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Adsorbent for removing boron from desalinated seawater as well as preparation method and application of adsorbent

An adsorbent and seawater technology, which is applied in the field of preparation of new adsorbents, can solve the problems of small molecular weight of NMDG and achieve the effects of convenient magnetic recycling, low cost, and convenient operation methods

Active Publication Date: 2021-11-12
WATER RESOURCES RES INST OF SHANDONG PROVINCE +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, NMDG has a small molecular weight and is easily soluble in water, so it is necessary to develop insoluble NMDG derivatives

Method used

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  • Adsorbent for removing boron from desalinated seawater as well as preparation method and application of adsorbent
  • Adsorbent for removing boron from desalinated seawater as well as preparation method and application of adsorbent

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Experimental program
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Effect test

preparation example Construction

[0023] As introduced in the background technology, the current adsorbent has a low removal rate and is not easy to be reused. The preparation process and the adsorption of boron ions in the aqueous solution may cause environmental pollution problems. Therefore, the present invention proposes a preparation method of a novel magnetic deboronation adsorption material, comprising:

[0024] Preparation of nano ferric oxide particles by co-precipitation method;

[0025] with SiO 2 Modification of nano ferric oxide particles;

[0026] Composite the modified nano iron ferric oxide particles with N-methylglucosamine to obtain a new type of magnetic adsorbent.

[0027] The application found that the boron removal rate increased with the increase of the amount of adsorbent; with the increase of the oscillation time, it first increased and then slowly tended to be stable; adsorption experiments were carried out at different pH values, and it was found that the adsorption rate under acid...

Embodiment 1

[0047] 1) Preparation experiment:

[0048] FeCl 3 ·6H 2 O, FeSO 4 ·7H 2 O is prepared into a solution containing 0.30mol / L iron salt, put it in a 250mL flask, heat it to 60°C with a water bath, stir and add 0.25mol / L NaOH solution drop by drop, until the pH rises to 9.0, Continue to stir for 30 minutes, after aging for a certain period of time, stop stirring and place a magnet under the three-necked flask for separation, wash with deionized water for 3 times, and dry in vacuum to obtain nano-Fe 3 o 4 . Then 0.5g nano-Fe 3 o 4 Put in a 250mL flask, add 0.6gNa 2 SiO 3 9H 2 O, then add 100 mL of deionized water. Stir and heat the water bath to 60°C, add 0.25mol / L nitric acid solution drop by drop, adjust the pH of the system to about 6.0, heat in the water bath for about 60 minutes, stop stirring, place a magnet under the flask to separate, and wash with deionized water 3 times, the final product was dried in a vacuum oven at 70°C for 12 hours to obtain SiO 2 Pack Fe...

Embodiment 2

[0052] 1) Preparation experiment:

[0053] FeCl 3 ·6H 2 O, FeSO 4 ·7H 2 O is prepared into a solution containing 0.30 mol / L iron salt, placed in a 250 mL flask, heated to 60 ° C with a water bath, stirred and added dropwise with 0.25 mol / L NaOH solution, until the pH rises to 9.2, Continue to stir for 30 minutes, after aging for a certain period of time, stop stirring and place a magnet under the three-necked flask for separation, wash with deionized water for 3 times, and dry in vacuum to obtain nano-Fe 3 o 4 . Then 0.5g nano-Fe 3 o 4 Put in a 250mL flask, add 0.6gNa 2 SiO 3 9H 2 O, then add 100 mL of deionized water. Stir and heat the water bath to 60°C, add 0.25mol / L nitric acid solution drop by drop, adjust the pH of the system to about 6, heat in the water bath for about 60 minutes, stop stirring, place a magnet under the flask to separate, and wash with deionized water 3 times, the final product was dried in a vacuum oven at 70°C for 12 hours to obtain SiO 2...

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Abstract

The invention belongs to the field of deboration of desalinated seawater, and relates to an adsorbent for removing boron from desalinated seawater as well as a preparation method and application of the adsorbent for removing boron from desalinated seawater. Nano ferroferric oxide particles are used as a matrix, and chemical modification is performed on the nano ferroferric oxide particles by using SiO2; and finally, N-methyl glucosamine with specific selectivity is introduced for boron, thereby conveniently preparing a novel magnetic boron-removing adsorption material. The prepared material is used for the boron removal process of desalinated seawater, and a product with excellent performance is provided for the application of removing boron ions in the desalinated seawater. Experimental results show that the prepared material is excellent in adsorption performance, and the static boron removal rate can reach 81.21-97.42%. The prepared material has ferromagnetism and boron removal specificity, is convenient to prepare and recycle, is suitable for the boron removal process of a low-boron-content system, and avoids the problem of environmental pollution in a traditional adsorbent preparation method. The adsorbent has a potential application prospect in seawater desalination and boron removal.

Description

technical field [0001] The invention belongs to the field of desalinated seawater deboronation, and in particular relates to a preparation method of a novel adsorbent used for desalinated seawater deboronation. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] Water resources account for about three-quarters of the earth's surface, but there is a serious shortage of drinking water in many countries in the world, mainly in developing countries and countries in the Middle East. The reason for this situation is that seawater and bittern water account for 97.5% of the total water resources on the earth, while fresh water only accounts for 2.5% of the total water on the earth, 8...

Claims

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Application Information

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IPC IPC(8): B01J20/22B01J20/28B01J20/30C02F1/28C02F101/10C02F103/08
CPCB01J20/06B01J20/103B01J20/22B01J20/28009C02F1/288C02F2101/108C02F2103/08Y02A20/131
Inventor 李福林孙婷婷陈华伟辛宏杰张其坤束庆香张晓旸
Owner WATER RESOURCES RES INST OF SHANDONG PROVINCE
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