Method for synthesizing Hg <2+> adsorption resin from carboxymethyl potato starch as raw material

A potato starch, carboxymethyl technology, applied in adsorption water/sewage treatment, chemical instruments and methods, water/sewage treatment, etc., can solve the problems of ion exchange method, such as large investment, large area, polluted cultivated land, etc. Simple process, easy operation and excellent performance

Inactive Publication Date: 2016-11-16
INNER MONGOLIA UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] The process of industrialization and urbanization is getting faster and faster. Industrial sewage, mining wastewater, and urban sewage are discharged directly to the environment without effective treatment, resulting in heavy metal pollution in water areas. At the same time, as these waters are used for irrigation, they also pollute a lot of water. Cultivated land. At present, the treatment methods for heavy metal ions nationwide mainly include neutralization precipitation, sulfide p

Method used

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  • Method for synthesizing Hg &lt;2+&gt; adsorption resin from carboxymethyl potato starch as raw material
  • Method for synthesizing Hg &lt;2+&gt; adsorption resin from carboxymethyl potato starch as raw material
  • Method for synthesizing Hg &lt;2+&gt; adsorption resin from carboxymethyl potato starch as raw material

Examples

Experimental program
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Embodiment 1

[0020] Example 1: Weigh 5g of carboxymethyl potato starch and 20ml of deionized water and mix evenly, add 6ml of 30% hydrogen peroxide and oxidize at 50°C for 1h, measure 50g (47.62ml) of acrylic acid, weigh 13.8g of sodium hydroxide and dissolve in In 20ml of deionized water, use the NaOH solution prepared above to neutralize acrylic acid under cooling in an ice-water bath, fully mix the neutralized acrylic acid and its sodium salt solution with the oxidized carboxymethyl potato starch solution, and add 4ml of 2.5mg / mL N, N'-methylenebisacrylamide solution, in N 2 Under protection, heat slowly to increase the temperature of the system gradually. After the polymerization reaction starts, stop stirring, continue to raise the temperature slowly, and keep warm at 80°C for 2 hours. The product is dried and pulverized to obtain the product. Hg 2+ The adsorption capacity is 4.85ug / g, and the removal rate is 98.8%.

Embodiment 2

[0021] Example 2: After L 9 (3 4 ) Orthogonal experiments obtained the synthetic adsorption of Hg 2+ The optimum condition of resin, specific embodiment is as follows:

[0022] Weigh 5g of carboxymethyl potato starch and 20ml of deionized water and mix evenly, add 6ml of hydrogen peroxide and oxidize at 50°C for 1h, measure 50g (47.62ml) of acrylic acid, weigh 13.8g of sodium hydroxide and dissolve in 20ml of deionized water, and use The sodium hydroxide solution prepared above neutralizes the acrylic acid under cooling in an ice-water bath, fully mixes the neutralized acrylic acid and its sodium salt solution with the oxidized carboxymethyl potato starch solution, and adds 4.8ml with a concentration of 2.5mg / mL of N,N'-methylenebisacrylamide solution, in N 2 Under protection, heat slowly to increase the temperature of the system gradually. After the polymerization reaction starts, stop stirring, continue to slowly raise the temperature, keep warm at 80°C for 2 hours, dry...

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Abstract

The invention discloses a method for synthesizing Hg <2+> adsorption resin from carboxymethyl potato starch as a raw material with a one-pot process through hydrogen peroxide oxidation. The method is mainly characterized by comprising steps as follows: the carboxymethyl potato starch is oxidized with hydrogen peroxide, and then the oxidized carboxymethyl potato starch, acrylic acid with a polymerization inhibitor removed and acrylic acid sodium salt are used for synthesizing the Hg <2+> adsorption resin with the one-pot process through water-bath heating under the protection of nitrogen without separation, washing and purification, the adsorption capacity of a product synthesized under the optimal condition to Hg <2+> with concentration being 1 ppb is 4.96 mu g/g, and the removal rate is as high as 99.7%. The method has the advantages that oxidation of the carboxymethyl potato starch with hydrogen peroxide does not require separation, purification and washing for traditional oxidization of the carboxymethyl potato starch, polymerization can be performed without addition of an initiator, and the product has higher adsorption capacity and quite high removal rate to Hg <2+>. Therefore, the technology for synthesizing the Hg <2+> adsorption resin is simple, the cost is low, and large-scale production is easier. The product has quite high adsorption capacity to Hg <2+>, thereby having quite good application prospect in treatment of Hg <2+>-containing sewage, remediation of Hg <2+>-containing soil and the like.

Description

technical field [0001] The invention discloses a novel adsorption Hg 2+ Resin and preparation method thereof, specifically relate to for containing Hg 2+ Sewage treatment, soil and river pollution control, etc., belong to the field of environmental functional materials. Background technique [0002] The process of industrialization and urbanization is getting faster and faster. Industrial sewage, mining wastewater, and urban sewage are discharged directly to the environment without effective treatment, resulting in heavy metal pollution in water areas. At the same time, as these waters are used for irrigation, they also pollute a lot of water. Cultivated land. At present, the treatment methods for heavy metal ions nationwide mainly include neutralization precipitation, sulfide precipitation, chemical reduction, electrochemical reduction, ion exchange, and biological treatment. However, the neutralization precipitation method is not effective for the removal of low-concentr...

Claims

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Application Information

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IPC IPC(8): C08F251/00C08F220/06C08F222/38C08B31/18B01J20/24B01J20/30C02F1/28C02F101/20
CPCC08F251/00B01J20/24B01J2220/4825C02F1/286C02F2101/20C08B31/185C08F220/06C08F222/385
Inventor 温国华尤美云刘广华吴海霞张建平李媛李茹柳青
Owner INNER MONGOLIA UNIVERSITY
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