Method for remediating heavy metals in sewage irrigated soil lawn by NTA (nitrilotriacetic acid) and 3-heteroauxin eluting agent

A kind of indole acetic acid leaching agent, the technology of indole acetic acid is applied in the directions of gardening methods, chemical instruments and methods, botanical equipment and methods, etc., and can solve problems such as no literature reports and the like

Inactive Publication Date: 2014-06-11
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-indole acetic acid to wash and repair soil heavy metals in lawn planting systems in sewage irrigation areas.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] (1) Handling of materials:

[0059] The perennial tall fescue ( Festuca arundinacea L . ) is the experimental material;

[0060] Chelating agent selects nitrilotriacetic acid; 3-indoleacetic acid

[0061] 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, respectively -1 , which are 23.8, 1.5 and 3.2 times of the secondary standard of soil environmental quality (GB156182-1995), respectively.

...

Embodiment 2

[0067] (1) Handling of materials:

[0068] The perennial tall fescue ( Festuca arundinacea L . ) is the experimental material;

[0069] Chelating agent selects nitrilotriacetic acid; 3-indoleacetic acid

[0070] 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, respectively -1 , which are 23.8, 1.5 and 3.2 times of the secondary standard of soil environmental quality (GB156182-1995), respectively.

...

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PUM

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Abstract

The invention discloses a method for remediating heavy metals in a sewage irrigated soil lawn by an NTA (nitrilotriacetic acid) and 3-heteroauxin eluting agent. The NTA and 3-heteroauxin eluting agent contains a chelating agent nitrilotriacetic acid and 3-heteroauxin are included, wherein the mol ratio of the chelating agent nitrilotriacetic acid to the 3-heteroauxin is 6-12 mmol.kg<-1>:2mg.kg<-1>. The invention also discloses application of the method for remediating heavy metals in soil of a plant body system established in a sewage irrigated region lawn to the promotion of elution and remediation effects of the heavy metals. A compound remediating agent means that 6 mmol.kg<-1> NTA and 3-heteroauxin are used for eluting and remediating sewage irrigated soil.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and relates to a method for rinsing and repairing heavy metals in sewage irrigation soil and lawn by using NTA and 3-indole acetic acid. Background technique [0002] 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 more than half a century. During this period, my country has also passed relevant sewage irrigation principles, guidelines and standards. Sewage contains a large amount of heavy metal elements, and accumulation in the soil will affect the absorption and utilization of nutrients by plants, as well as disturb the metabolic balance of plants. Field experi...

Claims

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Application Information

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IPC IPC(8): C09K17/14B09C1/08A01G1/00A01G7/00
Inventor 赵树兰多立安常晨
Owner TIANJIN NORMAL UNIVERSITY
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