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The method of nta and 3-indoleacetic acid leaching agent to restore heavy metals in lawn of sewage irrigation soil

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

Inactive Publication Date: 2016-06-22
TIANJIN NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • The method of nta and 3-indoleacetic acid leaching agent to restore heavy metals in lawn of sewage irrigation soil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] (1) Material handling:

[0059] Choose the more common perennial tall fescue (Festucaarundinacea L.) in northern my country as the experimental material;

[0060] Chelating agent is nitrilotriacetic acid; 3-indole acetic acid

[0061] The test soil 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 cloth, placed in a ventilated place, and dried in natural air for 2 to 3 days, and then passed through a 2mm sieve for use. Soil organic matter content is 3.62%, total nitrogen content is 0.19%, total phosphorus content is 5.4g·kg -1 , Total potassium 787.3mg·kg -1 , PH7.28, soil water content 4.13%, conductivity 0.44ms·cm -1 . The content of Cd, Cu and Zn in the soil are 7.13, 146.31 and 795.56 mg·kg, respectively -1 , Which are respectively 23.8, 1.5 and 3.2 times of the secondary soil environmental quality standard (GB156182-1995).

[0062] Preparation of artif...

Embodiment 2

[0067] (1) Material handling:

[0068] Choose the more common perennial tall fescue (Festucaarundinacea L.) in northern my country as the experimental material;

[0069] Chelating agent is nitrilotriacetic acid; 3-indole acetic acid

[0070] The test soil 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 cloth, placed in a ventilated place, and dried in natural air for 2 to 3 days, and then passed through a 2mm sieve for use. Soil organic matter content is 3.62%, total nitrogen content is 0.19%, total phosphorus content is 5.4g·kg -1 , Total potassium 787.3mg·kg -1 , PH7.28, soil water content 4.13%, conductivity 0.44ms·cm -1 . The content of Cd, Cu and Zn in the soil are 7.13, 146.31 and 795.56 mg·kg, respectively -1 , Which are respectively 23.8, 1.5 and 3.2 times of the secondary soil environmental quality standard (GB156182-1995).

[0071] Preparation of artif...

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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 leaching and repairing heavy metals in sewage-irrigated soil lawns by using NTA and 3-indoleacetic 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 construct sewage irrigation projects in 1957, and it has been more than half a century. During this period, my country also adopted relevant sewage irrigation principles, guidelines and standards. Sewage contains a large amount of heavy metal elements. The accumulation in the soil will affect the absorption and utilization of nutrients by plants, and it will also disrupt the metabolic balance of plants. Field experiments w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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