Oil-contaminated soil remediation agent and preparation thereof

A soil remediation agent and oil pollution technology, applied in the field of soil remediation, can solve the problems of environmental and beach damage, secondary pollution of the environment, etc., and achieve the effect of improving adsorption capacity and enriching pores.

Active Publication Date: 2020-04-17
ZHEJIANG OCEAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the existing oil soil remediation agents are chemical remediation agents, which will cause secondary pollution to the environment
[0004] Shells are one of the important economic shellfish in my country, but most of the by-products of mussel shells after processing are discarded, causing serious damage to the environment and tidal flats

Method used

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  • Oil-contaminated soil remediation agent and preparation thereof
  • Oil-contaminated soil remediation agent and preparation thereof
  • Oil-contaminated soil remediation agent and preparation thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] The preparation of embodiment 1 oily soil remediation agent

[0050] A preparation method of oily soil remediation agent, it may further comprise the steps:

[0051] 1) shell pretreatment

[0052] Soak 500g of blue mussel shells in 50L of 1% HCl solution for 24 hours to remove impurities, rinse with distilled water to remove residual hydrochloric acid on the surface, and then dry them in an oven at 60°C for 24 hours to obtain 400.8g of pretreated blue mussel shells;

[0053] 2) Surfactant freeze penetration

[0054] Soak the blue mussel shells pretreated in step 1) in 20L 0.5% fatty alcohol polyoxyethylene ether (AEO-9) surfactant for 48h, freeze at -20°C for 24h, and then place them in an oven at 80°C Medium drying for 24h;

[0055] 3) high temperature calcination

[0056] Grind the frozen shells in step 2) into powder with a particle size of 50 mesh for subsequent high-temperature calcination, place it in a muffle furnace, and raise the temperature to 300°C at a r...

Embodiment 2

[0058] The preparation of embodiment 2 oily soil remediation agent

[0059] A preparation method of oily soil remediation agent, it may further comprise the steps:

[0060] 1) shell pretreatment

[0061] Soak 100g of blue mussel shells in 10L of 1% HCl solution for 24 hours to remove impurities, rinse with distilled water to remove residual hydrochloric acid on the surface, and then dry them in an oven at 60°C for 24 hours to obtain 82g of pretreated blue mussel shells;

[0062] 2) Surfactant freeze penetration

[0063] Soak the blue mussel shells pretreated in step 1) in 4L 0.5% fatty alcohol polyoxyethylene ether (AEO-9) surfactant for 48h, freeze at -20°C for 24h, and then place them in an oven at 80°C Medium drying for 24h;

[0064] 3) high temperature calcination

[0065] Grind the frozen shells in step 2) into powder with a particle size of 50 mesh for subsequent high-temperature calcination, place it in a muffle furnace, and raise the temperature to 300°C at a rate ...

Embodiment 3

[0067] The preparation of embodiment 3 oily soil remediation agent

[0068] A preparation method of oily soil remediation agent, it may further comprise the steps:

[0069] 1) shell pretreatment

[0070] Soak 150g of blue mussel shells in 15L of 1% HCl solution for 24 hours to remove impurities, rinse with distilled water to remove residual hydrochloric acid on the surface, and then dry them in an oven at 60°C for 24 hours to obtain 124g of pretreated blue mussel shells;

[0071] 2) Surfactant freeze penetration

[0072] Soak the blue mussel shells pretreated in step 1) in 6L 0.5% fatty alcohol polyoxyethylene ether (AEO-9) surfactant for 48h, freeze at -20°C for 24h, and then place them in an oven at 80°C Medium drying for 24h;

[0073] 3) high temperature calcination

[0074] Grind the frozen shells in step 2) into powder with a particle size of 50 mesh for subsequent high-temperature calcination, place it in a muffle furnace, and raise the temperature to 300°C at a rate...

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Abstract

The invention relates to an oil-contaminated soil remediation agent and a preparation method thereof. The oil-contaminated remediation agent is grey black in appearance, has a pore size of 2-30 nm, apore volume of 1.118 * 10 <-3> to 1.391 * 10 <-3> cm<3>/g, and a specific surface area of 1.021 to 1.811 m<2>/g; according to the analysis results of an X-ray diffraction spectrometer, the oil-contaminated remediation agent has diffraction peaks at angles of 29.40 degrees, 35.96 degrees, 39.40 degrees, 43.16 degrees, 47.51 degrees and 48.50 degrees; and the results of infrared spectroscopy show that the oil-contaminated remediation agent has absorption peaks at 2680 cm<-1>, 2516 cm<-1>, 2335 cm<-1>, 1800 cm<-1>, 1445 cm<-1>, 876 cm<-1> and 708 cm<-1>. According to the method, shells are made into the oil-contaminated soil remediation agent through freezing permeation of a surfactant and high-temperature calcination, the oil-contaminated soil remediation agent can effectively adsorb and degrade oil contamination in soil, a removal rate reaches 49.38%, and a seed germination rate and total biomass after remediation reach 100% and 71.08 g/m <2>, respectively.

Description

technical field [0001] The invention relates to the technical field of soil remediation, in particular to an oily soil remediation agent and a preparation method thereof. [0002] technical background [0003] With the rapid development of the oil industry, oil spills have also increased, causing widespread soil pollution. Petroleum-contaminated soil usually contains benzene, toluene, ethylbenzene or petroleum hydrocarbons, which can enter the soil through different ways and cause serious harm to the environment. In recent years, a variety of oily soil remediation technologies have been developed, ranging from solvent extraction, adsorption, bioremediation to emerging electric remediation, ultrasonic and other technologies. Among these methods, adsorption is considered to be an economical and sustainable oily soil raw material. bit repair technology. At present, most of the existing oil soil remediation agents are chemical remediation agents, which will cause secondary poll...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/08
CPCB09C1/08B09C2101/00
Inventor 纪丽丽王振宋文东郭健蔡璐王亚宁
Owner ZHEJIANG OCEAN UNIV
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