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Regenerative adsorption material for quickly adsorbing and removing organic micro-pollutants in water and method for preparing regenerative adsorption material

A technology for adsorbing materials and removing water, which is applied in the fields of water pollutants, water/sewage treatment, chemical instruments and methods, etc., to achieve the effects of high regeneration rate, fast adsorption speed and high removal rate

Active Publication Date: 2018-04-24
冠县安昌信息科技服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

PFOA also has roughly the same hazards as PFOS
However, there is currently no efficient renewable adsorbent material capable of rapid removal of these two organic micropollutants in drinking water.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Step 1. The preparation process of magnetic iron nanoparticles is as follows:

[0026] (1) 250mL single-port glass reaction bottle, filled with 100mL ultrapure water, and then put 1 magnetic rotor, the aqueous solution was filled with N 2 Aerate for 15 minutes to eliminate the dissolved oxygen in the aqueous solution. After the aeration is completed, immediately seal it with a parafilm.

[0027] (2) Weigh 6.1g of FeCl 3 ·6H 2 O, quickly transfer to the above-mentioned 100mL of aerated water, stir the FeCl with magnetic force 3 ·6H 2 O is completely dissolved, then weigh 3.0g of FeCl 2 4H 2 O, quickly transferred to the dissolved FeCl 3 ·6H 2 In the aqueous solution of O, continue to stir with magnetic force to completely dissolve the iron salt. The whole process needs to quickly seal the reaction bottle with a parafilm to minimize the entry of oxygen in the air into the aqueous solution.

[0028] (3) Open the oil bath, heat to 90°C, then place the above reactio...

Embodiment 2

[0045]A variety of materials are used to adsorb and remove persistent organic micropollutants PFOA and PFOS in water. The adsorption materials are divided into four types. The first is commercially available activated carbon, and the second is the magnetic iron nanometer prepared in step 1 of Example 1 Particles, the third type is the fluorinated graphene prepared in step 2 in embodiment 1, and the fourth type is the magnetic iron-modified fluorinated graphene prepared in step 3 in embodiment 1. The dosage of several materials is 15mg, and the concentrations of PFOA and PFOS in the test water are 5mg / L respectively. The results show that activated carbon can remove 8-12% of PFOA and PFOS within 2 hours, magnetic iron nanoparticles can remove 6-14% of PFOA and PFOS within 30 minutes, and fluorinated graphene can remove 30-40% of PFOA and PFOS within 30 minutes. PFOA and PFOS, while fluorinated graphene modified by magnetic iron nanoparticles can remove 60-80% of PFOA and PFOS w...

Embodiment 3

[0047] When the concentrations of PFOA and PFOS in 15mL water were respectively 200 μg / L, using 6 mg of the magnetic iron-modified fluorinated graphene prepared in Example 1, shaking at 220 rpm for 2 min, more than 95% of PFOA and PFOS could be removed; and, The 2mg / L natural organic matter in water has almost no negative effect on the removal of PFOA and PFOS by the adsorbent.

[0048] In addition, the adjustment of the mass ratio of fluorinated graphene to magnetic iron nanoparticles will affect the adsorption performance of the adsorption material. When the mass ratio of fluorinated graphene to magnetic iron nanoparticles is in the range of 0.6 to 3 (except for the ratio of 5:3), the fluorinated graphene modified by magnetic iron nanoparticles prepared in other ratios is oscillated at 220rpm More than 90% of PFOA and PFOS can be removed in 2 minutes, and more than 95% of PFOA and PFOS can be removed by shaking for 15 minutes.

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Abstract

The invention discloses a regenerative adsorption material for quickly adsorbing and removing organic micro-pollutants in water and a method for preparing the regenerative adsorption material. The method includes carrying out reaction on graphite fluoride which is used as a raw material to obtain graphene fluoride; carrying out reaction on FeCl2 4H2O and FeCl3 6H2O which are used as raw materialsto obtain magnetic iron nano-particles; carrying out mild modification on the basis of the graphene fluoride by the aid of the magnetic iron nano-particles to obtain the adsorption materials for adsorbing and removing the persistent organic micro-pollutants perfluorooctanoic acid (PFOA) and perfluorooctane sulfonate (PFOS) in real environmental water (lake water, river water and tap water). The regenerative adsorption material and the method have the advantages that the regenerative adsorption material is high in PFOA and PFOS adsorption speed and efficiency and easy to separate and recycle and can be reused, regeneration procedures are simple, and accordingly the regenerative adsorption material and the method have high application values.

Description

technical field [0001] The invention belongs to the field of environmental protection, and in particular relates to a regenerable adsorption material and a preparation method for rapidly adsorbing and removing organic micro-pollutants in water. Background technique [0002] With the development of modern industry, ensuring the safety of drinking water has become a difficult problem that needs to be overcome in environmental governance. Perfluorooctanesulfonic acid (PFOS) and perfluorooctanoic acid (PFOA) are two organic micropollutants existing in water bodies. PFOS is one of the most difficult to degrade organic pollutants known so far. It has high bioaccumulation and various toxicity. received people's attention. PFOA also has roughly similar hazards to PFOS. However, there is currently no efficient and renewable adsorbent material capable of rapid removal of these two organic micropollutants in drinking water. Contents of the invention [0003] The purpose of the pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/30B01J20/28B01J20/20C02F101/30C02F101/34C02F101/36
CPCB01J20/06B01J20/20B01J20/28009C02F1/281C02F2101/30C02F2101/34C02F2101/36
Inventor 李灵香玉王文婧史恩张晓霞秦洋
Owner 冠县安昌信息科技服务有限公司
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