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Method for remediating cadmium-contaminated soil by using Sweden energy willow No.2

A technology for cadmium-contaminated soil and energy, which is applied in the field of remediation of cadmium-contaminated soil by using Swedish Energy Liu No. 2, which can solve problems such as transpiration rate, differences in root active cadmium absorption and transportation, and achieve beautiful tree shape, beautify the environment, and large annual productivity. Effect

Inactive Publication Date: 2012-08-29
NORTHWEST A & F UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At the same time, differences in plant transpiration rate, root activity, root environment and root exudates also lead to differences in plant absorption and transportation of cadmium.

Method used

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  • Method for remediating cadmium-contaminated soil by using Sweden energy willow No.2
  • Method for remediating cadmium-contaminated soil by using Sweden energy willow No.2
  • Method for remediating cadmium-contaminated soil by using Sweden energy willow No.2

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Embodiment 1

[0029] The method for remediating cadmium-contaminated soil by using Swedish energy Liu No. 2 comprises the following steps:

[0030] 1) In spring, select 1-year-old branches of Swedish Energy Willow No. 2 Salix dascladus with a diameter of 1.5 to 2.0 cm, cut them into lengths of 18 to 20 cm as cuttings, and then bury the cuttings in sand and keep them away from light. 70%, the burial depth is 4-5cm, and the storage temperature is 4-6°C. The storage time is determined by the time of cutting cuttings and field cutting time. Generally, the sand storage time is not more than 60 days;

[0031] Or cut the cuttings immediately after cutting, but make sure that the cuttings do not lose water.

[0032] 2) Carry out cuttings in March to April, take out the cuttings before cutting, cut the lower part into a horse-eared inclined plane with a length of 3-5cm and an inclination of 40-45°, and then put the lower part of the cuttings at a concentration of 100-150ppm. -In the GGR rooting pow...

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Abstract

The invention discloses a method for remediating cadmium-contaminated soil by using Sweden energy willow No.2, which comprises: cutting one-year-old twigs with a diameter between 1.5 to 2.0 centimeters of Sweden energy willow Salix dascladus by 18 to 20 centimeters, and storing the twigs cut off as cuttingwood in a sand bed; and taking the cuttingwood out before sticking, immersing the cuttingwood in solution of GGR rooting powder, and sticking at a 0.5 to 0.75 meter plant distance and 0.5 to 1 meter row distance, wherein the cuttingwood is inserted into the cadmium-contaminated soil with 3 to 5 centimeters exposed from the ground in sticking, and 3 to 5 years is a growth period. In a cadmium-stressed environment, the Sweden energy willow No.2 growth vigorously, the biomass liveweight can reach 7.4 to 10.9t / hm<2> / year, the soil purification rate can reach 0.3 to 1.2 percent / year, and the annual purification rate is 4 to 7 times that of hyper-herbaceous accumulators.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and relates to a method for repairing cadmium-contaminated soil by using Swedish energy willow No. 2 (Salixdascladus). Background technique [0002] With the rapid growth of the global population, the continuous expansion of industrial production scale and the rapid development of urbanization, soil heavy metal pollution is becoming more and more serious. According to statistics, in 1980, the area of ​​cultivated land polluted by the three industrial wastes in my country was 2.667 million hm 2 , increased to 6.667 million hm in 1988 2 , increased to 10 million hm in 1992 2 . At present, the area of ​​arable land that suffers from different degrees of pollution in the country is close to 20 million hm 2 , accounting for about 1 / 5 of the cultivated land area. my country's annual grain production reduction due to heavy metal pollution exceeds 10 million tons, and the amount of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09C1/00
Inventor 张文辉马闯薛建永
Owner NORTHWEST A & F UNIV
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