Application of houttuynia cordata in restoring lead-polluted soil

A technology for remediating soil and Houttuynia cordata, applied in the field of phytoremediation, can solve problems such as insufficient plant resources, and achieve the effects of strong operability, low energy consumption, and less environmental disturbance

Inactive Publication Date: 2010-02-10
SICHUAN AGRI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The inventor has found that Houttuynia cordata has a certain characteristic of absorbing and extracting lead in soil during a large amount of long-term experimental research; therefore, the main purpose of the present invention is to address the lack of plant resources that can be used for phytoremediation of soil lead pollution in the above-mentioned prior art to provide a new plant resource that can be used to remediate soil lead pollution, and Houttuynia cordata can be reasonably used to remediate soil lead pollution; it has the characteristics of simplicity, high efficiency, safety, and low cost.

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  • Application of houttuynia cordata in restoring lead-polluted soil

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Embodiment 1

[0021] This embodiment is the application of Houttuynia cordata in remediating soil lead pollution, and the specific application method is as follows:

[0022] The soil samples were collected from the paddy soil in the Houttuynia cordata planting base of Sanjiu Pharmaceutical Industry, Yanqiao Town, Yucheng District, Ya'an City. The soil samples were air-dried, crushed, passed through a 2-mesh sieve and mixed evenly for soil culture. With Pb(NO 3 ) 2 Supply soil lead, set nine treatment concentrations: 0, 250, 500, 1000, 1500, 2000, 3000mg / kg (Pb 2+ ), add water repeatedly, and air-dry naturally; pre-cultivate in this way for three months. The lead contents in the soil were: 39.02, 286.0, 539.0, 1039, 1539, 2039, 3039mg / kg. Add inorganic fertilizer (according to N:P 2 o 5 : K 2 O ratio is 1: 0.42: 2.37) as base fertilizer, after air-drying, pot experiment is carried out. It was planted in November, and each treatment was repeated 4 times. Each pot was filled with 10kg ...

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Abstract

The invention discloses an application of houttuynia cordata in restoring lead-polluted soil, wherein, the houttuynia cordata is planted in lead-polluted soil to absorb and extract lead in the soil inorder to solve the lead pollution problem of soil permanently; the application has the characteristics of lower energy consumption, strong operability, less environmental disturbance, no damage to physicochemicai properties of soil and no secondary pollution; the accumulated heavy metals in the soil can also recycled by advanced technology while environment treatment, thus creating certain economic benefit; and the application also has the advantages of low expenditure, great suitability for large-area heavy-metal-polluted soil and the like.

Description

technical field [0001] The invention belongs to the technical field of phytoremediation of soil polluted by heavy metals, and in particular relates to the application of plant Houttuynia cordata in repairing lead pollution in soil. Background technique [0002] Lead is very closely related to human life. Lead exists in the entire environment. Lead in the environment mainly comes from mining, smelting industry, and the production and use of lead-containing paint, paper, gasoline, explosives, etc., while urban sewage and sludge Also contains a lot of lead. The continuous development and utilization of natural resources by humans for thousands of years, coupled with the rapid development of industry, has caused increasingly serious global lead pollution. Soil lead pollution will affect soil microorganisms, soil enzyme activity and soil physical and chemical properties. A certain amount of lead will accumulate in plants, which will endanger human health through the food chain....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/00A01G1/00
Inventor 伍钧孟晓霞杨刚张小洪孙百晔
Owner SICHUAN AGRI UNIV
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