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Preparation method of fluorion adsorbent

An adsorbent and fluoride ion technology, which is applied in chemical instruments and methods, adsorption water/sewage treatment, silicate, etc., can solve the problems of low adsorption efficiency and high temperature of the adsorbent, and achieve low cost and high fluoride ion adsorption , The effect of simple process

Inactive Publication Date: 2018-10-30
SUZHOU YOUJUN ENVIRONMENTAL SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the adsorption efficiency of this adsorbent is too low, and the temperature required in the preparation process is relatively high.

Method used

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  • Preparation method of fluorion adsorbent

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Effect test

Embodiment 1

[0020] A preparation method of fluoride ion adsorbent, said preparation method comprising the following steps:

[0021] Step 1. Weigh 10 parts by mass of natural zeolite, then wash with deionized water until there is no suspended impurities, and bake at 100° C. for 10 min. The particle size of the natural zeolite is 1-1.5 mm.

[0022] Step 2. Put the baked natural zeolite into 120 parts by mass of 2wt.% Al 2 (SO 4 ) 3 Soak in the solution for 4 hours at a temperature of 70°C, then drop 5 parts by mass of 1mol / L NaOH solution into the soaking solution, stir for 10 minutes, then vacuum filter with a Buchner funnel, and roast the filtered modified zeolite at a temperature of 100°C 2h.

[0023] Step 3. Then add 1 mass part of kaolin, 2 mass parts of zirconium oxychloride and 0.5 mass part of bone char into the modified zeolite after roasting, and stir evenly.

[0024] Step 4. Add 60mL of 5wt.% acetic acid solution to the stirred mixture, add 12 parts by mass of 0.15mol / L ammon...

Embodiment 2

[0027] A preparation method of fluoride ion adsorbent, said preparation method comprising the following steps:

[0028] Step 1. Weigh 15 parts by mass of natural zeolite, then wash it with deionized water until there is no suspended impurities, and bake it at 120° C. for 20 minutes. The particle size of the natural zeolite is 1-1.5 mm.

[0029] Step 2. Put the baked natural zeolite into 150 parts by mass of 4wt.%Al 2 (SO 4 ) 3 Soak in the solution for 6 hours at 80°C, then add 8 parts by mass of 1mol / L NaOH solution dropwise to the soaking solution, stir for 20 minutes, then vacuum filter with a Buchner funnel, and roast the filtered modified zeolite at 120°C 4h.

[0030] Step 3. Then add 3 parts by mass of kaolin, 4 parts by mass of zirconium oxychloride and 1.2 parts by mass of bone char into the modified zeolite after roasting, and stir evenly.

[0031] Step 4. Add 80mL 5wt.% acetic acid solution to the stirred mixture, add 15 parts by mass of 0.15mol / L ammonium cerium ...

Embodiment 3

[0034] A preparation method of fluoride ion adsorbent, said preparation method comprising the following steps:

[0035] Step 1. Weigh 12 parts by mass of natural zeolite, then wash it with deionized water until there is no suspended impurities, and bake it at 110° C. for 15 minutes. The particle size of the natural zeolite is 1-1.5 mm.

[0036] Step 2. Put the baked natural zeolite into 130 parts by mass of 3wt.%Al 2 (SO 4 ) 3 Soak in the solution for 5 hours at a temperature of 75°C, then add 7 parts by mass of 1mol / L NaOH solution dropwise to the soaking liquid, stir for 15 minutes, and then vacuum-filter it with a Buchner funnel, and roast the filtered modified zeolite at a temperature of 110°C 3h.

[0037] Step 3. Then add 2 parts by mass of kaolin, 3 parts by mass of zirconium oxychloride and 1 part by mass of bone char into the modified zeolite after roasting, and stir evenly.

[0038] Step 4. Add 75mL 5wt.% acetic acid solution to the stirred mixture, add 13 parts b...

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Abstract

The invention provides a preparation method of a fluorion adsorbent, and belongs to the technical field of adsorbents. The preparation method comprises the following specific preparation processes: cleaning natural zeolite with deionized water until no suspended impurities are generated, and then drying; putting the dried natural zeolite in an aluminium sulfate solution for soaking, then adding aNaOH solution, stirring and then performing vacuum filtration, and calcining a solid after vacuum filtration; uniformly mixing the calcined modified zeolite, kaolin, zirconium oxychloride and bone char; adding an acetic acid solution in the mixture to perform acidification; then adding a cerous nitrate solution and a titanium sulfate solution; and regulating the pH value of the solution until thesolution is alkaline, then standing, filtering, washing a filtered-out material with deionized water until the filtered-out material is neutral, and drying to prepare the fluorion adsorbent. The preparation method is low in cost, environmental-friendly and harmless, natural zeolite is modified with Al2O3, natural zeolite is combined with kaolin, zirconium oxychloride and bone char that have relatively strong fluorine ion adsorption capacity, and the synergistic interaction effect of bone char and other substances are used, so that the prepared product is high in fluorine ion adsorbability andhigh in fluorine ion adsorption capacity.

Description

technical field [0001] The invention belongs to the technical field of adsorbents, and in particular relates to a preparation method of a fluoride ion adsorbent. Background technique [0002] In water, when the fluorine content is greater than 1.0mg / L, it is called excessive fluorine, also known as high fluorine water. High fluorine water seriously affects people's health, and there are currently 70 million people in China drinking high fluoride water. Due to poor natural water quality, 22.9778 million people suffer from fluorosis. Drinking high-fluoride water seriously endangers human health and safety. Therefore, it is particularly urgent and important to study materials for efficient and economical treatment of high-fluorine groundwater according to the groundwater quality and local socio-economic conditions. [0003] At present, there are many treatment methods for fluorine-containing wastewater at home and abroad, mainly including chemical precipitation method, adsorp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/16B01J20/30C02F1/28C02F101/14
CPCB01J20/0248B01J20/165C02F1/281C02F2101/14
Inventor 凌云凌天阳金可心夏戊君
Owner SUZHOU YOUJUN ENVIRONMENTAL SCI & TECH
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