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Graphene oxide composite material for removing heavy metal in underground water and preparation method thereof

A composite material and graphene technology, applied in chemical instruments and methods, contaminated groundwater/leachate treatment, water pollutants, etc., can solve the problems of high cost of heavy metals in groundwater, secondary pollution of groundwater, and non-reusable use , to achieve the effects of high heavy metal removal efficiency, easy operation, low cost of use and low energy consumption

Inactive Publication Date: 2017-07-14
INST OF HYDROGEOLOGY & ENVIRONMENTAL GEOLOGY CHINESE ACAD OF GEOLOGICAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are many problems in using it to remove heavy metals from groundwater: the material cannot be reused, and the cost of removing heavy metals from groundwater is high; Migration, thereby causing secondary pollution to the surrounding groundwater

Method used

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  • Graphene oxide composite material for removing heavy metal in underground water and preparation method thereof
  • Graphene oxide composite material for removing heavy metal in underground water and preparation method thereof
  • Graphene oxide composite material for removing heavy metal in underground water and preparation method thereof

Examples

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Effect test

Embodiment 1

[0026] Weigh 100g of analytically pure kaolin, add it to a beaker with 1L of pure water, place the beaker under a cell disruptor for ultrasonic dispersion for 1h, and after standing for 1h, take the suspension to another beaker by siphon; The deposited kaolin repeats the aforementioned steps of adding pure water, ultrasonication, standing, and siphoning twice; the suspensions taken each time are left to stand for 12 hours and then separated into layers, and the suspensions are removed with siphons to obtain sediments, and the sediments are placed in Freeze-dry in a vacuum freeze-drying apparatus to obtain 30 g of kaolinite particles.

[0027] The prepared kaolinite particles were poured into a beaker and 200 mL of pure water was added, placed in a cell disruptor for ultrasonic dispersion for 1 h to form a suspension. The suspension was moved to a magnetic stirrer for stirring, and at the same time, 35 mL of 1mol / L ferric chloride hexahydrate solution was added to the aforement...

Embodiment 2

[0030] Weigh 100g of analytically pure kaolin, add it to a beaker with 1L of pure water, place the beaker under a cell disruptor for ultrasonic dispersion for 1h, and after standing for 1h, take the suspension to another beaker by siphon; The deposited kaolin repeats the aforementioned steps of adding pure water, ultrasonication, standing, and siphoning twice; the suspensions taken each time are left to stand for 12 hours and then separated into layers, and the suspensions are removed with siphons to obtain sediments, and the sediments are placed in Freeze-dry in a vacuum freeze-drying apparatus to obtain 30 g of kaolinite particles.

[0031] The prepared kaolinite particles were poured into a beaker and 200 mL of pure water was added, placed in a cell disruptor for ultrasonic dispersion for 1 h to form a suspension. Move the suspension to a magnetic stirrer for stirring, add 55mL of 1mol / L ferric chloride hexahydrate solution to it at the same time, add a small amount of sodi...

Embodiment 3

[0034] Weigh 100g of analytically pure kaolin, add it to a beaker with 1L of pure water, place the beaker under a cell disruptor for ultrasonic dispersion for 1 hour, and then siphon the suspension to another beaker after standing for 1 hour; The deposited kaolin repeats the aforementioned steps of adding pure water, ultrasonication, standing, and siphoning twice; the suspensions taken each time are allowed to stand for 12 hours and then separated into layers, and the sediment obtained from the suspension is removed by siphoning, and the sediment is placed in Freeze-dry in a vacuum freeze-drying apparatus to obtain 30 g of kaolinite particles.

[0035] The prepared kaolinite particles were poured into a beaker and 200 mL of pure water was added, placed in a cell disruptor for ultrasonic dispersion for 1 h to form a suspension. Move the suspension to a magnetic stirrer for stirring, add 12 mL of 1mol / L ferric chloride hexahydrate solution to it at the same time, add a small amoun...

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Abstract

The invention provides a graphene oxide composite material for removing heavy metal in underground water and a preparation method thereof. The preparation method comprises the following steps: mixing graphene oxide and modified kaolinite particles according to a mass ratio of 1:(100-500), and freeze-drying to form a micron-scale graphene oxide-modified kaolinite composite material, wherein the modified kaolinite particles are obtained by modifying a precipitate with iron trichloride, and the precipitate is obtained by dispersing and suspending kaolin in pure water for 1-12 hours. According to the invention, the graphene oxide is dispersed on the modified kaolinite particles to form the micron-scale composite material, so that after entering underground water, the composite material can remove lead and other heavy metal in the underground water, and causes no secondary pollution to the underground water. The graphene oxide-modified kaolinite composite material provided by the invention is wide in preparation raw material source, low in price and simple in preparation process; and the obtained material has the advantages of high safety, environment friendliness, convenient transportation and long shelf life, achieves a high efficiency of removing heavy metal in underground water, and has certain industrial application prospects.

Description

technical field [0001] The invention relates to a graphene oxide composite material, in particular to a graphene oxide composite material for removing groundwater heavy metals and a preparation method thereof. Background technique [0002] In recent years, the problem of heavy metal pollution in my country's water has become increasingly serious. How to efficiently treat wastewater containing a large amount of heavy metal ions has become the focus and difficulty of wastewater treatment today. At present, the methods used to remove heavy metals in water mainly include chemical fixation, ion exchange, adsorption, etc. Among them, adsorption method is a relatively simple, efficient and economical method for removing heavy metals in water. The key to improving the adsorption efficiency of the adsorption method is to develop more efficient, economical and non-secondary pollution adsorbents. At present, it has been reported that various materials such as activated carbon, carbon ...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/30C02F1/28C02F101/20C02F103/06
CPCB01J20/12B01J20/20C02F1/288C02F2101/20C02F2103/06
Inventor 黄冠星侯钦宣
Owner INST OF HYDROGEOLOGY & ENVIRONMENTAL GEOLOGY CHINESE ACAD OF GEOLOGICAL SCI
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