the method can be used for selective extraction or removal of water systems Copper ions. Background technique [0002] In recent years, with the rapid development of economy and industry, we are facing the crisis of globalization of resource utilization and environmental pollution. The excessive use of toxic heavy metal ions will inevitably discharge them into water, land and biological environments, which has brought serious environmental pollution problems. Among them, the discharge of industrial wastewater containing heavy metal ions is a major factor causing environmental pollution. Heavy metal ions are carcinogenic, disabled, and teratogenic, but they are expensive. Effective treatment and recycling a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/30C02F1/28C02F1/62
Inventor 石磊彭维程舸刘晓梅谢珍珍
Owner JILIN UNIV
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