Method for evaluating restoration effect of polluted sediment used for limnodrilus hoffmeisteri

A technology for polluting sediment and waterworms, which is applied in the direction of material inspection products, measuring devices, instruments, etc., can solve problems such as the inability to characterize the restoration effect of sediments, and achieve the effect of easy collection and low cost

Inactive Publication Date: 2018-08-14
北京中科乾和环保科技服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are many types of pollutants, and it is impossible to characterize the effect of sediment remediation by removing a single pollutant

Method used

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  • Method for evaluating restoration effect of polluted sediment used for limnodrilus hoffmeisteri
  • Method for evaluating restoration effect of polluted sediment used for limnodrilus hoffmeisteri
  • Method for evaluating restoration effect of polluted sediment used for limnodrilus hoffmeisteri

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Take 20g of sediment from a heavily polluted section of a river, put it into a glass container, add 100ml of tap water after 24 hours of aeration, mix the sediment and water for 2 days, add repair materials for another 5 days. Restoration materials are added in an amount of 0-15% of the dry weight of the sediment.

[0053] Waterworms can be isolated from natural water sediments. After separation, they should be cultivated in the laboratory for more than 30 days, and then suitable waterworms should be selected for testing. The weight of selected waterworms is 8 ± 1 mg; the length is 3-5 cm.

[0054] Waterworms were added to culture for 28 days, and then the sediments of waterworms were separated with an 80-mesh sieve. Cultivate at room temperature; no feeding and water changes are performed during the cultivation process. The biomass change was determined by the total mass of water silk worms before and after cultivation.

Embodiment 2

[0056] Different from Example 1, the restoration effect index is the survival rate, and the survival rate is determined by the number of waterworms before and after cultivation.

Embodiment 3

[0058] Different from Example 1, the restoration effect index is the reproduction rate, and the reproduction rate is determined by the ratio of the number of waterworm larvae after the cultivation to the initial dosage of waterworm.

[0059] In the above-mentioned embodiment 1, after adding exogenous repair materials, the biomass change rate of water silk worms showed negative growth before no repair materials were added, and when the amount of repair materials added exceeded 3%, the change rate of water silkworm biomass increased. With the addition of restoration materials, the growth environment of waterworms was improved, and the growth rate of waterworms was significantly increased.

[0060] In the second embodiment above, after adding exogenous repairing materials, the survival rate of waterworms was as low as 11% before no repairing materials were added. When the amount of repairing materials added exceeded 10%, the survival rate of waterworms was over 90%. With the additi...

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Abstract

The invention discloses a method for evaluating restoration effect of polluted sediment used for limnodrilus hoffmeisteri. The method comprises the following steps: S1) pre-culturing deposit sediment,adding a restoration material, and performing simulated restoration; S2) separating the limnodrilus hoffmeisteri in the natural deposit sediment, and performing laboratory culture and adding the material in the repaired deposit sediment; and S3) after culture for 28 days, screening the limnodrilus hoffmeisteri to obtain the survival limnodrilus hoffmeisteri, wherein feeding and water change are not required during a culture process, and obtaining an effect assessment parameter of the deposit sediment through counting of number of limnodrilus hoffmeisteri, weighing and larva quantity. The method is used for restoration and assessment of the deposit sediment, and can effectively solve the disadvantages of complex operation and over-high cost of the method for evaluating effect of the waterenvironment sediment after restoration.

Description

technical field [0001] The invention relates to the technical field of bioremediation effect evaluation, in particular to a method for evaluating the remediation effect of water worms applied to polluted sediments. Background technique [0002] The sediment of natural water bodies is the source and sink of pollutants. Existing polluted sediments contain many kinds of pollutants. The pollutants can be effectively removed and controlled by adding restoration materials. However, there are many types of pollutants, and it is impossible to characterize the effect of sediment remediation by removing a single pollutant. [0003] As a common benthic organism in the sediment of heavily polluted rivers, waterworm has the advantages of strong survival ability and wide distribution. Its growth rate, survival rate and reproduction rate are affected by the comprehensive toxicity of sediments. Therefore, it is a research direction to evaluate the effect of applying waterworm to sediment r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/50
CPCG01N33/5008G01N33/5085
Inventor 单保庆张超
Owner 北京中科乾和环保科技服务有限公司
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