Farmland heavy metal contaminated soil passivator as well as preparation method and application thereof

A passivating agent and soil technology, applied in the field of contaminated soil remediation, can solve the problems of inconvenient operation, high cost, and long repair time, so as to reduce the activity and mobility of cadmium, weaken the ability of migration and diffusion, and reduce the chemical effectiveness Effect

Inactive Publication Date: 2020-06-23
JIANGSU GEOLOGICAL SURVEY INST +1
View PDF6 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among these technologies, engineering measures are only suitable for small-area and heavily polluted soil remediation due to the large amount of engineering involved and high cost; for large-area farmland heavy metal pollution remediation not only requires a lot of manpower, material resources, high cost, but also easy Causes the weakening of farmland fertility and the destruction of the plow layer; although the agronomic control measures have the characteristics of simple operation, low cost and relatively mature technology, etc.
However, in the agronomic control measures, the adjustment of planting structure may make it difficult for farmers to accept; water management technology requires long-term flooding, which will have an adverse effect on crop rotation in dry season; currently, lime is mainly used to adjust the pH value of acidic soil. A series of negative effects, and the effect is generally low, and the operation is extremely inconvenient; phytoremediation technology is generally suitable for heavily polluted farmland with heavy metals, the repair effect is stable, the cost is low, and there is no secondary pollu

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
  • Farmland heavy metal contaminated soil passivator as well as preparation method and application thereof
  • Farmland heavy metal contaminated soil passivator as well as preparation method and application thereof
  • Farmland heavy metal contaminated soil passivator as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] This embodiment relates to a pot experiment: a pot experiment of paddy rice in cadmium-contaminated farmland soil was carried out using the passivator A obtained by the present invention, and the soil for testing was yellow-brown farmland soil. Soil physical and chemical properties: Cd=1.20-4.25mg / kg, pH=5.36, OM=1.67 g / kg, CEC: 18.46cmol / kg, the average content of other metals Cr, Cu, Ni, Pb, Zn are 42.45 mg / kg, 16.02 mg / kg, 20.8 mg / kg, 34.08 mg / kg, 65.33 mg / kg.

[0041] The passivation agent A for soil application is composed of natural zeolite minerals, ferrous sulfate with a mass fraction of 10% natural zeolite minerals, and brucite with a mass fraction of 30% natural zeolite minerals. The potted rice experiment set up 5 groups of experiments, the control group (CK) and 4 treatment groups, 6kg of experimental soil in each group, and 4 kinds of ratios in the treatment groups (passivator A): 1.0%, 2.0%, 3.0%, 5.0%, The rice variety is Dao 2845.

[0042] After the r...

Embodiment 2

[0047] The farmland with cadmium pollution in Jiangsu Province was used as a field experiment, and the test plan was set up according to the area of ​​the natural field, and the passivator A was spread according to 4 proportions of 5.0%, 3.0%, 2.5%, and 1.0%, and no material was applied to the control area. The passivator A is made by mixing natural zeolite minerals, ferrous sulfate with a mass fraction of 10% natural zeolite minerals, and brucite with a mass fraction of 30% natural zeolite minerals. The test crops were rice (Dao 2845) and wheat (Ningmai 13). Field management follows the principle of optimum and consistency. Except for the application of passivation agents, other fertilization, weeding, and irrigation measures are consistent among treatments and meet production requirements.

[0048] The experimental field was prepared on May 26, plowed, and the passivation agent was sown. Rice was planted on June 8. After the rice matured, soil samples of the plow layer and ...

Embodiment 3

[0060] Mercury-contaminated farmland was carried out as a field experiment in Jiangsu Province. The test plan was set up according to the area of ​​the natural field, and the control group and the treatment group were set up. Passivator B was spread according to three ratios of 3.0%, 2.0%, and 1.0%. The control area was not Apply any material. Passivator B is made of natural zeolite minerals, ferrous sulfate is 20% of the natural zeolite minerals, brucite is 10% of the natural zeolite minerals, and the raw material components are crushed to 60-100 mesh and then mixed . The test crop was rice (Nanjing 46). The field management followed the principle of optimum and consistency. Except for the application of passivation agent, other fertilization, weeding, and irrigation measures were consistent among the treatments and met the production requirements.

[0061] The experimental field was prepared on May 28, plowed, and passivation agent was sown. Rice was planted on June 12. A...

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

No PUM Login to view more

Abstract

The invention provides a soil passivator, a preparation method thereof and application of the soil passivator in farmland heavy metal pollution remediation, and relates to farmland heavy metal pollution soil remediation. The passivator is prepared from the following raw materials: natural zeolite, ferrous sulfate and brucite, the use amount of the ferrous sulfate is 10%-50% of the mass of the natural zeolite, the use amount of the brucite is 10%-40% of the mass of the natural zeolite, and the passivator can be obtained by uniformly mixing all the components. The passivator nt is simple in preparation method, natural in raw material source, free of secondary pollution to soil and convenient to construct, farmland fallow is not needed during application, the passivator is applied in leisureseasons, and normal agricultural planting is not affected; the passivator provided by the invention is low in price and obvious in remediation effect, can effectively reduce the content of heavy metals in crops and the content of available heavy metals in soil, and has a good application prospect in the aspect of remediation of large-scale heavy metal contaminated farmlands.

Description

technical field [0001] The invention belongs to the technical field of contaminated soil remediation, and in particular relates to a passivator for farmland heavy metal polluted soil, a preparation method and application thereof. Background technique [0002] With the accelerated development of industrialization and urbanization, the pollution of heavy metals in cultivated soil in my country is becoming more and more serious. At present, heavy metal pollution in my country's farmland soil presents a trend of spreading from point to surface, from the periphery of large and medium-sized cities to rural areas in the outer suburbs, and the quality and safety of agricultural products are seriously threatened by heavy metal pollution. In southern acid rice regions, such as Hunan, Jiangxi, Hubei, Sichuan, Guangxi, Yunnan, Guangdong and other regions, heavy metal cadmium pollution in farmland soil is more common, especially in rice. The 2014 "National Soil Pollution Survey Bulletin...

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): C09K17/08B09C1/08C09K101/00
CPCB09C1/08B09C2101/00C09K17/08C09K2101/00
Inventor 罗远恒郝社锋郭伟伟常国兴许伟伟葛礼强
Owner JIANGSU GEOLOGICAL SURVEY INST
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