Application of jerusalem artichokes in repairing cadmium (Cd) polluted environment

A technology that pollutes the environment and cadmium pollution is applied in the field of biological treatment of pollutants, which can solve the problems of limited absorption and accumulation capacity of heavy metals, limited biomass, and environmental pollution.

Inactive Publication Date: 2011-01-26
NANJING AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although there are many studies on the use of hyperaccumulator plants or plants with superaccumulative ability as Cd-polluted environment remediation test materials, some hyperaccumulator plants have been studied, but most of them are crops, herbaceous plants and aquatic plants. Due to ...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Using Jerusalem artichoke (Nanyu No. 1) as the material, the Jerusalem artichoke tubers are rinsed with tap water and distilled water, and then surface sterilized with 0.05% fungicide. The sterilized Jerusalem artichoke tubers with bud-eyes are sown in a plastic pot with quartz sand and a hole in the lower part of the turnover box. The turnover box contains a certain depth of 1 / 2 Hoagland's culture solution. The culture medium was changed every other day, and the quartz sand was fully rinsed each time to ensure the uniformity of the culture conditions and natural light. After the tubers germinate, use 1 / 2 Hoagland’s nutrient solution (2.5mM Ca(NO 3 ) 2 , 2.5mM KNO 3 , 0.5mM KH 2 PO 4 , 0.5mM MgSO 4 , 25μMH 3 BO 3 , 2.25μM MnCl 2 , 1.9μM ZnSO 4 , 0.15μM CuSO 4 , 0.05mM(NH 4 ) 6 Mo 7 O 24 , 5μMFeEDTA, the same below) watering. At the three-leaf stage, thin seedlings are transplanted, one tree per pot is reserved, and three pots are treated for each. Treat at six-leaf stag...

Embodiment 2

[0019] Using Jerusalem artichoke (Nanyu No. 1) as the material, the culture conditions are the same as above, and it is processed at the six-leaf stage, setting 25mg L -1 Cd concentration, directly add the solid CdCl 2 ·2.5H 2 Dissolve O in 1 / 2 Hoagland’s nutrient solution, stir and mix well, and pour. Replace 1 / 2 Hoagland’s culture medium at intervals of the treatment period. Take care not to let the nutrient solution get on the above-ground part of the plant when replacing it. Take samples for testing after three weeks of treatment. The results are as follows: leaf length 7.47cm, leaf width 3.13cm, plant height 15.90cm, root length 12.37cm, root dry weight 0.18g, above ground dry weight 0.51g, whole plant dry weight 0.69g, root Cd concentration 1344.70mg / kg , The Cd concentration in the stem is 174.79mg / kg, the Cd concentration in the leaves is 141.90mg / kg, the root Cd accumulation is 0.24mg, the stem Cd accumulation is 0.09mg, and the leaf Cd accumulation is 0.04mg.

Embodiment 3

[0021] Using Jerusalem artichoke (Nanyu No. 1) as the material, the culture conditions are the same as above, and it is processed at the six-leaf stage, setting 50mg L -1 Cd concentration, directly add the solid CdCl 2 ·2.5H 2 Dissolve O in 1 / 2 Hoagland’s nutrient solution, stir and mix well, and pour. Replace 1 / 2 Hoagland’s culture medium at intervals of the treatment period. Take care not to let the nutrient solution get on the above-ground part of the plant when replacing it. Take samples for testing after three weeks of treatment. The results are as follows: leaf length 7.80cm, leaf width 2.80cm, plant height 15.77cm, root length 11.93cm, root dry weight 0.22g, above ground dry weight 0.64g, whole plant dry weight 0.86, root Cd concentration 2167.90mg / kg, The Cd concentration in the stem was 331.20 mg / kg, the Cd concentration in the leaf was 328.77 mg / kg, the Cd accumulation in the root was 0.48 mg, the Cd accumulation in the stem was 0.21 mg, and the Cd accumulation in the ...

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PUM

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Abstract

The invention relates to application of jerusalem artichokes in repairing a cadmium (Cd) polluted environment. The repairing method comprises the following steps of: planting the jerusalem artichokes on Cd polluted soil, wherein during seeding, a potassium sulfate compound fertilizer is applied; and when the jerusalem artichokes grow until the end of a flowering phase, integrally moving the roots, stems and leaves of the jerusalem artichoke from the polluted environment to remove Cd in the soil. The jerusalem artichokes can be circularly planted in the polluted soil, wherein under the Cd polluted environment, the concentration of Cd content in overground parts and the root parts of the jerusalem artichokes far exceeds 100mg kg<-1>, which is an established critical content standard required to be reached by hyperaccumulators; under the condition of treatment of 200mg of L<-1>Cd, the Cd content of the overground parts reaches higher than 700mg kg<-1>, and the Cd content of the root parts even reaches higher than 25,000 mg kg<-1>; and when the jerusalem artichokes are planted on soil of which the Cd content is 78mg/kg, the Cd concentration in the roots is 12,285.00mg/kg, the Cd concentration in the stems is 344.53mg/kg, the Cd accumulation quantity in the roots is 1044mg, the Cd accumulation quantity in the stems is 60mg, and the Cd accumulation quantity per mu is 2,568.8g.

Description

1. Technical Field [0001] The invention belongs to the technical field of biological treatment of pollutants characterized by plants, and particularly relates to the phytoremediation of environmental heavy metal chromium pollution treatment, and specifically relates to the application of the hyperaccumulation / superaccumulation plant Jerusalem artichoke in the restoration of cadmium polluted environment. 2. Background technology [0002] In recent years, with the rapid development of industrial and agricultural production, heavy metal pollution in farmland soil has become increasingly serious. The area of ​​cultivated land polluted by heavy metals in my country is nearly 20 million ha 2 , Accounting for about 1 / 5 of the cultivated land area, of which cadmium polluted cultivated land accounts for 11.33 million ha 2 . It is difficult to implement such a large area of ​​contaminated soil using traditional physical and chemical methods due to economic or technical reasons, and it is b...

Claims

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Application Information

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IPC IPC(8): B09C1/00B09C1/10
Inventor 刘兆普隆小华陈良刘玲
Owner NANJING AGRICULTURAL UNIVERSITY
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