Stabilizing agent for repairing heavy metal pollution and preparation method thereof

A heavy metal stabilizer, stabilizer technology, applied in the field of heavy metal pollution control, can solve the problems of less dosage, increased pollutant capacity, secondary pollution, etc., achieves a wide range of applications, reduces the impact on the environment, and does not have secondary pollution. The effect of pollution

Inactive Publication Date: 2016-11-09
UNIVERSTAR SCI & TECH SHENZHEN
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  • Abstract
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Problems solved by technology

[0004] The purpose of the present invention is to provide a preparation method of a stabilizer for repairing heavy metal pollution with less dosage and good stabilization effect, and no or less compatibilization of pollutants after stabilization, aiming to solve the problem of conventional stabilizers that are easy to cause The problem of secondary pollution and pollutant increase

Method used

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  • Stabilizing agent for repairing heavy metal pollution and preparation method thereof
  • Stabilizing agent for repairing heavy metal pollution and preparation method thereof

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preparation example Construction

[0016] In view of this, an embodiment of the present invention provides a method for preparing a stabilizer for repairing heavy metal pollution, comprising the following steps:

[0017] S01. Corn starch is provided, the corn starch is added to an alkaline solution to form a corn starch paste, the corn starch paste is subjected to the first heat treatment, and the corn starch paste containing epoxy is added dropwise during the heating process. The alkaline solution of chloropropane is subjected to the first reaction at 20-40°C, and the cross-linked starch is obtained after the first purification treatment, wherein the water content of the corn starch is ≤15%, and the alkaline solution is The pH of the mixed solution formed by sodium hydroxide and sodium chloride is 9.0-11.0, and the temperature of the first heat treatment is 20-40°C;

[0018] S02. After soaking the cross-linked starch with water, adjust the pH to 9.0-12.0 with an alkaline compound, perform a second heat treatme...

Embodiment 1

[0032] A preparation method for a stabilizer for repairing heavy metal pollution, comprising the following steps:

[0033] S11. take by weighing 100g absolute dry cornstarch, join in 150ml alkaline solution under stirring (alkaline solution is to be prepared by 500ml water dissolving prescribed sodium hydroxide 1.32g and 15g sodium chloride); Then place in 55 In a constant temperature water bath at ℃, keep stirring, add 50ml of alkaline solution (containing 0.4ml of epichlorohydrin required amount) dropwise within 3 to 5min, and keep stirring and reacting at 25℃ for 4 hours; after the reaction is completed, use 30mol / L sulfuric acid solution to adjust the pH value of the solution to 6.0-7.0, let it stand for a period of time, filter, wash, filter with suction, and dry at 55°C to obtain the sample.

[0034] S12. Put the cross-linked starch prepared above into a three-necked flask, add an appropriate amount of distilled water to moisten and submerge, and control the pH of the wh...

Embodiment 2

[0036] Take 100ml of 50ppm Cr 3+ 、Cu 2+ , Pb 2+ 、Cd 2+ Four kinds of standard solutions of different pH values ​​are placed in 250ml Erlenmeyer flasks, respectively add the heavy metal polymer stabilizer prepared in the above-mentioned embodiment 1 of equal amount in every kind of standard solution, fully vibrate for a period of time, then let stand for a certain period of time. Filter after time. The concentration of residual metals in the clear night was determined by spectrophotometry and atomic absorption to determine the amount of adsorption. Calculated as follows:

[0037] Adsorption capacity Q=V×(C 0 -C) / W

[0038] In the above formula: Q=adsorption capacity; V=metal ion solution volume (L); C 0 =concentration of heavy metal ions in solution before adsorption (mg / L); C=concentration of heavy metal ions in solution after adsorption (mg / L); W=dry weight of medicament (g).

[0039] The stabilizer adsorption capacity curve figure that the embodiment of the present i...

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Abstract

The invention provides a preparation method of a stabilizing agent for repairing heavy metal pollution. The method comprises the steps of: providing corn starch, and adding the corn starch into an alkaline solution to form a corn starch paste, conducting first heating treatment on the corn starch paste, at the same time adding the alkaline solution containing epichlorohydrin into the corn starch paste dropwise, carrying out first reaction at 20-40DEG C, and performing first purification treatment to obtain crosslinked starch; infiltrating the crosslinked starch with water, then employing an alkaline compound to adjust the PH to 9.0-12.0, carrying out second heating treatment, adding a cationic etherifying agent dropwise under a constant temperature condition to carry out etherification reaction, and performing second purification treatment so as to obtain a heavy metal stabilizing agent.

Description

technical field [0001] The invention belongs to the technical field of heavy metal pollution treatment, in particular to a stabilizer for repairing heavy metal pollution and a preparation method thereof. Background technique [0002] As early as the early 1950s, the environmental pollution of heavy metals has attracted widespread attention from all over the world. Heavy metals usually have acute or chronic toxicity, and sometimes poison the human body in more complex ways, such as carcinogenic or indirectly cause certain diseases. Specifically, aquatic organisms in freshwater or oceans are very sensitive to heavy metals in water bodies, and even very low concentrations of heavy metals will pose a threat to them; heavy metals in soil or irrigation water will have adverse effects on plant growth, and will be in plants. Heavy metals in the environment, especially the complexity of their chemical behavior and ecological effects, have been a persistent research topic in the inte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B31/00C08B31/12
CPCC08B31/003C08B31/125
Inventor 顾燕张芸芸谢逸俊
Owner UNIVERSTAR SCI & TECH SHENZHEN
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