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Method for remedying Cd contaminated water and wetland with aster subulatus

A cadmium pollution, aster technology, applied in water pollutants, polluted waterways/lakes/ponds/rivers treatment, chemical instruments and methods, etc., can solve problems such as cadmium-polluted water bodies and wetlands that have not yet been rehabilitated by asters. Achieve the effects of strong wind diffusion ability, rapid growth, and restoration of Cd content

Pending Publication Date: 2019-03-15
AGRI PROD QUALITY SAFETY & DETECTION TECH RES INST GUANGXI ZHUANG AUTONOMOUS REGION ACADEMY OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, plants that can be used to repair heavy metal Cd pollution in water mainly include Hydra verticillium, Erythrina chinensis, Trichosanthes, Calamus, Calamus, Phragmites, Hornwort, Elodea, etc. Report on remediation of cadmium polluted water bodies and wetlands

Method used

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  • Method for remedying Cd contaminated water and wetland with aster subulatus
  • Method for remedying Cd contaminated water and wetland with aster subulatus

Examples

Experimental program
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Effect test

Embodiment 1

[0023] The experiment was carried out in the net room greenhouse in the core area of ​​scientific research and experiment of Guangxi Academy of Agricultural Sciences.

[0024] Sow the selected Asteria diaphylla seeds in the sand layer of the plastic seedling raising frame, add ultra-pure water to keep the sand layer moist, and after the seeds germinate, add water containing a small amount of compound fertilizer for their growth and development.

[0025] Choose the same size Asteria asterum seedlings, wash the root with ultrapure water, transplant in fine sand plastic buckets that have been cleaned, the thickness of sand in each bucket is 10cm, and 3 Asteria asteraceae seedlings in each bucket, use nutrient solution (nutrient solution) Its preparation and use methods are consistent with the following references, references: Wang Tianshun, Chen Wei, Yang Yuxia, Liao Jie, Jiang Cuiwen, Jiang Wenyan, Mo Leixing. The effect of silicon on the growth of fruit cane seedlings and cadmiu...

Embodiment 2

[0031] In late June 2017, by direct transplanting, Aster subulatus Michx. was planted in the wetland near the sewage outlet polluted by heavy metal Cd under natural conditions. The transplanted Aster subulatus Michx. The height is 7-10cm, the distance between plants and rows is 25cm×25cm, and ternary compound fertilizer is applied for its growth and development; after 75 days, the aboveground part of the plant is harvested, and the stubble is 3-5cm, and the heavy metal Cd content in the aboveground part is measured to be 76.2mg / kg. Centralized ashing treatment is carried out on the Aster asterum baculum harvested from the wetland, and then the ashes are safely landfilled or used as raw materials for Cd extraction.

Embodiment 3

[0033] In early April 2018, live broadcasting was adopted. Under natural conditions, Aster subulatus Michx. was planted in the wetland near the sewage outlet polluted by heavy metal Cd. The row spacing of live broadcasting was 20 cm × 30 cm. Apply decomposed manure for its growth and development; harvest the aerial part of the plant after 4 months, leave 3-5cm stubble, and measure the heavy metal Cd content in the aerial part to be 71.9mg / kg. Centralized ashing treatment is carried out on the Aster asterum baculum harvested from the wetland, and then the ashes are safely landfilled or used as raw materials for Cd extraction.

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Abstract

The invention belongs to the field of water and wetland contamination remediation and particularly provides a method for remedying Cd contaminated water and wetland with aster subulatus. The method comprises the following steps: (1) fixing aster subulatus seedlings to a Cd contaminated water surface with an ecological floating plate or directly transplanting the aster subulatus seedlings to a Cd contaminated wetland, or directly sowing aster subulatus seeds to the Cd contaminated wetland; applying fertilizer to the seedlings for growth and development of the seedlings; (2) harvesting overground parts after vigorous growth period of the aster subulatus, and moving the harvested aster subulatus out for centralized treatment; (3) repeating step (2) until the growth season of the aster subulatus is ended, and uprooting the aster subulatus for centralized treatment. Content of Cd in the contaminated water or wetland can be reduced effectively, so that the purpose of remedying the contaminated water or wetland is achieved, and the method is simple to operate, low in cost and suitable for large-area popularization and application.

Description

【Technical field】 [0001] The invention relates to the field of water body and wetland pollution restoration, in particular to a method for repairing cadmium-polluted water bodies and wetlands by using the aster aster. 【Background technique】 [0002] With the rapid development of global industrial and agricultural production and economy, the problem of water pollution is becoming more and more serious. A large number of studies have found that heavy metal pollution in water has become a common phenomenon in our country. Heavy metal pollution accounts for a considerable proportion of water pollution, and heavy metals are highly toxic and easy to accumulate and expand in the biological chain. Therefore, the problem of heavy metal pollution in water has seriously endangered the ecological environment and human life and health. Heavy metal pollution in the environment mainly comes from industrial and agricultural production activities, such as mining and smelting of metal ore, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/32C02F101/20
CPCC02F3/32C02F2101/20C02F2103/007
Inventor 王天顺陈伟杨玉霞李晓妤莫磊兴廖洁蒋文艳王海军肖艳妮
Owner AGRI PROD QUALITY SAFETY & DETECTION TECH RES INST GUANGXI ZHUANG AUTONOMOUS REGION ACADEMY OF AGRI SCI
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