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Preparation method for straw hydrogel composite material special for sewage treatment

A composite material, sewage treatment technology, applied in water/sewage treatment, adsorption water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of poor selectivity, low efficiency, low adsorption capacity, etc., and achieve stable performance , the effect of reducing cost and high adsorption capacity

Inactive Publication Date: 2016-06-01
CHENDU NEW KELI CHEM SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned adsorbents have disadvantages such as low adsorption capacity, poor selectivity, and low efficiency, and it is difficult to achieve advanced treatment of low-concentration heavy metal wastewater.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A method for preparing a straw hydrogel composite material for sewage treatment, which is characterized in that the hydrogel modified by straw is mainly prepared from the following raw materials in parts by weight:

[0031] 92 parts of polyvinyl alcohol, 0.5 part of bentonite, 1.5 parts of straw, 1.0 part of boric acid, wherein the degree of polymerization of polyvinyl alcohol is 2500, and the degree of alcoholysis is 99%.

[0032] The preparation method of a kind of hydrogel described in the present invention comprises the following steps:

[0033] (1) Heat and dissolve bentonite in deionized water, fully dissolve to obtain a suspension, and then ultrasonically disperse the suspension for 20 minutes to obtain a uniform bentonite dispersion;

[0034] (2) Ultrasonic the straw through a high-energy ultrasonic pulverizer, the ultrasonic time is 10min, and the ultrasonic power is 1000W. middle;

[0035] (3) Add polyvinyl alcohol to the bentonite dispersion, and then add i...

Embodiment 2

[0039] A method for preparing a straw hydrogel composite material for sewage treatment, which is characterized in that the hydrogel modified by straw is mainly prepared from the following raw materials in parts by weight:

[0040] 92 parts of polyvinyl alcohol, 1.5 parts of bentonite, 2 parts of straw, and 1.2 parts of boric acid, wherein the degree of polymerization of polyvinyl alcohol is 2500, and the degree of alcoholysis is 99%.

[0041] The preparation method of a kind of hydrogel of the present invention comprises the following steps:

[0042] (1) Heat and dissolve bentonite in deionized water, fully dissolve to obtain a suspension, and then ultrasonically disperse the suspension for 20 minutes to obtain a uniform bentonite dispersion;

[0043] (2) Ultrasonic the straw through a high-energy ultrasonic pulverizer, the ultrasonic time is 10min, and the ultrasonic power is 1000W. middle;

[0044] (3) Add polyvinyl alcohol to the bentonite dispersion, and then add it to the...

Embodiment 3

[0048] A method for preparing a straw hydrogel composite material for sewage treatment, which is characterized in that the hydrogel modified by straw is mainly prepared from the following raw materials in parts by weight:

[0049] 92 parts of polyvinyl alcohol, 2.5 parts of bentonite, 4 parts of straw, and 1.5 parts of boric acid, wherein the degree of polymerization of polyvinyl alcohol is 2500, and the degree of alcoholysis is 99%.

[0050] The preparation method of a kind of hydrogel of the present invention comprises the following steps:

[0051] (1) Heat and dissolve bentonite in deionized water, fully dissolve to obtain a suspension, and then ultrasonically disperse the suspension for 20 minutes to obtain a uniform bentonite dispersion;

[0052] (2) Ultrasonic the straw through a high-energy ultrasonic pulverizer, the ultrasonic time is 10min, and the ultrasonic power is 1000W. middle;

[0053] (3) Add polyvinyl alcohol to the bentonite dispersion, and then add it to t...

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Abstract

The invention discloses a preparation method for a straw hydrogel composite material special for sewage treatment of metal ion adsorption. A hydrogel comprises the following components in parts by weight: 86 to 92 parts of polyvinyl alcohol, 0.5 to 4.0 parts of bentonite, 1.5 to 8 parts of straw and 1.0 to 2.0 parts of boric acid. Straw cellulosic fibers are adopted and added in the form of micro / nano fibrils; a nano cellulose hydrogel is an intelligent hydrogel, is a porous material, is small in pore diameter, is endowed with high water retaining capacity by the porosity, is a multifunctional adsorption material, has the characteristics of rapidness, high efficiency, high adsorption capacity and high selectivity, and has a remarkable effect on adsorbing heavy metal ions; meanwhile, the preparation process is simple, the cost is low and the operability is high, so that the hydrogel has a good application prospect in the field of sewage treatment.

Description

technical field [0001] The invention relates to a method for preparing a hydrogel composite material for sewage treatment, belonging to the field of polymer materials. Background technique [0002] Traditional heavy metal treatment methods mainly include chemical treatment, ultrafiltration and adsorption. Although the chemical method has a fast purification speed and a simple process, it is prone to secondary pollution and difficult to recycle the wastewater; the ultrafiltration method is complicated in process, high in cost and poor in effect; the adsorption method is currently the most commonly used method in the treatment of heavy metal wastewater with low cost. , simple operation, no secondary pollution and other advantages. [0003] Currently commonly used adsorbents such as activated carbon, zeolite, ion resin, chelating resin, etc., have been well applied. However, the above-mentioned adsorbents have disadvantages such as low adsorption capacity, poor selectivity, a...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/30B01J20/28B01J13/00C02F1/28C02F1/62
CPCB01J20/261B01J13/0065B01J20/0248B01J20/12B01J20/24B01J20/28047B01J2220/46B01J2220/4806B01J2220/4812B01J2220/4825C02F1/281C02F1/285C02F1/286C02F1/288C02F2101/20
Inventor 陈庆曾军堂叶任海陈兵
Owner CHENDU NEW KELI CHEM SCI CO LTD
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