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New method for regenerating and eluting heavy petroleum polluted soil cleaning solution

A technology of oil pollution and cleaning fluid, applied in the restoration of polluted soil, oil industry, separation methods, etc., can solve problems such as lack

Active Publication Date: 2017-02-01
NANKAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But so far, there is still a lack of targeted research on related technologies

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Example 1: Accurately weigh 0.5 g of TX-100 modified diatomite (sodium hydroxide pretreatment, TX-100 loading capacity is 3%) adsorbent, add it to the Erlenmeyer flask, and then add 100 mL of the above cleaning solution , heated in a water bath at 25 °C, blown off with air at a flow rate of 60 mL / min, and regenerated for 30 minutes under magnetic stirring. The regenerated cleaning solution was used again to clean the contaminated soil with an oil content of 23%, and the removal rate of total petroleum hydrocarbons in the soil was 79.3%.

Embodiment 2

[0021] Example 2: Accurately weigh 0.5 g of TX-100 modified diatomite (sulfuric acid pretreatment, TX-100 loading capacity is 3%), add it into a conical flask, then add 150 mL of the above cleaning solution, and set the temperature at 25°C Heat in a water bath, blow off with air at a flow rate of 60 mL / min, and regenerate for 30 minutes under magnetic stirring. The regenerated cleaning solution was used again to clean the contaminated soil with an oil content of 23%, and the removal rate of total petroleum hydrocarbons in the soil was 62.0%.

Embodiment 3

[0022] Example 3: Accurately weigh 0.5 g of TX-100 modified diatomaceous earth (sodium hydroxide pretreatment, TX-100 loading capacity is 1%), add to the Erlenmeyer flask, then add 100 mL of the above cleaning solution, and Heat in a water bath at 25°C, blow off with air at a flow rate of 60 mL / min, and regenerate for 30 minutes under magnetic stirring. The regenerated cleaning solution was used again to clean the contaminated soil with an oil content of 23%, and the removal rate of total petroleum hydrocarbons in the soil was 67.1%.

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PUM

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Abstract

The invention provides a new method for regenerating and eluting a heavy petroleum polluted soil cleaning solution. Petroleum hydrocarbons in the cleaning solution are selectively adsorbed to regenerate the cleaning solution, and the regenerated cleaning solution reserves anionic surfactants, nonionic surfactants, assistants and other active components, and recovers the high-efficient heavy petroleum polluted soil cleaning performance. The invention also provides a preparation method of a surfactant / diatomite adsorbent, and technological parameters for regenerating the heavy petroleum polluted soil cleaning solution. The technological parameters comprise the treatment temperature, the time, the solid-to-liquid ratio and the gas-to-water volume ratio.

Description

technical field [0001] The invention relates to a preparation method of surfactant-modified diatomite and a new method for regenerating and eluting cleaning liquid for heavily oil-contaminated soil. Background technique [0002] my country is a big oil-producing country, and there are many oil and gas fields and reservoirs for exploration and development, which are widely distributed. During the exploration, extraction, transportation and storage of oil, the soil around the oil field is often heavily polluted by oil. Severe oil pollution will destroy the physical and chemical properties of soil, threaten the cleanliness of groundwater sources, and cause harm to crops. The highly toxic aromatic hydrocarbons in petroleum can accumulate in crops and pass along the food chain, eventually threatening human health. Oil-polluted soil not only brings serious environmental problems, but also wastes a lot of precious resources. The development of remediation technology for heavily ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/02B01J20/30B01J20/22B01J20/34
CPCB01J20/14B01J20/22B01J20/34B01J20/345B01J2220/4806B01J2220/4812B09C1/02
Inventor 马小东索学越肖剑于波孙文杰兰胜
Owner NANKAI UNIV