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Bioremediation method for soil polluted by heavy metals

A technology for polluted soil and bioremediation, applied in the field of environmental pollution control, to achieve the effects of considerable enrichment, strong reproductive ability and fast growth rate

Active Publication Date: 2013-06-05
浙江博世华环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the combined restoration of plants and microorganisms or animal restoration is more widely used, while the joint restoration of animals, plants and microorganisms is less

Method used

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  • Bioremediation method for soil polluted by heavy metals
  • Bioremediation method for soil polluted by heavy metals
  • Bioremediation method for soil polluted by heavy metals

Examples

Experimental program
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Effect test

Embodiment 1

[0048] The test site is located in Taizhou, Zhejiang Province, where electronic waste has been piled up for a long time. The thickness of the soil layer in this plot is 10-25cm, and it is mainly polluted by cadmium, copper and lead.

[0049] According to the principle of uniformity and operability, the plot is divided into 10m×10m sample plots, and each sample plot is used as a unit to collect points to achieve the typicality of the data.

[0050] Taking one sample plot as a unit, 5 points were selected for each sample plot, and quincunx point distribution method was adopted, and 4 points were selected radially around the selected center point. Use a soil sampler to collect soil (0-20cm) at each point, then mix the soil at 5 points evenly, pick out stones, plant residues and other debris, and put them into numbered plastic bags as a soil sample . Take the soil sample back and air-dry it, crush the soil block, take an appropriate amount and pass it through a 100-mesh sieve for...

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Abstract

The invention discloses a bioremediation method for soil polluted by heavy metals. The bioremediation method comprises the following steps of: adding earthworm feeds into the soil polluted by the heavy metals, turning the soil, uniformly mixing, and putting earthworms into the soil and cultivating the earthworms; after the earthworms are cultivated for 28 to 35 days, collecting earthworm excrements in the upper layer soil, collecting adult earthworms by adopting a natural lighting method, and retaining young earthworms and earthworm eggs in the soil; planting plants by adopting a hedge planting method, cradling the parts of the plants growing for 78 to 90 days, which are positioned above the ground, and removing the whole plants after the plants grow for another 50 to 70 days; collecting the adult earthworms and the earthworm excrements for 1 to 3 days by adopting an outdoor collection method every 28 to 35 days during planting of the plants; and after the whole plants are removed, collecting all the adult earthworms and the young earthworms by adopting the natural lighting method, and collecting the earthworm excrements and the earthworm eggs. The soil is subjected to remediationby combining animals, plants and microorganisms according to a proper remediation sequence and a remediation period, so that the bioremediation method is economic, environment-friendly, easy to operate, high in remediation efficiency and easy to popularize, and is particularly suitable for mild or moderate copper, cadmium and lead combined polluted soils.

Description

technical field [0001] The invention relates to the technical field of environmental pollution control, in particular to a bioremediation method for heavy metal polluted soil. Background technique [0002] With the development of industrial and agricultural production, soil heavy metal pollution is becoming more and more serious, especially the single or combined pollution of copper, cadmium and lead. Soil heavy metal pollution is one of the main problems affecting human health and environmental quality. It not only affects crop production, but also affects the quality of the atmosphere and water environment, and even endangers human health through the food chain. Therefore, the pollution of soil heavy metals copper, cadmium, and lead urgently needs to be treated. [0003] At present, countries all over the world are conducting extensive research on soil heavy metal pollution remediation technology. There are three main ways: ① change the state of heavy metals, reduce their...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09C1/00
Inventor 陈昆柏田伟莉冯猛
Owner 浙江博世华环保科技有限公司
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