Application of pityrogramme calomelanos link in restoration of soil polluted by cadmium

A technology for cadmium-contaminated soil and powdery fern, which is applied in the field of phytoremediation of heavy metal-contaminated soil, can solve problems such as insufficient plant species resources, and achieve the effects of remarkable purification effect, high economic value, and simple and easy operation.

Inactive Publication Date: 2012-07-04
CHONGQING UNIV OF ARTS & SCI
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  • Abstract
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  • Claims
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Problems solved by technology

[0006] The purpose of the present invention is: to the above-mentioned prior art can be used for the problem of insufficient plant species resource of heavy metal cadmium polluted soil, provide a kind of new plant resource that can be used for repairing heavy metal cadmium polluted soil remediation, rational use Remediation of cadmium-contaminated soil has the characteristics of low investment, low operating cost, simple and easy operation, and no secondary pollution.

Method used

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  • Application of pityrogramme calomelanos link in restoration of soil polluted by cadmium
  • Application of pityrogramme calomelanos link in restoration of soil polluted by cadmium
  • Application of pityrogramme calomelanos link in restoration of soil polluted by cadmium

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Embodiment 1

[0026] This embodiment is the application of fern to repair cadmium-contaminated soil, and the specific application methods are as follows:

[0027] The soil was collected from Cucumber Hill, Yongchuan District, Chongqing City. The soil was air-dried, crushed, sieved through a 2-mesh sieve, and then mixed evenly for soil cultivation experiments. Load the same weight (5Kg) soil in each pot during the test, and add different concentrations of CdCl 2 Reagent, mix the reagent with soil and age for one month. The cadmium content in the soil was 0, 100, 500, 1000, 1500, 2000, 2500mg / Kg soil respectively, and each treatment was repeated 3 times. One month later, pick ferns with the same size as possible and plant them in pots, and cultivate them in the net room. Water occasionally, keep the soil moist, weeding. Harvest the plants when they grow to a certain extent, weigh their biomass, and analyze the cadmium content in different parts of the plants.

[0028] The biomass, cadmiu...

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Abstract

The invention discloses application of pityrogramme calomelanos link in restoration of soil polluted by cadmium. The pityrogramme calomelanos link is planted in the soil polluted by the cadmium. Due to the absorption effect of the pityrogramme calomelanos link on the cadmium and tenacious vitality of the pityrogramme calomelanos link, the pityrogramme calomelanos link can be directly planted without special management, and the problem of cadmium pollution to the soil is solved permanently according to perennial characteristics. The pityrogramme calomelanos link has small investment, low operating cost and a good effect, is easy to operate and is practicable; secondary pollution can be prevented while a purification effect is ensured; the accumulated heavy metal can be recycled by an advanced technology, so that a certain economic benefit is created; and the pityrogramme calomelanos link is suitable to be popularized in a large area.

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 remediation of cadmium-contaminated soil by using fern fern. Background technique [0002] Cadmium is recognized as a major food contaminant after aflatoxin and arsenic (As). The clinical manifestations of cadmium poisoning are nausea, vomiting, abdominal pain, diarrhea and other gastrointestinal irritation symptoms in mild cases. In severe cases, profuse sweating, collapse, dizziness, convulsions, shock due to dehydration, and even acute renal failure may occur. And die. In recent years, there have been a large number of reports on cadmium poisoning. Therefore, remediation of cadmium-contaminated soil has become one of the urgent problems to be solved in the sustainable utilization of soil in my country. [0003] Phytoremediation technology is an emerging heavy metal-contaminated soil remediation technology. Its princi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/00
Inventor 朱启红夏红霞
Owner CHONGQING UNIV OF ARTS & SCI
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