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Hydrogel for sewage treatment as well as preparation method thereof

A sewage treatment and hydrogel technology, applied in the direction of adsorption water/sewage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problems of poor selectivity, low efficiency, low adsorption capacity, etc., and achieve high performance The effect of stability, simple preparation process, and high adsorption capacity

Inactive Publication Date: 2014-06-25
HENAN UNIV OF URBAN CONSTR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • Hydrogel for sewage treatment as well as preparation method thereof
  • Hydrogel for sewage treatment as well as preparation method thereof
  • Hydrogel for sewage treatment as well as preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Weigh 5g of polyvinyl alcohol, 3g of sodium alginate, 5g of sodium carboxymethyl cellulose and 95mL of deionized water into a three-neck flask, heat in a boiling water bath, stir mechanically for 2 hours to make it completely mixed, and put the mixture at 80°C Heated in a water bath, then added 5g of chitosan, and mechanically stirred for 6h. Cool the above mixed solution to room temperature, add 50 mL of a graphene oxide aqueous solution with a concentration of 1 g / L to the mixed solution and sonicate for 0.5 h, then mechanically stir for 0.5 h to uniformly disperse the graphene oxide. Drop the above-prepared mixed solution into 3% calcium chloride-boric acid saturated solution with a syringe to prepare composite hydrogel beads with a particle size of 2 to 3 mm, soak for 24 hours, and finally rinse with deionized water for 5 times and soak in water .

[0026] Weigh the above-mentioned hydrogel pellets with a dry weight of 0.025g and place them in 100mL Erlenmeyer flas...

Embodiment 2

[0031] Weigh 5g of polyvinyl alcohol, 3g of sodium alginate and 95mL of deionized water into a three-neck flask, heat in a boiling water bath, stir mechanically for 2 hours to make it completely mixed, heat the mixture in a water bath at 80°C, and then add 10g Chitosan, and mechanically stirred for 6h. Cool the above mixed solution to room temperature, add 50 mL of a graphene oxide aqueous solution with a concentration of 1 g / L to the mixed solution and sonicate for 0.5 h, then mechanically stir for 0.5 h to uniformly disperse the graphene oxide. Drop the above-prepared mixed solution into 3% calcium chloride-boric acid saturated solution with a syringe to prepare composite hydrogel beads with a particle size of 2 to 3 mm, soak for 24 hours, and finally rinse with deionized water for 5 times and soak in water .

[0032] Weigh the above-mentioned hydrogel pellets with a dry weight of 0.025g and place them in 100mL Erlenmeyer flasks, and then add 25mL of them in sequence with c...

Embodiment 3

[0034] Weigh 5g of polyvinyl alcohol, 3g of sodium alginate, 0.1g of sodium sulfite, 5g of sodium carboxymethyl cellulose and 95mL of deionized water into a three-necked flask, heat in a boiling water bath, stir mechanically for 2 hours to make it completely mixed, and mix The solution was heated in a water bath at 80°C, then 5g of chitosan was added, and mechanically stirred for 6h. Cool the above mixed solution to room temperature, add 50 mL of a graphene oxide aqueous solution with a concentration of 1 g / L to the mixed solution and sonicate for 0.5 h, then mechanically stir for 0.5 h to uniformly disperse the graphene oxide. Drop the above-prepared mixed solution into 3% calcium chloride-boric acid saturated solution with a syringe to prepare composite hydrogel beads with a particle size of 2 to 3 mm, soak for 24 hours, and finally rinse with deionized water for 5 times and soak in water .

[0035] Weigh the above-mentioned hydrogel pellets with a dry weight of 0.025g and pl...

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Abstract

The invention relates to hydrogel for sewage treatment as well as a preparation method thereof. The hydrogel comprises 5-90 parts of polyving akohol, 5-90 parts of chitosan, 0-20 parts of sodium carboxymethylcellulose, 0.05-0.3 part of graphene oxide and 3-5 parts of sodium alginate. The hydrogel provided by the invention can adsorb heavy metal ions in water efficiently, and has the characteristics of high adsorption capacity, high selectivity, cyclic regeneration and recycling, biodegradation and the like.

Description

technical field [0001] The invention relates to a hydrogel used for sewage treatment and a preparation method thereof. The hydrogel can efficiently absorb heavy metal ions in water. Background technique [0002] With the rapid development of industry, environmental problems caused by human activities such as mining, exhaust gas discharge, wastewater irrigation, and use of heavy metal products have become more and more serious. Environmental pollution incidents of heavy metals such as chromium, mercury, lead, arsenic, and chromium continue to occur, especially Water pollution by heavy metals has become a serious social problem. Heavy metals can cause harm to the water environment and the entire ecosystem through accumulation in water bodies, and can accumulate in the human body through contact or food, inducing various diseases and endangering human health. Therefore, how to quickly and efficiently remove heavy metal ions in water has become an urgent problem in the field of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/28B01J20/30C02F1/28C02F101/20
Inventor 梁峰朱慧杰王红强刘雪平宋丰明张岩郭一飞
Owner HENAN UNIV OF URBAN CONSTR
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