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Method for restoring heavy metal in sewage irrigation soil through NTA and 3-indoleacelic acid-enhanced festuca arundinacea

A technology of indole acetic acid and tall fescue, applied in chemical instruments and methods, botanical equipment and methods, soil conditioning materials, etc., can solve problems such as no literature reports

Inactive Publication Date: 2014-06-18
TIANJIN NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no literature report on the technology of combining NTA and 3-indoleacetic acid with turf plants to remediate soil heavy metals in sewage irrigation areas.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] The method of NTA and 3-indoleacetic acid mixture fortifying tall fescue to enrich soil heavy metals in sewage irrigation area:

[0071] (1) Handling of materials:

[0072] The perennial tall fescue ( Festuca arundinacea L . ) is the experimental material;

[0073] Chelating agent selects nitrilotriacetic acid; 3-indoleacetic acid

[0074] The soil for the test was taken from the sewage irrigation area of ​​Xiqing District, Tianjin. After removing grass roots and stones, the collected soil was spread flat on a transparent plastic sheet, placed in a ventilated place, and dried naturally for 2 to 3 days, then passed through a 2 mm sieve for later use. The soil organic matter content is 3.62%, the total nitrogen content is 0.19%, and the total phosphorus content is 5.4 g·kg -1 , total potassium 787.3 mg·kg -1 , pH7.28, soil water content 4.13%, electrical conductivity 0.44 ms cm -1 . The contents of Cd, Cu and Zn in the soil were 7.13, 146.31 and 795.56 mg·kg, respe...

Embodiment 2

[0080] The method of NTA and 3-indoleacetic acid mixture fortifying tall fescue to enrich soil heavy metals in sewage irrigation area:

[0081] (1) Handling of materials:

[0082] The perennial tall fescue ( Festuca arundinacea L . ) is the experimental material;

[0083] Chelating agent selects nitrilotriacetic acid; 3-indoleacetic acid

[0084] The soil for the test was taken from the sewage irrigation area of ​​Xiqing District, Tianjin. After removing grass roots and stones, the collected soil was spread flat on a transparent plastic sheet, placed in a ventilated place, and dried naturally for 2 to 3 days, then passed through a 2 mm sieve for later use. The soil organic matter content is 3.62%, the total nitrogen content is 0.19%, and the total phosphorus content is 5.4 g·kg -1 , total potassium 787.3 mg·kg -1 , pH7.28, soil water content 4.13%, electrical conductivity 0.44 ms cm -1 . The contents of Cd, Cu and Zn in the soil were 7.13, 146.31 and 795.56 mg·kg, respe...

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Abstract

The invention discloses a method for restoring heavy metal in sewage irrigation soil through NTA and 3-indoleacelic acid (IAA)-enhanced festuca arundinacea. A mixture comprises chelating agent nitrilotriacetic acid and 3-indoleacelic acid in a mole ratio of 6-12mmol.kg<-1> to 2mg.kg<-1>. Experimental results show that under certain concentration, the plant toxicity of heavy metal and the chelating agent on festuca arundinacea can be relieved through the addition of IAA, and the accumulation of the plant on the heavy metal can be facilitated; the improvement of the above-ground biomass of the festuca arundinacea can be promoted through combination of the NTA and 3-indoleacelic acid. By comparing the combination of the IAA and NTA with the control group, the content of above-ground heavy metal of the festuca arundinacea can be increased, and therefore, more heavy metal can be extracted and accumulated by lawn plant, and the heavy metal-polluted soil can be restored to the maximum extent.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and relates to a method for using NTA and 3-indole acetic acid to strengthen tall fescue to enrich soil heavy metals in sewage irrigation areas. Background technique [0002] my country's water resources are facing various pollution problems, and the lack of water resources has become one of the important factors restricting my country's economic development. Reasonable use of sewage irrigation can not only alleviate the problem of water shortage, but also save water resources and reduce environmental pollution. Sewage irrigation refers to the harmless treatment of urban domestic sewage and industrial wastewater, which is directly or indirectly used for farmland sewage irrigation, garden sewage irrigation and underground reservoir recharge. After the founding of the People's Republic of China, my country began to build sewage irrigation projects in 1957, and it has lasted for mo...

Claims

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Application Information

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IPC IPC(8): C09K17/14A01G1/00
Inventor 多立安赵树兰常晨
Owner TIANJIN NORMAL UNIVERSITY
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