Method for restoring cadmium contaminated soil by using cypress seedlings

A technology for cadmium-contaminated soil and cadmium-contaminated soil is applied in the field of phytoremediation of environmental pollution, which can solve the problems of long restoration time, low restoration efficiency, secondary pollution, etc., and achieves the effects of high restoration efficiency, efficient absorption and aggregation, and developed root system.

Inactive Publication Date: 2010-12-15
ZHEJIANG ACADEMY OF AGRICULTURE SCIENCES
View PDF0 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a kind of repairing while developing, less investment, qu

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for restoring cadmium contaminated soil by using cypress seedlings
  • Method for restoring cadmium contaminated soil by using cypress seedlings
  • Method for restoring cadmium contaminated soil by using cypress seedlings

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0018] Example 1: (Comparison test of different cadmium treatment concentrations in potted plants of blue ice cypress seedlings)

[0019] (1) Test materials and plan layout

[0020] 1. Test materials

[0021] Soil: Coarse silt soil collected from the tidal flats of Shangyu City, Zhejiang Province. Its basic physical and chemical properties are as follows: pH 5.7, organic matter content 5.3 g kg -1 、Available phosphorus 3.4mg kg -1 , Alkaline hydrolysis nitrogen 45mg kg -1 、Quick-acting potassium 67mg kg -1 , Cadmium was not detected (determined by atomic absorption instrument, PE company, USA).

[0022] Lan Bingbai: purchased from Xiaoshan Nursery District, Zhejiang Province.

[0023] 2. Pot experiment

[0024] The potting soil to be tested was set with 4 cadmium concentration treatments, each of which was 0 mg kg -1 , 50mg kg -1 , 100mg kg -1 , 200mg kg -1 To CdCl 2 Form to join. Among them, without cadmium (0mg kg -1 ) The treatment was 4 repetitions, the remaining 3 treatments were 8...

Example Embodiment

[0044] Example 2: (Comparative Test of Different Cadmium Treatment Concentrations in Potted Cypress Seedlings)

[0045] (1) Test materials and plan layout

[0046] Longbai seedlings were purchased from Xiaoshan Nursery Area, Zhejiang Province;

[0047] The rest of the test materials, pot experiment, analysis method and data processing are the same as in Example 1;

[0048] (2) Test results

[0049] Table 3 Roots, stems, leaves and dry weight of the whole plant (g / plant) of each treatment

[0050]

[0051] Different letters in the table represent significant differences (p<0.05)

[0052] It can be seen from Table 3 that the biomass of cypress leaves and roots accounted for a relatively large proportion of the whole plant, 45% and 37%, respectively, while the proportion of stems was relatively small. At 50 and 100 mg kg -1 Under the cadmium treatment, compared with the control treatment (without cadmium), the dry weight of the roots, stems and leaves of cypress had no significant change (p...

Example Embodiment

[0059] Example 3: (Comparative test of different cadmium treatment concentrations of Platycladus orientalis seedlings potted plants)

[0060] (1) Test materials and plan layout

[0061] Platycladus arborvitae seedlings were purchased from Xiaoshan Nursery Area, Zhejiang Province;

[0062] The rest of the test materials, pot experiment, analysis method and data processing are the same as in Example 1;

[0063] (2) Test results

[0064] Table 5 Roots, stems, leaves and dry weight of the whole plant of Platycladus orientalis (g / plant)

[0065]

[0066] Different letters in the table represent significant differences (p<0.05)

[0067] It can be seen from Table 5 that the biomass of Platycladus orientalis leaves accounted for a large proportion of 55% in the whole plant, while the proportion of stems and roots was relatively small. At 50 and 100 mg kg -1 Under cadmium treatment, compared with the control treatment (without cadmium), the dry weight of Platycladus orientalis roots, stems, and l...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Diameteraaaaaaaaaa
Login to view more

Abstract

The invention discloses a method for restoring cadmium contaminated soil by using cypress seedlings, belonging to the technical field of phytoremediation of environmental pollution. The method comprises the following steps of: selecting soil with cadmium pollution which is less than or equal to 100mg kg<-1>; planting annual or biennial cypress seedlings in the open air; watering and supplying fertilizers in due time in order to retain soil moisture content from 60 percent to 80 percent; selling or transplanting the cypress seedlings which are transplanted from the nursery in autumn of the current year or in spring of the following year; and continuously multi-cropping and managing in the original field until the cadmium pollution of the soil of the field is reduced to a safety standard which is lower than 1mg kg<-1>. The method is characterized in that the cypress seedlings have strong cadmium toxicity resistance and high restoration efficiency, the transplanted seedlings have no secondary pollution for a soil body, medium and mild cadmium contaminated soil can be restored and used in time, and the like. The method can be widely applied to medium and mild cadmium contaminated soil areas.

Description

technical field [0001] The invention relates to the technical field of phytoremediation of environmental pollution, in particular to a method for remediating soil polluted by cadmium by using cupressaceae green seedlings. Background technique [0002] Cadmium is a heavy metal element that widely exists in nature. In recent years, due to unnatural sources such as human activities, such as mineral mining, sewage irrigation, long-term application of various cadmium-containing fertilizer materials, phosphate fertilizers, and industrial waste gas deposition, the problem of environmental pollution caused by cadmium has become increasingly serious. According to "Soil Environmental Quality Standards" (GB 15618-1995), the critical value of soil cadmium pollution is 1mg kg -1 . Cadmium pollution in my country's agricultural soil is relatively common. In 1990, the soil contaminated by cadmium had reached more than 200,000 mu. For example, the average cadmium content in cadmium-conta...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): B09C1/00
Inventor 郭彬丁能飞林义成刘琛傅庆林李华李凝玉李橙
Owner ZHEJIANG ACADEMY OF AGRICULTURE SCIENCES
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap