Strengthening method for remedying soil contaminated by metal strontium through ryegrass and application

A technology for polluted soil and ryegrass is applied in the field of strengthening ryegrass to remediate strontium metal-contaminated soils, which can solve problems such as restricting agricultural and animal husbandry production and social and economic development, and achieve the effects of improving the remediation of heavy metal-contaminated soils, with simple technology and wide sources.

Active Publication Date: 2018-08-14
HENAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the above-mentioned problems that the heavy metal pollution of the land seriously restricts the agricultural production and social and economic development in this area, the present invention provides a method and application of strengthening ryegrass to remediate metal strontium-contaminated soil

Method used

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  • Strengthening method for remedying soil contaminated by metal strontium through ryegrass and application
  • Strengthening method for remedying soil contaminated by metal strontium through ryegrass and application
  • Strengthening method for remedying soil contaminated by metal strontium through ryegrass and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A method for strengthening ryegrass to restore metal strontium-contaminated soil, comprising the following steps:

[0020] 1) Add metal strontium solution 100 mg / kg to the soil, mix evenly into the soil, and age for 2 weeks;

[0021] 2) Prepare saponin into a solution with a concentration of 2-5 mmol / L;

[0022] 3) The saponin solution in step 2) is added to the soil prepared in 1);

[0023] 4) Cultivate for 30 days, and measure the elution effect of different concentrations of saponin on the metal strontium in the soil.

[0024] Table 1 The effect of different concentrations of saponin on the elution of metal strontium in soil

[0025]

[0026] Note: Different letters in the same column indicate significant differences between treatments ( P <0.05). Same below

[0027] Table 1 shows the adsorption capacity and removal rate of metal strontium in the soil with different concentrations of saponin. It can be seen from Table 1 that after the application of 4-5mmol / ...

Embodiment 2

[0029] A method for strengthening ryegrass to restore metal strontium-contaminated soil, comprising the following steps:

[0030] 1) Rinse the ryegrass seeds after disinfection with 0.5% hypochlorous acid;

[0031] 2) Put the seeds in step 1) into a petri dish with nutrient solution to germinate for 3 to 5 days and then transplant them into strontium-contaminated soil;

[0032] 3) Divide the ryegrass in step 2) into two groups;

[0033] 4) A group of ryegrass in step 2) is not applied with mowing measures;

[0034] 5) The other group of ryegrass in step 2) was mowed after 45 days of growth, the stubble height was 1-4 cm, and continued to grow to 90 days;

[0035] 6) The ryegrass in step 4) and step 5 continued to grow until 90 days, and the ryegrass was harvested. Determination of aboveground and root biomass of ryegrass.

[0036] Table 2 Biomass of ryegrass with different cutting measures

[0037]

[0038] It can be seen from Table 2 that the biomass of ryegrass incre...

Embodiment 3

[0040] A method for strengthening ryegrass to restore metal strontium-contaminated soil, comprising the following steps:

[0041] Weigh 4kg soil sample (air-dried soil), and add metal strontium concentration of 100 mg / kg. After mixing evenly, put it into a plastic basin (the diameter of the wide mouth is 20cm, the diameter of the narrow mouth is 15cm, and the height is 10cm). Aging treatment for 2 weeks. Add tap water to about field water holding capacity, sow after overnight, 30 grains of ryegrass per pot, cover with soil about 2cm after sowing. After emergence, keep 20 seedlings with basically the same growth. Place the pot in a greenhouse and water regularly. The ryegrass was grown for 45 days to take mowing measures, and the stubble height was 2 cm. After the ryegrass continued to grow for 38 days, 4 mmol / L, 4.5 mmol / L, and 5 mmol / L of saponin were added to the soil around the root system, and five parallel experiments were set up. After continuing to grow for 7 days, ...

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Abstract

The invention relates to a strengthening method for remedying soil contaminated by metal strontium through ryegrass and an application. Two strengthening steps of adding a saponin solution and mowingare combined, so that the problems that the growth rate of the ryegrass is low, the biomass of the ryegrass is small, and the concentration of the enriched metal strontium is low are solved, meanwhile, the biomass of the ryegrass can be effectively increased, the remediation time of the ryegrass for the soil contaminated by strontium is shortened, and the level of strontium contamination in the soil is reduced. The strengthening method is wide in raw material source, simple in technology and low in cost.

Description

technical field [0001] The invention relates to the field of strengthening measures for phytoremediation of soil polluted by heavy metals, in particular to a method and application of strengthening ryegrass for remediating metal strontium-contaminated soil. Background technique [0002] Land heavy metal pollution is a worldwide problem. The area of ​​heavy metal pollution in the country is about 10 million hectares, accounting for more than 10% of the total arable land. The economic loss caused by heavy metal pollution in the country is at least 20 billion yuan every year. Seriously restrict the agricultural and animal husbandry production and social and economic development in this region. [0003] At present, there are various measures for improving heavy metal-contaminated soil, among which the chemical measures for improving heavy metal-contaminated soil have received extensive attention and research. In the past improvement measures, the effect of phytoremediation was ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/00
CPCB09C1/105B09C2101/00
Inventor 亓琳方强张利霞李婷王晓凌赵威戴攀峰
Owner HENAN UNIV OF SCI & TECH
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