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Application of carboxylation graphene oxide serving as adsorbent in metal ion adsorption

A graphene and adsorbent technology, applied in other chemical processes, chemical instruments and methods, water/sludge/sewage treatment, etc., can solve problems such as unreported, and achieve easy availability of raw materials, simple preparation methods, and good performance. Effect

Inactive Publication Date: 2018-01-05
信阳学院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the use of carboxylated graphene oxide as an adsorbent has not been reported

Method used

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  • Application of carboxylation graphene oxide serving as adsorbent in metal ion adsorption
  • Application of carboxylation graphene oxide serving as adsorbent in metal ion adsorption
  • Application of carboxylation graphene oxide serving as adsorbent in metal ion adsorption

Examples

Experimental program
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Effect test

Embodiment 1

[0023] The specific steps of the preparation method of carboxylated graphene oxide material are as follows:

[0024] S1: Add graphene oxide to deionized water, and disperse to obtain an aqueous solution of graphene oxide; S2: Add sodium hydroxide and chloroacetic acid to the aqueous solution of graphene oxide, and stir at room temperature for 24 hours; S3: Wash with deionized water Several times, the carboxylated graphene oxide material was obtained after drying.

[0025] Step S1 specifically includes: ultrasonically dispersing in a 200W ultrasonic cleaner for 30 minutes to obtain an aqueous solution of graphene oxide; in addition, the concentration of graphene oxide is 1 mg / mL.

[0026] In step S2, the addition amount of each component is: graphene oxide: sodium hydroxide: chloroacetic acid: 50mg: 3g: 2g.

[0027] In step S3, the drying process is specifically to dry the product under vacuum at 60° C. for 12 hours.

[0028] The structure of the carboxylated graphene oxide m...

Embodiment 2

[0033] Determination of Adsorption Ability of Carboxylated Graphene Oxide on Cu(Ⅱ) or Pb(Ⅱ) Metal Ions by Atomic Absorption Spectrophotometry

[0034] Accurately weigh 3 mg of carboxylated graphene oxide material and add it to 10 mL of pH=4.00, 1.5 mmol / L solution of Cu(II) or Pb(II) ions, stir at 25°C for 45 minutes, and use a 220 nm microporous filter to The membrane filter out the adsorbent to obtain a clarified solution, and then use an atomic absorption spectrophotometer to detect the metal ion content of the clarified solution, and calculate the content change of the metal ion content before and after treatment, so as to calculate the effect of carboxylated graphene oxide on divalent metal ions the amount of adsorption. At the same time, using unmodified graphene oxide as a comparative example, the same method was used to treat the same industrial wastewater.

[0035] The adsorption amount of carboxylated graphene oxide to metal ions is calculated according to the follo...

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Abstract

The invention provides application of carboxylation graphene oxide serving as an adsorbent in metal ion adsorption and belongs to the technical field of wastewater treatment. The application comprisesthe steps of utilizing a classical Hummers method to prepare graphene oxide, then mixing the graphene oxide with chloroacetic acid under the alkali condition, stirring in 25 DEG C constant-temperature water bath, centrifugally washing and drying to prepare the carboxylation graphene oxide. The carboxylation graphene oxide has the advantages of simple preparation method, raw materials easy to obtain, moderate reaction conditions, simple treatment technology and further good performance in a wastewater treatment aspect.

Description

technical field [0001] The invention relates to the application of carboxylated graphene oxide as an adsorbent in the adsorption of metal ions, in particular to the application of adsorption of metal ions in industrial wastewater, and belongs to the technical field of sewage treatment. Background technique [0002] Heavy metals usually exist in nature in the form of simple substances or compounds, which pose little threat to ecology and human health; however, with the over-exploitation of metal minerals in recent years, industrial wastewater containing a large amount of metal ions has been produced. [0003] Take the heavy metal copper as an example. Copper is an indispensable micronutrient for human health and one of the strategic elements in the industrial field. In nature, copper mainly exists in the form of copper ore, which is widely used in electrical, light industry, machinery manufacturing, construction industry, national defense industry and other fields. However, ...

Claims

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Application Information

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IPC IPC(8): B01J20/22B01J20/30C02F9/02C02F101/20
Inventor 张秋平张文银孙帅博董钟张佳慧
Owner 信阳学院
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