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A method for removing heavy metals in water by using mangrove seedlings

A heavy metal and water removal technology, which is applied in chemical instruments and methods, water pollutants, biological water/sewage treatment, etc., can solve the problems of plant cell ultrastructural damage, limited physiological and biochemical functions, cell apoptosis, etc., to achieve Improve viability and heavy metal absorption capacity, significant removal effect, no secondary pollution effect

Inactive Publication Date: 2017-03-01
GUANGXI ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, when the accumulation of heavy metals in plants exceeds a certain concentration, it will cause damage to the ultrastructure of plant cells, resulting in the limitation or even loss of the physiological and biochemical functions of these organelles, and eventually leading to cell apoptosis.

Method used

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  • A method for removing heavy metals in water by using mangrove seedlings
  • A method for removing heavy metals in water by using mangrove seedlings

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A method utilizing mangrove seedlings to remove heavy metals in water, comprising the following steps:

[0020] a. Cultivation sand base pretreatment: wash the river sand with tap water and put it into a plastic square box. The height of the sand base is 20cm-25cm. Then pour the improved Hoagland's nutrient solution into the sand base, and the height of the nutrient solution is about 3cm-5cm lower than the sand base. Prepare 7 sand bases for the same cultivation, and number them respectively.

[0021] b. Mangrove seedling breeding: collect hypocotyls with strong vitality, no pests and diseases and similar quality and size from the mangrove nature reserve, and then neatly insert the mangrove hypocotyls into the culture sand base prepared in step a. The number of selective breeding meets the needs of the subsequent steps.

[0022] c. Cultivation of mangrove seedlings: add CaCl to the culture sand base in step b to improve Hoagland's nutrient solution 2 solution, so tha...

Embodiment 2

[0028] The steps are basically the same as in Example 1, except that the CaCl 2 replaced by Ca(NO 3 ) 2 . The heavy metal absorption is shown in Table 2.

[0029] Table 2. Ca(NO 3 ) 2 Ca 2+ Absorption of heavy metal ions at different concentrations

[0030]

Embodiment 3

[0032] The steps are basically the same as in Example 1, except that Ca in step c 2+ The concentration is 500mg / L, Cu in step d 2+ , Pb 2+ , Zn 2+ 、Cd 2+The concentrations of heavy metal ions were 25mg / L, 25mg / L, 25mg / L, and 2.5mg / L. The mangrove seedlings began to wither on the 7th day of cultivation, and the leaves began to fall on the 9th day, and then further withered to death.

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Abstract

The invention discloses a method for removing heavy metals from water by utilizing mangrove seedlings. The method is characterized in that healthy mangrove hypocotyls are collected in a mangrove forest conservation area and are put into sand base containing improved Hoagland's nutrient solutions to be cultured; a CaCl2 or Ca(NO3)2 solution with a certain concentration is added in a culturing process; absorption removal on heavy metal ions such as Cu<2+>, Pb<2+>, Zn<2+>, Cd<2+> and the like in the water can be carried out under the condition of appropriate temperature and pH after the mangrove seedlings are cultured. The method has the advantages that the relatively high removal efficiency on the heavy metals can be achieved under the condition of guaranteeing the survival of the mangrove seedlings, and secondary pollution is avoided; and moreover, the method has a good biological benefit and is wide in development prospect.

Description

technical field [0001] The invention relates to a method for removing heavy metals by using aquatic plants, in particular to a method for removing heavy metals in water by using mangrove seedlings. Background technique [0002] In recent years, with the construction and commissioning of heavy industries near the sea, a large amount of pollutants discharged have gathered in estuaries and bay areas, making the heavy metal pollution in my country's coastal waters increasingly serious. . Heavy metal pollution will lead to serious accumulation of heavy metals in organisms. The accumulation of Cu, Pb, Cd and Hg in crustaceans is serious. The content of Cd and Pb is equal to or exceeds the standard value for human consumption, and Cd in mollusk organisms exceeds the standard value for human consumption. These heavy metal pollutants can be continuously enriched in organisms through the food chain, which is extremely harmful to organisms and human health. [0003] Most of the tradit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/32C02F101/20
Inventor 柯珂王一兵
Owner GUANGXI ACAD OF SCI