Preparation method and application of graphene film composite activated aluminum oxide adsorbent adsorbing heavy metal ions and organic matter from waste water

A technology of activated alumina and heavy metal ions, which is applied in chemical instruments and methods, adsorption water/sewage treatment, water pollutants, etc. The effect of short adsorption time, easy recycling and high adsorption efficiency

Inactive Publication Date: 2017-02-22
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, graphene, as a nanomaterial, may cause secondary pollution when it adsorbs heavy metal ions, which is not conducive to water purification. Due to its uncontrollability in subsequent processing, it is difficult for nanomaterials to be widely used.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The preparation method of graphene membrane composite active alumina adsorbent, it comprises the steps:

[0019] 1) Substrate pretreatment: use activated alumina as the substrate, add it to 3wt% polypropylene alcohol, and react at 40°C for 2 hours under continuous stirring, so that the surface of activated alumina is rich in hydroxyl groups, and place it in an oven After drying at 50°C, the pretreated matrix was obtained, ready for use:

[0020] 2) Preparation of graphene membrane composite activated alumina: immerse the pretreated substrate in an ethanol solution containing γ-aminopropyltrimethoxysilane coupling agent with a volume concentration of 1%, at 50°C, in a continuous React for 10 hours under stirring, take out the substrate, dry it, then add it to an organic solution containing 5wt% graphene, and react at 100°C for 10 hours to obtain a graphene membrane composite activated alumina adsorbent.

[0021] The graphene film composite activated alumina adsorbent sa...

Embodiment 2

[0026] The preparation method of graphene membrane composite active alumina adsorbent, it comprises the steps:

[0027] 1) Substrate pretreatment: use activated alumina as the substrate, add it to 5wt% polyvinyl alcohol, and react at 30°C for 2 hours under continuous stirring, so that the surface of activated alumina is rich in hydroxyl groups, and place it in an oven After drying at 50°C, the pretreated matrix was obtained, ready for use:

[0028] 2) Preparation of graphene membrane composite activated alumina: immerse the pretreated substrate in an ethanol solution containing 1% 3-aminopropyltrimethoxysilane coupling agent at a volume concentration of 50°C under continuous React for 10 hours under stirring, take out the substrate, dry it, then add it to an organic solution containing 5wt% graphene, and react at 100°C for 10 hours to obtain a graphene membrane composite activated alumina adsorbent.

[0029] The graphene film composite activated alumina adsorbent sample was a...

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Abstract

The invention discloses a preparation method and an application of a graphene film composite activated aluminum oxide adsorbent adsorbing heavy metal ions and organic matter from waste water. The preparation method comprises the following steps: 1) taking activated aluminum oxide as a substrate, adding activated aluminum oxide into a polyvinyl alcohol organic solution to allow the surface of activated aluminum oxide to be rich in hydroxyl, putting in an oven at 20-50 DEG C for drying, obtaining the pretreated substrate for later use; 2) immersing the pretreated substrate in an alcohol solution containing a silane coupling agent with a volume concentration of 0.1-10%, taking out the substrate for drying, adding the substrate into an organic solution containing 0.1%-10 wt% of graphene, performing reaction for 1-10h at 50-100 DEG C, and obtaining the graphene film composite activated aluminum oxide adsorbent. Activated aluminum oxide is combined with the graphene; uncontrollability of a nanomaterial during subsequent treatment is avoided; a nano technology is creatively applied to the treatment of the heavy metal waste water, and the organic waste water that is high in toxicity, low in concentration and difficult to degrade; and adsorption rates are all above 97%.

Description

technical field [0001] The invention relates to a preparation method and application of a graphene membrane composite activated alumina adsorbent for adsorbing heavy metal ions in wastewater, and belongs to the field of water treatment in environmental protection. Background technique [0002] Metal ions have high toxicity, wide distribution, low content, and are not easy to degrade. They disperse in the environment for a long time, and finally are absorbed by plants through bioaccumulation, and enter the human body through the food chain, which has a serious impact on human survival and health. Therefore, the deep treatment of heavy metal ions in complex samples is very meaningful. Adsorption is a commonly used treatment method at present. Compared with other methods, it has low cost, easy operation, and is not easy to cause secondary pollution. The performance of the adsorbent determines the effect of advanced treatment, and its selection is the key factor. Carbon-based a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30C02F1/28
CPCB01J20/0248B01J20/20C02F1/281C02F2101/20C02F2101/30
Inventor 张一梅
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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