Biological remediation method for soil polluted by cadmium, zinc, lead and copper ions

A technology for bioremediation and contaminated soil, which is applied in the field of bioremediation of zinc, cadmium, soil remediation, lead, and copper ion-contaminated soil to achieve the effects of excellent material, excellent pulp performance and high basic density.

Active Publication Date: 2015-01-21
DALIAN DEETOP ENVIRONMENTAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of the current situation that the existing restoration of heavy metal-contaminated soil is slightly insufficient, one of the purposes of the present invention is to provide a bioremediation method for soil contaminated by

Method used

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  • Biological remediation method for soil polluted by cadmium, zinc, lead and copper ions

Examples

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Effect test

Embodiment 1

[0032] Example 1 The bioremediation method of cadmium, zinc, lead, copper ion contaminated soil, the implementation steps are as follows:

[0033] (1) Select the heavy metal-contaminated soil to be repaired, remove weeds and shrubs manually, apply 500Kg of fully decomposed organic agricultural miscellaneous fertilizer per mu in late autumn and early winter, and plow 40cm deep to weather the soil, freeze to death overwintering pests, and plow the land thoroughly with harrows broken;

[0034] (2) When the average temperature reaches above 10°C after soil thawing in spring, transplant woody fast-growing arbor bamboo and willow with the ability to enrich heavy metals, and transplant annual bamboo and willow seedlings in interlaced hole planting with a row spacing of 2.5 meters and a plant spacing of 1.2 meters , digging holes for planting, the hole diameter is 0.5 meters, and the hole depth is 0.4 meters;

[0035] (3) After transplanting, irrigate with water once to make the roo...

Embodiment 2

[0038] Example 2 The bioremediation method of cadmium, zinc, lead, copper ion contaminated soil, the implementation steps are as follows:

[0039] (1) Select heavy metal-contaminated soil to be repaired, remove weeds and shrubs manually, apply 700Kg of fully decomposed organic agricultural miscellaneous fertilizer per mu in late autumn and early winter, and plow 50cm deep to weather the soil, freeze to death overwintering pests, and plow the land thoroughly with harrows broken;

[0040] (2) When the average temperature reaches above 10°C after the soil is thawed in spring, transplant the woody fast-growing arbor bamboo and willow with the ability to enrich heavy metals, and transplant the annual seedlings of bamboo and willow in interlaced hole planting, with a row spacing of 3.5 meters and a plant spacing of 1.8 meters , digging holes for planting, the hole diameter is 0.8 meters, and the hole depth is 0.6 meters;

[0041](3) After the transplanting is completed, irrigate ...

Embodiment 3

[0044] Example 3 The bioremediation method of cadmium, zinc, lead, copper ion contaminated soil, the implementation steps are as follows:

[0045] (1) Select heavy metal-contaminated soil to be repaired, remove weeds and shrubs manually, apply 600Kg of fully decomposed organic agricultural miscellaneous fertilizer per mu in late autumn and early winter, and plow 45cm deep to weather the soil, freeze to death overwintering pests, plow the land thoroughly and harrow broken;

[0046] (2) When the average temperature reaches above 10°C after soil thawing in spring, transplant woody fast-growing arbor bamboo and willow with the ability to enrich heavy metals, and transplant annual bamboo and willow seedlings in interlaced hole planting, with a row spacing of 3 meters and a plant spacing of 1.5 meters , digging holes for planting, the hole diameter is 0.6 meters, and the hole depth is 0.5 meters;

[0047] (3) After the transplanting is completed, irrigate once with water to make ...

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Abstract

The invention provides a biological remediation method for soil polluted by cadmium, zinc, lead and copper ions. The biological remediation method is realized by the following technical scheme comprising the following steps: (1) selecting the soil to be remediated, polluted by heavy metals, manually removing weeds and shrubs, applying enough decomposed organic agricultural foreign fertilizers in the end of autumn and the beginning of winter, deeply ploughing to enable the soil to be weathered, freezing overwintering pests for death, ploughing a land thoroughly and crushing the soil by a rake; (2) after the soil is unfrozen in the spring, when the average temperature reaches more than 10 DEG C, transplanting woody and fast-growing trees, namely bamboo willows with the heavy-metal enriching capability; (3) after the transplanting is finished, when the temperature reaches more than 15 DEG C, implementing the earthworm remediating process, and then collecting earthworms; and (4) after the first-time collection of the earthworms in the earthworm remediating process, planting elsholtzia splendens and alfred stonecrop and then wholly removing the elsholtzia splendens plants and the alfred stonecrop plants with roots, and in the spring next year, reintroducing the earthworms, the elsholtzia splendens and the alfred stonecrop into the land for remediation again, wherein the whole remediation process lasts for 20 months totally.

Description

technical field [0001] The invention relates to a method for soil restoration, in particular to a bioremediation method for soil polluted by cadmium, zinc, lead and copper ions. It belongs to the field of soil pollution control in environmental protection. Background technique [0002] Soil heavy metal pollution refers to the phenomenon that human activities bring heavy metals into the soil, causing the content of heavy metals in the soil to be significantly higher than the background content, and may cause existing or potential soil quality degradation, ecological and environmental deterioration. Heavy metal pollution refers to the excess of heavy metal elements and their compounds with significant biological toxicity such as mercury, cadmium, chromium, lead, and arsenic in the environment, resulting in pollution. Although some elements are essential to life, their health will be seriously affected if they are excessive. There have been many heavy metal pollution incidents...

Claims

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Application Information

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IPC IPC(8): B09C1/00
Inventor 赵连祺
Owner DALIAN DEETOP ENVIRONMENTAL TECH CO LTD
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