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Zr/chitosan composite adsorbent for adsorbing Pb<2+> in water body and preparation method thereof

A composite adsorption and chitosan technology, applied in the fields of adsorption water/sewage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc. The effect of chemical promotion and simple preparation process

Inactive Publication Date: 2017-02-08
NANCHANG HANGKONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method needs to add lye to the water, which is likely to cause secondary pollution of water quality.

Method used

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  • Zr/chitosan composite adsorbent for adsorbing Pb&lt;2+&gt; in water body and preparation method thereof

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preparation example Construction

[0024] The first aspect of the present invention provides a method for adsorbing Pb in water 2+ The preparation method of Zr / chitosan composite adsorbent, comprises the following steps:

[0025] (1) Preparation of chitosan colloid: dissolving chitosan in acetic acid solution, stirring and sonicating to prepare chitosan colloid;

[0026] (2) Preparation of zirconium oxychloride solution: dissolving zirconium oxychloride octahydrate in deionized water to prepare zirconium oxychloride solution;

[0027] (3) Mix the chitosan colloid described in step (1) with the zirconium oxychloride solution described in step (2), stir and sonicate to obtain a uniformly dispersed mixed solution;

[0028] (4) Cross-linking reaction: adding aldehyde to the mixed solution described in step (3), stirring, drying and grinding to obtain the Zr / chitosan composite adsorbent.

[0029] In the step (1) of the embodiment of the present invention, the stirring time for preparing the chitosan colloid is 2-4...

Embodiment 1

[0048]Weigh 1.0 g of chitosan, dissolve it in 36 mL of 2% acetic acid solution, stir at room temperature for 3 h, and then sonicate for 30 min to obtain chitosan colloid; weigh 0.8 g of zirconium oxychloride octahydrate and disperse it in 10 mL of deionized water , stirred at room temperature for 3 hours, and ultrasonicated for 30 minutes to obtain a zirconium oxychloride solution; pour the zirconium oxychloride solution into the chitosan colloid, stirred at room temperature for 24 hours, and then ultrasonicated for 1 hour to make it fully mixed to obtain a uniformly dispersed mixed solution; 4.6 mL of glutaraldehyde solution with a volume ratio of 1% was added dropwise to the mixed solution of zirconium oxychloride and chitosan colloid, stirred for 1 h to cause a cross-linking reaction, and then dried in an oven at 55 °C for 36 h to obtain dry The Zr / chitosan composite material is ground, and the Zr / chitosan composite material is ground to obtain a powdery Zr / chitosan composit...

Embodiment 2

[0051] Weigh 1.0g of chitosan, dissolve it in 36mL of 2% acetic acid solution, stir at room temperature for 3h, and then sonicate for 30min to obtain chitosan colloid; weigh 1.6g of zirconium oxychloride octahydrate and disperse it in 10mL of deionized water, Stir at room temperature for 3 hours, and sonicate for 30 minutes to obtain a zirconium oxychloride solution; pour the zirconium oxychloride solution into chitosan colloid, stir at room temperature for 24 hours, and then sonicate for 1 hour to make it fully mixed to obtain a uniformly dispersed mixed solution; 4.6 mL of glutaraldehyde solution with a ratio of 1% was added dropwise to the mixed solution of zirconium oxychloride and chitosan colloid, stirred for 1 h to cause a cross-linking reaction, and then dried in an oven at 55 °C for 36 h to obtain dry Zr / chitosan composite material, grinding the above Zr / chitosan composite material to obtain powdered Zr / chitosan composite adsorbent.

[0052] Use Pb with an initial con...

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Abstract

The invention discloses a preparation method of a Zr / chitosan composite adsorbent for adsorbing Pb<2+> in a water body. The method comprises the following steps: (1) dissolving chitosan in an acetic acid solution, stirring, and carrying out ultrasonic treatment to obtain a chitosan colloid; (2) dissolving zirconium oxychloride octahydrate in deionized water to prepare a zirconium oxychloride solution; (3) mixing the chitosan colloid with the zirconium oxychloride solution, stirring, and carrying out ultrasonic treatment to obtain a uniformly dispersed mixed solution; and (4) finally, adding aldehydes into the mixed solution, stirring, drying and grinding to obtain the Zr / chitosan composite adsorbent. The preparation method disclosed by the invention has the advantages of wide raw material sources, low cost and simple preparation technique, and can be easily industrialized and popularized. The composite adsorbent has favorable adsorption effects on Pb<2+> in the water body.

Description

technical field [0001] The invention relates to the technical field of adsorption materials, in particular to a method for adsorbing Pb in water bodies 2+ Zr / chitosan composite adsorbent and preparation method thereof. Background technique [0002] Lead is an important heavy metal pollutant. The lead ions in wastewater mainly come from the mining of lead mines, smelting and discharge from industrial production. When the lead content in wastewater reaches 0.1mg / L, it will inhibit the self-purification of the water body and give destructive effects on the natural environment. Excessive lead has toxic effects on many systems of the human body. The prominent symptoms of acute lead poisoning are abdominal cramps, hepatitis, high blood pressure, peripheral neuritis, toxic encephalitis and anemia, etc. The common symptoms of chronic poisoning are neurasthenia . Lead poisoning can also cause blood system diseases, urinary system diseases, etc., especially children are more sensit...

Claims

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Application Information

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IPC IPC(8): B01J20/30B01J20/26C02F1/28C02F101/20
CPCB01J20/267B01J20/0211C02F1/28C02F2101/20
Inventor 陈萍华蒋华麟田磊罗旭彪何文
Owner NANCHANG HANGKONG UNIVERSITY
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