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Method for improving arsenic absorption efficiency of pteris vittata

A centipede grass and efficient technology, applied in the field of soil remediation, can solve problems such as unsustainable irrigation, land salinization, waste of water resources, etc., and achieve the effects of improving phytoremediation efficiency, huge remediation potential and broad application prospects.

Inactive Publication Date: 2018-10-12
INST OF GEOGRAPHICAL SCI & NATURAL RESOURCE RES CAS
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Problems solved by technology

In the process of field restoration in the field, water management is mainly through natural rainfall or artificial irrigation. In the dry and high temperature season, the rainfall is small and the rainfall is unstable. After 1 to 2 days of natural rainfall, the soil moisture evaporates to below 20%, and the redox of the soil Conditions are still in an aerobic environment, and the activity of arsenic has not increased, which in turn affects the removal efficiency of soil arsenic by centipede grass; artificial irrigation will lead to salinization of the land due to long-term flooding, waste of water resources, and it is difficult to continue irrigation
The results of laboratory studies on improving the arsenic enrichment ability of centipede grass in soil by controlling soil moisture cannot be applied to specific field restoration practices

Method used

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Embodiment Construction

[0030] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below by means of a specific embodiment and with reference to the accompanying drawings. Such as figure 1 Shown, a kind of method of improving the arsenic absorption efficiency of centipede grass of the present invention, its process comprises the following steps successively:

[0031] Step S1: One month before the transplanting of Centipede Grass, 50-150 kg of activator per mu was applied to the arsenic-contaminated soil to be repaired, and the depth of application was 10-20 cm; at the same time, the soil to be repaired was leveled, Loosen the soil to ensure that the activator is evenly mixed with the soil.

[0032] Step S2: Lay water-retaining materials 1-2 weeks after the activator is applied; reserve holes for transplanting Centipede grass seedlings according to a certain row-to-plant distance, and the row-to-pla...

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Abstract

The invention discloses a method for improving the arsenic absorption efficiency of pteris vittata and belongs to the technical field of soil pollution remediation. According to the method, a water-retention material is paved so as to prevent soil moisture from being evaporated; and in combination with a screened activating agent and control measures such as soil moisture control-soil arsenic activation and the like, effective supply environment of soil arsenic during a pteris vittata growth process is optimized, the capability of pteris vittata in enriching soil arsenic is improved, and a newmethod is provided for phytoremediation for arsenic-contaminated soil.

Description

technical field [0001] The invention belongs to the technical field of soil remediation, and in particular relates to a method for improving the arsenic absorption efficiency of centipede grass in arsenic-polluted soil by using a water-retaining material and an activator. Background technique [0002] Arsenic (As) is a chemical element that widely exists in nature. Arsenic and its soluble compounds are highly toxic. The main component of the highly toxic substance arsenic (white arsenic) is As 2 o 3 . Arsenic can enter the human body through inhalation, food, drinking water or skin contact, and is very harmful to humans, animals and plants. Accumulation of arsenic in the soil to a certain extent will lead to soil degradation and a decline in the yield and quality of growing crops. Arsenic entering crops can endanger human health through the food chain. my country is one of the countries with the most serious arsenic pollution in the world, and mass arsenic poisoning and a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/00B09C1/08
CPCB09C1/08B09C1/105B09C2101/00
Inventor 杨军郭劲君杨俊兴陈同斌
Owner INST OF GEOGRAPHICAL SCI & NATURAL RESOURCE RES CAS
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