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Method of accelerating accumulation of heavy metals cadmium and zinc by sedum alfredii hance

A heavy metal and soil technology, applied in the field of phytoremediation of heavy metal pollution in soil, can solve the problems of increasing the solubility of heavy metals in soil, low degradation ability of artificial chelating agents, hindering normal growth of plants, etc., and achieves improvement of remediation efficiency, low cost and small amount of engineering. Effect

Inactive Publication Date: 2016-09-07
WUHAN UNIV OF TECH
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The activity of heavy metals in polluted soil is generally low, and most of the hyperaccumulator plants have small biomass, resulting in low remediation efficiency and long remediation time of plants. In order to further improve the remediation efficiency of plants to heavy metals, chelation induction technology has been widely proposed and proposed. The main reason is that chelating agents can increase the solubility of heavy metals in soil and promote the accumulation of heavy metals in plants
Currently commonly used and researched artificial chelating agents can effectively improve the efficiency of plants in remediating soil heavy metals, but most of the artificial chelating agents have low degradation ability and can remain in the soil for a long time, which has potential ecological risks, while degradable chelating agents The chelating agent is difficult to be applied due to its high price, and the high concentration of the chelating agent will cause stress to the plant and hinder the normal growth of the plant

Method used

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  • Method of accelerating accumulation of heavy metals cadmium and zinc by sedum alfredii hance
  • Method of accelerating accumulation of heavy metals cadmium and zinc by sedum alfredii hance
  • Method of accelerating accumulation of heavy metals cadmium and zinc by sedum alfredii hance

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Embodiment 1

[0024] The present embodiment establishes 7 experimental groups altogether, is respectively: CK (blank group), 1.5mmol / Kg GLDA (G1), 3mmol / Kg GLDA (G2), 6mmol / Kg GLDA (G3), 2μmol / Kg IAA (I1 ), 10 μmol / Kg IAA (I2), 50 μmol / Kg IAA (I3), each experimental group was repeated 3 times, with a total of 21 pots of plants. Sedum sedum is propagated by cuttings. After the root grows a relatively vigorous root system, it is transplanted into a potted plant. It is planted in a pit of three plants, that is, three plants in each pot are planted together, and the plants are regularly watered during planting. The soil moisture content is kept at 60-80% of the field water holding capacity. After the plant grows to the 80th day, add phytohormone (auxin IAA) and chelating agent (GLDA) to the soil. The addition method is to dissolve phytohormone and chelating agent in 500mL water to form a mixed solution, and then spray it on the southeast view Around the Tiangen system, after 10 days of continu...

Embodiment 2

[0029] In this embodiment, 10 experimental groups were set up, see Table 2 for details, and each experimental group was repeated 3 times, with a total of 33 pots of plants. Sedum sedum is propagated by cuttings. After the root grows a relatively vigorous root system, it is transplanted into a potted plant. It is planted in a pit of three plants, that is, three plants in each pot are planted together, and watered regularly during the planting period to make the soil The water content is kept at 60-80% of the field water holding capacity. After the plant grows to the 90th day, add phytohormone (auxin IAA) and chelating agent (GLDA) to the soil. The addition method is to dissolve the phytohormone and chelating agent in 500mL water to form a mixed solution, and then spray it on the southeast view Around the Tiangen system, after 10 days of continuous growth of Sedum sedum, the plants were sampled according to the above-ground and underground parts, and the biomass of the plants an...

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Abstract

The invention relates to a method of accelerating accumulation of heavy metals cadmium and zinc by sedum alfredii hance. The method comprises the following steps: 1) planting sedum alfredii hance on soil polluted by heavy metals cadmium and zinc; when the sedum alfredii hance grows to 80-90 days, adding plant hormones and a chelating agent into the soil; and moving the integral plant from the soil in 10 days for harmless treatment; and 2) detecting concentration of heavy metals cadmium and zinc in the soil; if the concentration does not meet the environmental safety standard, then planting the next batch of sedum alfredii hance; and repeating the process of the step 1) till the concentration of heavy metals cadmium and zinc in the soil meets the environmental safety standard. According to the method provided by the invention, by using the degradable chelating agent GLDA and applying growth hormones in a matched manner, the repair efficiency of soil polluted by heavy metals cadmium and zinc by the plant sedum alfredii hance is effectively improved, and secondary pollution on the environment is not caused. The method has the characteristics of low cost, high operability, safety and the like, and has good social, economical and environmental benefits.

Description

technical field [0001] The invention belongs to the field of phytoremediation of soil heavy metal pollution, and relates to a method for promoting the accumulation of heavy metal cadmium and zinc by using plant hormones and chelating agents. Background technique [0002] With the rapid development of industrialization, the dumping of industrial waste, coal mining, metallurgy, excessive use of chemical fertilizers and pesticides have caused soil pollution to become increasingly serious. According to incomplete statistics, the area of ​​cultivated land polluted by heavy metals in the country has reached 20 million hectares, about It accounts for 1 / 5 of the total arable land area. In addition, heavy metal pollution also poses a serious threat to national health. [0003] Cadmium and zinc are common heavy metals. Zinc is an essential element for human protein. However, excessive zinc in the human body can cause intractable anemia, affect cholesterol metabolism, and lead to serio...

Claims

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Application Information

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IPC IPC(8): B09C1/10
CPCB09C1/105
Inventor 李晔袁江许剑臣李柏林肖华锋
Owner WUHAN UNIV OF TECH
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