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Resin-based nano composite adsorbent for deeply removing micro fluorine in water as well as preparation method and application thereof

A nanocomposite and adsorbent technology, applied in chemical instruments and methods, adsorption of water/sewage treatment, water pollutants, etc., can solve the problems of fluorine removal effect and natural organic matter, and achieve small size and high load capacity , Improve the effect of adsorption area

Active Publication Date: 2017-07-14
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the disadvantage that when the existing resin-based nano-zirconia composite material is used to remove fluorine in natural water bodies, it is greatly affected by natural organic matter in the water body, thereby affecting the removal effect of fluorine, and provides a deep removal method. Resin-based nanocomposite adsorbent for trace amount of fluorine in water, preparation method and application thereof

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] With dried 10g tertiary aminated ultra-high cross-linked polystyrene resin (tertiary amino group content is 0.8mmol / g, organic framework pore volume is 1.0cm 3 / g, the specific surface area is 800m 2 / g) into 30gZrOCl 2 ·8H 2 O. 200 mL of a mixed solution of 10 g HCl and 60 g ethanol was evaporated to dryness with stirring. Then sequentially add 5% NaOH and 5% NaCl solution for transformation, wash with water, wash with alcohol, and then dry to obtain a resin-based nano-zirconia composite material (nano-composite adsorbent).

[0031] After acidification and digestion, the zirconium content in the composite material is measured to be 12wt% by inductively coupled plasma emission spectroscopy (ICP-AES). Observation by a transmission electron microscope shows that the particle size of the zirconium oxide nanoparticles in the composite material is 10-80nm. by N 2 -Adsorption-desorption test measures the pore volume of the nanocomposite to be 0.6cm 3 / g, the specific sur...

Embodiment 2

[0034] With dried 10g tertiary aminated ultra-high cross-linked polystyrene resin (tertiary amine content is 0.8mmol / g, organic framework pore volume is 1.0cm 3 / g, the specific surface area is 800m 2 / g) into 30g ZrOCl 2 ·8H 2 O. 200 mL of a mixed solution of 10 g HCl and 60 g ethanol was evaporated to dryness with stirring. Then sequentially add 5% NaOH and 5% NaCl to transform, wash with water, wash with alcohol, and then dry to obtain a resin-based nano-zirconia composite material.

[0035] After acidification and digestion, the content of zirconium in the composite material is measured to be 12wt% by inductively coupled plasma emission spectroscopy (ICP-AES). Observation by transmission electron microscopy shows that the particle size of the zirconia nanoparticles in the composite material is 10-80nm . by N 2 -Adsorption-desorption test measures the pore volume of the nanocomposite to be 0.6cm 3 / g, the specific surface area is 900m 2 / g, the pores below 2nm accoun...

Embodiment 3

[0038] With dried 10g tertiary aminated ultra-high cross-linked polystyrene resin (tertiary amine content is 0.2mmol / g, pore volume is 1.2cm 3 / g, the specific surface area is 1200m 2 / g) into 25g ZrOCl 2 ·8H 2 O. 200 mL of a mixed solution of 10 g HCl and 60 g ethanol was evaporated to dryness with stirring. Then sequentially add 3% NaOH and 3% NaCl to transform, wash with water, wash with alcohol, and then dry to obtain a resin-based nano-zirconia composite material.

[0039] After acidification and digestion, the content of zirconium in the composite material is measured to be 10wt% by inductively coupled plasma emission spectroscopy (ICP-AES). Observation by transmission electron microscopy shows that the particle size of the zirconia nanoparticles in the composite material is 10-80nm . by N 2 -Adsorption-desorption test measures the pore volume of the nanocomposite to be 0.9cm 3 / g, the specific surface area is 1500m 2 / g, the pores below 2nm accounted for 96% of t...

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Abstract

The invention discloses a resin-based nano composite adsorbent for deeply removing micro fluorine in water as well as a preparation method and application thereof and belongs to the technical field of water treatment. The resin-based nano composite adsorbent disclosed by the invention takes tertiary amination hypercrposslinked polystyrene-divinylbenzene as a framework, content of tertiary amino groups is 0.2-1.5mmol / g, zirconium oxide nanoparticles are loaded in an organic framework, load amount metered by zirconium element is 10-30wt%, and nano particle size is 10-80nm; and the ratio of pores with the diameter less than 2nm in the composite material accounts for more than or equal to 90% of the total pore volume. The nano composite material disclosed by the invention is rich in micropore structures, influence of a natural organic matter on fluorine removal by virtue of size exclusion effect can be reduced, and deep purification on the micro fluorine in the water can still be realized under the background of high organic matter content.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and more specifically relates to a resin-based nanocomposite adsorbent for deep removal of trace amounts of fluorine in water, a preparation method and application thereof. Background technique [0002] Fluorine is an essential element for the human body. An appropriate amount of fluorine plays an important role in teeth and bones; however, if the intake of fluorine is excessive, it will have many adverse effects on the human body, such as: causing dental fluorosis, skeletal fluorosis, destroying Normal calcium and phosphorus metabolism. At present, the abnormal fluoride content in natural water is a major worldwide problem. When the fluorine content in drinking water exceeds the standard, it will cause endemic fluorosis epidemics. Fluorosis is one of the most serious endemic diseases in my country. Both at home and abroad have made strict regulations on the fluoride content of drinking ...

Claims

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Application Information

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IPC IPC(8): B01J20/22B01J20/28B01J20/30C02F1/28C02F101/14
CPCB01J20/226C02F1/285B01J20/28064B01J20/28066B01J20/28071B01J20/28073B01J20/2808C02F2101/14
Inventor 潘丙才张璐蒋朝张孝林黎智贤郑琪林斌
Owner NANJING UNIV
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