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Medical stone sulfenyl repairing agent for treating soil mercury pollution and preparation method thereof

A technology of medical stone and repairing agent, applied in the field of soil mercury pollution repairing agent, can solve problems such as damage to human health, and achieve the effects of eliminating impurities, significantly repairing effect, and reducing bioavailability

Inactive Publication Date: 2019-04-16
GUIZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Long-term consumption of rice with high mercury content will seriously damage human health

Method used

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  • Medical stone sulfenyl repairing agent for treating soil mercury pollution and preparation method thereof
  • Medical stone sulfenyl repairing agent for treating soil mercury pollution and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Example 1. A medical stone mercapto restoration agent for controlling soil mercury pollution. The medical stone mercapto restoration agent is made from the following raw materials in weight: 10 kg of medical stone and 11 kg of mercapto complex.

[0034] The preparation method of this medical stone mercapto restoration agent comprises the following steps:

[0035] a. According to the volume ratio of mercapto complex, ethanol and water as 1:8:0.5, mix mercapto complex, absolute ethanol and water evenly to obtain product A.

[0036] b. Mix 10kg of medical stone and 100kg of sulfuric acid solution with a concentration of 1mol / L, seal and stir at 80°C for 7 hours, wash with water to pH 6.5, dry at 90°C, and pass through a 100-mesh sieve after grinding. Get B product.

[0037] c. Add product B to product A, stir thoroughly at room temperature, then wash with absolute ethanol twice to obtain product C;

[0038] d. After drying and grinding product C at a temperature of 70°C...

Embodiment 2

[0039] Example 2. A medical stone mercapto restoration agent for controlling soil mercury pollution. The medical stone mercapto restoration agent is made from the following raw materials, 11kg of medical stone and 12kg of mercapto complex.

[0040] The preparation method of this medical stone mercapto restoration agent comprises the following steps:

[0041] a. According to the volume ratio of mercapto complex, ethanol and water as 1:9:0.8, mix mercapto complex, absolute ethanol and water evenly to obtain product A.

[0042] b. Mix 11kg of medical stone and 110kg of sulfuric acid solution with a concentration of 2mol / L, seal and stir at 75°C for 6h, wash with water to pH 6.8, dry at 100°C, and pass through a 150-mesh sieve after grinding. Get B product.

[0043] c. Add product B to product A, stir thoroughly at room temperature, then wash with absolute ethanol for 3 times to obtain product C;

[0044] d. After drying and grinding product C at a temperature of 75°C, the medi...

Embodiment 3

[0045] Example 3. A medical stone mercapto restoration agent for controlling soil mercury pollution. The medical stone mercapto restoration agent is made from the following raw materials, 12kg of medical stone and 14kg of mercapto complex.

[0046] The preparation method of this medical stone mercapto restoration agent comprises the following steps:

[0047] a. According to the volume ratio of mercapto complex, ethanol and water as 1:10:1, mix mercapto complex, absolute ethanol and water evenly to obtain product A.

[0048] b. Mix 12kg of medical stone and 120kg of sulfuric acid solution with a concentration of 3mol / L, seal and stir at 70°C for 5h, wash with water to pH 7, dry at 110°C, and pass through a 200-mesh sieve after grinding. Get B product.

[0049] c. Add product B to product A, stir well at room temperature, then wash with absolute ethanol for 4 times to obtain product C;

[0050] d. After drying and grinding product C at a temperature of 80°C, the medical stone...

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Abstract

The invention discloses a medical stone sulfenyl repairing agent for treating soil mercury pollution and a preparation method thereof. The medical stone sulfenyl repairing agent is a composite repairing agent material obtained by modifying medical stone obtained after acid activation treatment through a sulfenyl-containing complex; the medical stone sulfenyl repairing agent is prepared from, by weight, 10-12 parts of medicine stone and 11-14 parts of a sulfenyl complex. The medical stone sulfenyl repairing agent has the advantages that the remarkable repairing effect on mercury polluted soil is achieved, the concentration of mercury in rice can be effectively lowered, the technological flow process is simple and reliable, the cost is low, use is safe, no secondary contamination is caused,the medical stone sulfenyl repairing agent is of a great actual and economic significance in mercury polluted soil repairing, and the repairing agent meets the national agricultural sustainable requirement.

Description

technical field [0001] The invention relates to a repairing agent for treating mercury pollution in soil, in particular to a medical stone sulfhydryl repairing agent for treating mercury pollution in soil and a preparation method thereof. Background technique [0002] Mercury is a toxic and harmful heavy metal. The U.S. Environmental Protection Agency (U.S.EPA) has listed mercury as one of the 13 heavy metal priority pollutants. In my country, the problem of mercury pollution is very serious, and the pollution prevention and control of mercury environmental safety has been clearly written into the national "13th Five-Year Plan" (Wang Qi et al., 2015). The long-term development of mercury resources in mercury mining areas, especially the traditional indigenous method of mercury smelting, has caused the mercury content in the mercury mining area and its surrounding ecosystems to seriously exceed the standard (Qiu Guangle et al., 2006). In some mercury-polluted areas, the main...

Claims

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Application Information

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IPC IPC(8): B01J20/22B01J20/30C09K17/40B09C1/08
CPCB01J20/16B01J20/22B01J2220/46B01J2220/4806B01J2220/4812B09C1/08C09K17/40
Inventor 何天容韩怡新许议元姚璁冉澍王祖波
Owner GUIZHOU UNIV
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