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Method for repairing pyrene and nickel compound contaminated soil through sudangrass

A technology for compound pollution and polluted soil, applied in the field of soil remediation to achieve the effect of promoting growth, increasing biomass and improving bioavailability

Active Publication Date: 2019-09-06
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the technical problems existing in the remediation technology of pyrene and nickel compound polluted soil, a method for remediating pyrene and nickel compound polluted soil with sudan grass is provided, that is, using surfactant and chelating agent to strengthen sudan grass to remediate pyrene and nickel compound polluted soil, Improving the bioavailability of the pollutants pyrene and nickel and promoting the growth of sudangrass, thereby improving the efficiency of phytoremediation of contaminated soil

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment 1: a kind of method of sudan grass remediation pyrene polluted soil, concrete steps are as follows:

[0024] (1) tea saponin solution is mixed with nitrilotriacetic acid to obtain mixed solution A; wherein the concentration of tea saponin in mixed solution A is 5g / L, the mass ratio of tea saponin and pyrene-contaminated soil in step (2) It is 1:1000; the concentration of nitrilotriacetic acid is 1:1000 for the mass ratio of pyrene-contaminated soil in 5g / L and step (2);

[0025] (2) Sudan grass is planted in pyrene-contaminated soil for in-situ soil remediation; wherein the content of pyrene in the pyrene-contaminated soil is 52.00 mg / kg, and Sudan grass seeds are soaked in distilled water for 8 hours before sowing so as to germinate, and the soaked seeds are sown The depth is 4 cm and the sowing density is 70 seeds per kg of soil. Ensure that the soil moisture content is 17% to 19% before sudan grass sprouts, and maintain the soil moisture content at 16% to...

Embodiment 2

[0032] Embodiment 2: a kind of method of sudan grass remediation nickel-contaminated soil, concrete steps are as follows:

[0033] (1) tea saponin solution is mixed with nitrilotriacetic acid to obtain mixed solution A; wherein the concentration of tea saponin in mixed solution A is 5g / L, the mass ratio of tea saponin and nickel-contaminated soil in step (2) Be 1:1000; The mass ratio of nitrilotriacetic acid and nickel-contaminated soil in step (2) is 1:1000;

[0034] (2) Plant Sudan Grass in nickel-contaminated soil for in-situ soil remediation; wherein the content of nickel in the nickel-contaminated soil is 199.69 mg / kg, and Sudan grass seeds are soaked in distilled water for 8 hours before sowing to germinate, and the soaked seeds are sown The depth is 4 cm and the sowing density is 70 seeds per kg of soil. Ensure that the soil moisture content is 17% to 19% before sudan grass sprouts, and maintain the soil moisture content at 16% to 17% after germination. Plants should b...

Embodiment 3

[0041] Embodiment 3: a kind of method of sudan grass remediation pyrene and nickel composite polluted soil, concrete steps are as follows:

[0042] (1) tea saponin solution is mixed with nitrilotriacetic acid to obtain mixed solution A; wherein the concentration of tea saponin in mixed solution A is 5g / L, pyrene and nickel composite polluted soil in tea saponin and step (2) The mass ratio of is 1:1000; The concentration of the nitrilotriacetic acid in the mixed solution A is 5g / L, and the mass ratio of pyrene and nickel compound polluted soil in nitrilotriacetic acid and step (2) is 1:1000;

[0043] (2) Sudan grass was planted in pyrene and nickel compound polluted soil for in-situ soil remediation; wherein the content of pyrene in pyrene and nickel compound polluted soil was 52.00 mg / kg, the content of nickel was 199.69 mg / kg, and the Sudan grass seed Soak in distilled water for 8 hours before sowing so as to germinate. The seed sowing depth after soaking is 4 cm, and the sow...

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Abstract

The invention discloses a method for repairing pyrene and nickel compound contaminated soil through sudangrass, and belongs to the technical field of soil repairing. The method includes the steps of evenly mixing a tea saponin solution and nitrilotriacetic acid to obtain a mixed solution A, planting the sudangrass in the pyrene and nickel compound contaminated soil for in-situ soil repairing, adding the mixed solution A to the contaminated soil in batches after the sudangrass grow for three weeks, and removing the sudangrass from the soil when the sudangrass continues to grow for six weeds sothat the repairing of the contaminated soil can be completed. The repairing of the pyrene and nickel compound contaminated soil by the sudangrass is enhanced by a surfactant and a chelating agent, thebioavailability of pollutants (pyrene and nickel) is improved, the growth of the sudangrass is promoted, and therefore the plant repairing efficiency of the contaminated soil is improved.

Description

technical field [0001] The invention relates to a method for restoring pyrene-nickel compound polluted soil with sudan grass, belonging to the technical field of soil restoration. Background technique [0002] When organic matter and heavy metals exist in the soil at the same time, due to the differences in the properties and structures of the two, they are likely to interact, and the compound pollution formed by them is more harmful than single pollution. Therefore, the control of soil pyrene and nickel compound pollution is an urgent problem to be solved in our country. Phytoremediation technology has become a research hotspot in soil pollution control because of its low treatment cost, beneficial to the maintenance of soil ecosystem, and controllable secondary pollution. Sudan grass has a well-developed root system, and the plants grow tall and fast. It has been reported that it can still grow normally in an environment with high PAHs pollution concentration, and has a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/10
CPCB09C1/105B09C2101/00
Inventor 刘晓艳申思远张新颖孔德雯高铭晶陈欣彤顾泮雪沈佳怡
Owner SHANGHAI UNIV
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