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Method for repairing heavy-metal cadmium polluted soil by using bougainvillea speetabilis plants

A cadmium-contaminated soil and phytoremediation technology, which is applied in the field of remediation of heavy metal-contaminated soil by bougainvillea flowers and plants, can solve the problems of unsuitable heavy metal plant stabilization technology, short growth cycle, and increased cost to deal with harmful plant parts, so as to beautify the environment , strong operability and low cost

Inactive Publication Date: 2015-08-26
NANKAI UNIV
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Problems solved by technology

However, the research on flower phytoremediation of heavy metal-contaminated soil is mainly concentrated on hyperaccumulator plants, which have a short growth cycle and need to increase the cost of processing harmful plant parts above the ground. They are not suitable as pioneer species for plant stabilization technology for heavy metals in abandoned mining areas.

Method used

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  • Method for repairing heavy-metal cadmium polluted soil by using bougainvillea speetabilis plants

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Embodiment Construction

[0024] Pot concentration gradient experiment:

[0025] The potting experiment site is in the greenhouse of TEDA College, Nankai University. The site is located in the Tianjin Economic Development Zone. There is no pollution source around the experimental site. It is an area not polluted by heavy metals. It belongs to the warm temperate semi-humid continental monsoon climate. The average precipitation is between 360-970 mm. The potting test soil was collected from the surface soil of Tanggu Forest Park.

[0026] In this experiment, a total of 3 treatments were set up, respectively, no Cd(CK) was added to the control group, and the concentration of Cd: 50mg·kg -1 (T1), 100mg·kg -1 (T2). The form of Cd added in the experiment is CdCl 2 2.5H 2 O, reagents of analytical grade. Take a certain amount of soil, air-dry it and pass it through a 4mm sieve, and then put it into flower pots of the same model. The amount of soil in each pot is the same, and the CdCl 2 2.5H 2 Mix the...

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Abstract

The invention discloses a method for repairing heavy-metal cadmium polluted soil by using bougainvillea speetabilis plants and relates to a plant stable biological repairing technology for managing the polluted environment. According to the method, bougainvillea speetabilis is mainly planted in a heavy-metal polluted environment, mainly soil; the bougainvillea speetabilis can normally grow and has no any poisoning phenomenon, and a biomass is not reduced; heavy metal is mainly enriched at roots of the plants and the transfer coefficients in the plants are relatively low; and the bougainvillea speetabilis has the characteristics of plants which can be used in the plant stable repairing technology. When the plants are used for repairing the polluted soil, the polluted soil and underground water are managed, and the environment is beautified.

Description

technical field [0001] The invention relates to an ecological restoration technology of polluted environment, in particular to a method for repairing heavy metal polluted soil by using bougainvillea flowers and plants. Background technique [0002] With the rapid development of my country's industrial and agricultural production and the continuous improvement of urbanization level, soil environmental pollution is becoming more and more serious. According to various data, heavy metals have become the chief culprit of soil environmental pollution. Because soil heavy metal pollution has the characteristics of multiple sources, concealment, accumulation, irreversibility, and the severity of pollution consequences, soil heavy metal pollution has been compared to a "chemical time bomb" by environmental academics. There are many sources of heavy metals in soil, and mining activities are the main source of heavy metals in the environment. There are many metal mining areas in my co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/00
Inventor 王文静刘家女
Owner NANKAI UNIV
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