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Slow-release oxidizing agent for removing underground water polluted organic matters, and process thereof

A groundwater pollution and oxidizing agent technology, which is applied in the direction of contaminated groundwater/leachate treatment, water/sewage treatment, oxidized water/sewage treatment, etc., can solve the problem of reducing the utilization efficiency of oxidants, difficult to control the dispersion of oxidants, short half-life of oxidants, etc. problems, achieve the effect of reducing irrelevant consumption, improving repair effect, and improving oxidation efficiency

Pending Publication Date: 2020-11-06
江苏苏美达成套设备工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing in-situ chemical oxidation technology still has the following defects: 1. the half-life of the oxidant is short and the stability is poor; 2. the dispersion of the oxidant in the groundwater system is not easy to control; 3. other reducing substances in the groundwater aquifer also consume a certain amount of oxidant , thereby reducing the utilization efficiency of the oxidant

Method used

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  • Slow-release oxidizing agent for removing underground water polluted organic matters, and process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Example 1 Slow-release oxidizing agent for removing groundwater polluting organic matter

[0025] 1.1 Weigh 3 g of polybutylene succinate and dissolve it in 6 mL of deionized water to obtain a sustained-release matrix solution;

[0026] 1.2 Weigh 60g of polyacrylamide, 10g of sodium hydroxymethylcellulose, 1.2g of polyvinylpyrrolidone, 1.5g of cyclodextrin and 8g of stearic acid, heat and dissolve in 300mL of deionized water to obtain a slow-release solution;

[0027] 1.3 Weigh 12 g of montmorillonite, sieve it with a 160-mesh standard sieve after crushing, to obtain montmorillonite powder;

[0028] 1.4 Weigh 5g of sodium persulfate and 15g of potassium permanganate, and dissolve them in 80g of deionized water to obtain an oxidation solution;

[0029] 1.5 Add the montmorillonite powder obtained in step 1.3 to the oxidation solution obtained in step 1.4, and mix well to obtain an adsorption oxidation solution;

[0030] 1.6 Add the adsorption oxidation solution obtained...

Embodiment 3

[0040] Example 3 Application of Slow-release Oxidant for Removing Groundwater Polluted Organic Matter

[0041] 3.1 Dissolve the slow-release oxidant 1# obtained in Example 1 and the slow-release oxidant 2# obtained in Example 2 in water to test the dissolution of the oxidants sodium persulfate and potassium permanganate, respectively at 1h and 3h , 5h, 8h, 12h, 24h, 3 days, 10 days, 30 days sampling test, the results are as follows:

[0042]

[0043] Experimental area Oxidation percentage of TCE on day 1 Oxidation percentage of TCE on day 3 Oxidation percentage of TCE on day 10 Oxidation percentage of TCE on day 20 Experimental area A 75.9% 85.6% 92.6% 95.1% Experimental area B 76.3 81.3% 93.2% 97.2% Experimental area C 65.8% 66.3% 65.9% 67.1% Experimental area D 1.1% 0.63% 0.52% 0.83%

[0044] As can be seen from the above examples, the present invention has a relatively high slow-release effect, and can effectively ...

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Abstract

The invention relates to the technical field of groundwater remediation, particularly to a slow-release oxidizing agent for removing underground water polluted organic matters, and a process thereof.The slow-release oxidizing agent is prepared from 40 to 60 parts of polyacrylamide, 10 to 15 parts of carboxymethyl cellulose sodium, 0.5 to 1.5 parts of polyvinylpyrrolidone, 1.5 to 3.5 parts of cyclodextrin, 1 to 5 parts of polybutylene succinate, 10 to 15 parts of montmorillonite, 5 to 15 parts of stearic acid, 5 to 15 parts of sodium persulfate and 5 to 15 parts of potassium permanganate. According to the invention, by mixing oxidants sodium persulfate and potassium permanganate, an adsorbent, a slow release agent and a polymer skeleton, the stability and slow release property of the oxidant in the underground aquifer are improved, so that the oxidation efficiency is improved, and the underground water remediation effect is improved; and by mixing acrylamide, carboxymethyl cellulose sodium, polyvinylpyrrolidone, cyclodextrin and stearic acid as a slow-release agent, the slow-release effect of the oxidizing agent is guaranteed, and the compatibility of the slow-release agent and theoxidizing agent can be effectively guaranteed so as to reduce the irrelevant consumption of the oxidizing agent.

Description

technical field [0001] The invention relates to the technical field of groundwater remediation, in particular to a slow-release oxidizing agent for removing groundwater polluted organic matter and its technology. Background technique [0002] Groundwater is an important fresh water resource for human beings and an important water supply source for urban life and industrial and agricultural water. However, with the development of my country's industrialization process, many toxic and harmful pollutants enter the soil system through various channels, and then pollute the ground water. Groundwater remediation technologies include extraction treatment technology, bioaugmentation technology, in-situ chemical redox technology, electrothermal remediation and surfactant leaching, etc. [0003] The oxidants widely used in in-situ chemical oxidation technology are Feltol reagent, potassium permanganate, persulfate and ozone, which can efficiently treat and repair toxic pollutants in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/72C02F103/06
CPCC02F1/722C02F1/72C02F2103/06C02F2305/02C02F2305/14
Inventor 金永传王伟吴勇袁欣赵泫然
Owner 江苏苏美达成套设备工程有限公司
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