Medicament for fixing and reducing benzene series and preparation method and application thereof

A technology of benzene series and medicaments, which is applied in the field of fixing and reducing benzene series medicaments and its preparation, which can solve the problems of incomplete repair and secondary pollution, and achieve the effect of increasing the difficulty of treatment and avoiding loss

Pending Publication Date: 2022-03-15
CHINA UNIV OF GEOSCIENCES (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the incomplete repair and the generation of secondary pollutants due to the migration of pollutants or the consumption of oxidants when repairing pollutants such as benzene series in the soil or groundwater of the LNAPL source area in the prior art. defects such as secondary pollution, thereby providing a medicament for fixing and reducing benzene series and its preparation method and application

Method used

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  • Medicament for fixing and reducing benzene series and preparation method and application thereof
  • Medicament for fixing and reducing benzene series and preparation method and application thereof
  • Medicament for fixing and reducing benzene series and preparation method and application thereof

Examples

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Embodiment 1

[0035] This embodiment provides a medicament comprising sodium bentonite and sodium persulfate.

[0036] The preparation method of the above-mentioned medicament comprises the following steps,

[0037] Weigh 2g of sodium-based bentonite into a 40mL brown bottle, add ultrapure water with a 10mL pipette to make the bentonite fully swell, shake well, and then add sodium persulfate stock solution with a 1mL pipette after stabilization, add ultrapure water, Set the volume to 40mL to obtain the medicament, the molar concentration of sodium persulfate in the medicament is 20mmol / L, and the mass is 0.2g.

[0038] Wherein, the preparation method of sodium persulfate stock solution comprises, takes by weighing 190.4832g sodium persulfate solid, is fixed to 1000mL with ultrapure water and volumetric flask, and after constant volume, liquid is transferred in the 1000mL sample bottle, standby, sodium persulfate reserve The concentration of sodium persulfate in the solution is 0.8mol / L.

Embodiment 2

[0040] This embodiment provides a medicament comprising sodium bentonite and potassium persulfate.

[0041] The preparation method of the above-mentioned medicament comprises the following steps,

[0042] Weigh 2g of sodium-based bentonite into a 40mL brown bottle, add ultrapure water with a 10mL pipette to fully expand the bentonite, shake well, and then add potassium persulfate stock solution with a 1mL pipette after stabilization, then add ultrapure water, Set the volume to 40mL to obtain the medicament, the molar concentration of potassium persulfate in the medicament is 20mmol / L, and the mass is 0.22g.

[0043] Wherein, the preparation method of potassium persulfate stock solution comprises, takes by weighing 190.4832g potassium persulfate solid, is settled to 1000mL with ultrapure water and volumetric flask, and liquid transfers in the 1000mL sample bottle after constant volume, standby, potassium persulfate reserve The concentration of potassium persulfate in the liqui...

Embodiment 3

[0046] This embodiment provides a medicament comprising sodium bentonite and sodium persulfate.

[0047] The preparation method of the above-mentioned medicament comprises the following steps,

[0048]Weigh 2g of sodium bentonite into a 40mL brown bottle, add ultrapure water with a 10mL pipette to make the bentonite fully swell, shake well, and then add sodium persulfate stock solution with a 0.5mL pipette, and add ultrapure water , and set the volume to 40mL to obtain the medicament, the molar concentration of sodium persulfate in the medicament is 10mmol / L, and the mass is about 0.1g.

[0049] Wherein, the preparation method of sodium persulfate stock solution comprises, takes by weighing 190.4832g sodium persulfate solid, is fixed to 1000mL with ultrapure water and volumetric flask, and after constant volume, liquid is transferred in the 1000mL sample bottle, standby, sodium persulfate reserve The concentration of sodium persulfate in the solution is 0.8mol / L.

[0050] Th...

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PUM

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Abstract

The invention belongs to the technical field of water treatment, and particularly relates to a medicament for fixing and reducing benzene series as well as a preparation method and application thereof. The agent comprises bentonite and persulfate ions, according to the method disclosed by the invention, the benzene series in the pollution source area can be effectively fixed and reduced without physically or chemically activating substances containing the persulfate ions through the matching effect of the bentonite and the persulfate ions. Furthermore, the bentonite fixing technology and the persulfate ion advanced oxidation method are combined, the pollutant is fixed in situ, meanwhile, the reduction effect is achieved, the agent can prevent migration and diffusion of the pollutant and can fix the pollutant in situ for reduction, reduction is thorough, and the treatment effect is good. And bentonite and peroxydisulfate ions do not generate other influences on a polluted site.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to a medicament for fixing and reducing benzene series and its preparation method and application. Background technique [0002] The leakage of organic pollutants into the groundwater will exist in the form of light non-aqueous phase liquid (LNAPL) in the aquifer to form a pollution source, and migrate horizontally and vertically with the water flow. If it is not treated, it will form a pollution plume. Larger range of soil and groundwater. Common pollutants are benzene, toluene, ethylbenzene, o-xylene, etc. [0003] Solidification / stabilization technology is a common engineering technology for remediation of contaminated media such as soil, sludge, and sediment, which can effectively reduce or prevent the exposure and migration of pollutants in the media. In the prior art, the method for remediating pollutants such as benzene series in the LNAPL source area is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/28C02F1/66C02F1/72C02F101/32
CPCC02F1/725C02F1/281C02F1/66C02F2101/32C02F2101/322
Inventor 刘菲侯若冰刘玉龙童林林杨梓涵
Owner CHINA UNIV OF GEOSCIENCES (BEIJING)
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