Passivator and low-accumulation flower combined remediation method for lead-cadmium contaminated soil

A cadmium-contaminated soil and soil-contaminated technology is applied in the application field of lead-cadmium-contaminated soil agronomic combination and low-accumulation plants, which can solve the problems that the application value of plants has not been fully tapped, achieve restoration and biodiversity, improve soil degradation and Reduced productivity, reduced mobility effects

Pending Publication Date: 2021-03-26
KUNMING UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] Restoration The treatment technology of flowers after harvest is also an important part of flower plant restoration technology, but the application value of repaired plants has not yet been fully explored

Method used

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  • Passivator and low-accumulation flower combined remediation method for lead-cadmium contaminated soil

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Embodiment Construction

[0016] The present invention will be described in further detail below in conjunction with specific embodiments, but the protection scope of the present invention is not limited to the content described.

[0017] The application of lead and cadmium polluted soil agronomic combination in this embodiment plus low accumulation plants, such as figure 1 As shown, the method includes the following steps:

[0018] (1) Using soil contaminated with cadmium and lead as the growth medium of flowers, record and analyze the corresponding cadmium and lead contents in the aerial parts of 18 kinds of flowers, record the yield of 18 kinds of flowers at the same time, and record the roots, stems, leaves and flowers of different corn varieties The ability to absorb, accumulate and distribute cadmium and lead; through the analysis of the corresponding cadmium and lead content in the above-ground parts of 18 kinds of flowers, the maize varieties with higher enrichment coefficients for cadmium and ...

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Abstract

The invention relates to application of lead-cadmium contaminated soil agronomic combination plus low-accumulation plants, which comprises the following steps of: (1) taking biomass charcoal (0, 15g and 30g), calcium superphosphate (0, 1.5g and 3g) and chicken manure compost (0, 15g and 30g) as research materials, taking orthogonal test design as a research method, and uniformly scattering a passivator into lead-cadmium contaminated soil; and (2) sowing a low-accumulation flower variety into the soil treated in the step (1) to emerge, survive and grow, absorbing metal cadmium or lead in the contaminated soil through the passivator in the soil and a flower root system, and transferring the metal cadmium or lead to the overground part. The method has the advantages that: a heavy metal polluted farmland passivation and low-accumulation flower crop combined remediation technology is utilized, and safe production of agricultural products is achieved.

Description

technical field [0001] The invention belongs to the field of soil pollution prevention and control, and particularly relates to the application of an agronomic combination and low-accumulation plants in lead-cadmium-contaminated soil. Background technique [0002] The accumulation of heavy metals in the soil to a certain extent will cause toxicity to the soil-plant system, resulting in soil degradation, crop yield and quality decline. Heavy metal pollution has become one of the most widely polluted and most harmful environmental problems today. According to the 2014 National Soil Pollution Survey Bulletin, the total excess rate of soil pollution in my country is 16.1%, of which the rate of pollutants in cultivated land exceeds the standard rate is 19.4%, and the excessive rates of heavy metals lead and cadmium account for 10% of the rate of inorganic pollutants. 1.5%, 7%, and the toxicity coefficient of Pb and Cd is larger, and the potential harm is greater. Heavy metals suc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/08
CPCB09C1/08
Inventor 曾和平王锦罗昱冯凯萍李兴剑
Owner KUNMING UNIV OF SCI & TECH
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