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Soil remediation method

A soil remediation and soil technology, applied in the field of soil remediation, can solve the problems of low extraction rate, long time for phytoremediation, and small biomass of hyperaccumulated plants, so as to improve soil environment, high added value, and reduce the total amount of heavy metals. Effect

Active Publication Date: 2019-03-26
SHENZHEN TECHAND ECOLOGY & ENVIRONMENT CO LTD
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  • Abstract
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Problems solved by technology

In addition, for phytoremediation, there are also disadvantages of relatively small biomass of hyperaccumulator plants and low extraction rate, which will cause longer time for phytoremediation

Method used

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Examples

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Effect test

no. 1 example

[0042] In this example, soil contaminated by a manganese chemical plant was used as the soil to be repaired. The Zn and Mn contents in the soil to be repaired were 4105.11 mg / kg and 27369.42 mg / kg respectively, and the total salt content was as high as 24.09 g / kg. In this example, strelitzia, Hongsenhuai, podocarpus, duying, Sijigui, poinsettia, safflower, michelia, bougainvillea, cotton leaf tung tree, camphor, red rose apple were planted respectively. and tassel trees. Specifically, 3 plants of the same species were planted in a leaky plastic pot with a size of 70.5cm×45cm×17.5cm; 6 pots were planted for each plant, and the soil used in the 6 plastic pots was treated with 2 different treatment methods. One of the soils is made by mixing soil to be repaired with 10V% organic fertilizer, which is recorded as "organic fertilizer"; the other soil is made by mixing soil to be repaired with 10V% organic fertilizer and 3V% conditioner, and is recorded as "organic fertilizer". Fert...

no. 2 example

[0053] In this example, soil contaminated by another manganese chemical plant is used as the soil to be repaired. The Zn and Mn contents in the soil to be repaired are 5997.21 mg / kg and 29503 mg / kg respectively, and the total salt content is as high as 22.49 g / kg. In this example, 6 planting methods were used respectively. The first method used to plant Hongsen Huai alone, which was recorded as "Hongsen Huai"; -Qinghuai"; the third type is interplanted with Hongsenhuai and Southeast Sedum, which is recorded as "Hongsenhuai-Southeast Sedum"; Mori locust tree-Qingdao-Southeast Sedum"; the fifth type is planted with cotton-leaf tung tree alone, which is recorded as "cotton-leaf tung tree"; the sixth type is interplanted with cotton-leaf tung Tong-Qing Li"; each planting method will be implemented in a 2m×3.5m plot, and experiments will be carried out in 3 plots. In this way, 18 plots will be used in the 6 planting methods, and the 18 plots will have uniform sunlight and uniform ...

no. 3 example

[0059] In this example, another manganese plant polluted soil was used as the soil to be repaired, wherein the Zn content and Mn content in the soil to be repaired were 805.4 mg / kg and 6600.5 mg / kg respectively, and the total salt content was 9.82 g / kg. In this embodiment, 6 plots with a size of 2m×3.5m are used. The 6 plots have uniform sunlight and pollution, and the interval between the plots is 1m. Take 20V% organic fertilizer, 1V% conditioning agent and the surface layer 0-20cm of soil to be repaired and fully mix it as the soil of the plot, wherein the conditioning agent is calcium oxide, calcium sulfate, zeolite, vermiculite, humic acid It is mixed with calcium magnesium phosphate fertilizer according to the weight ratio of 7:1:1:1:1:1. After the soil is prepared, water and maintain it for 7 days. Then, transplant the bare-root seedlings of Hongsen Sophora japonica to each plot respectively, and interplant Sedum sedum seedlings and sow the seeds of Sedum japonica among ...

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Abstract

The invention provides a soil remediation method. The soil remediation method comprises the following steps: step S1, plants for soil remediation are selected according to the pollution situation of to-be-remedied soil, the to-be-remedied soil is improved through an improver, then the plants for soil remediation are planted in the improved soil, and when the total salt content of the to-be-remedied soil is greater than 0.5 wt% and the Zn content is greater than 500 mg / kg, or the total salt content of the to-be-remedied soil is greater than 0.5 wt% and the Mn content is greater than 5000 mg / kg,or the total salt content of the to-be-remedied soil is greater than 0.5 wt% and the Zn content is greater than 500 mg / kg and the Mn content is greater than 5000 mg / kg, strelitzia reginae, poinsettia, robinia pseudoacacia, podocarpus macrophyllus, elaeocarpus decipiens, semperflorens, loropetalum chinense var.rubrum, michelia figo, bougainvillea or jatropha gossypifolia are selected to be used asplants for soil remediation; and step 2, the plants for soil remediation are conserved. According to the soil remediation method, the soil environment can be effectively improved, the total amount ofheavy metals in the soil is effectively decreased, and economic benefits are good.

Description

technical field [0001] The invention relates to the field of soil restoration, in particular to a soil restoration method. Background technique [0002] With the development of the national economy and the improvement of people's living environment requirements, ecological restoration has been vigorously developed due to its low cost, green and environmental protection. Ecological restoration is mainly based on phytoremediation, but during restoration, the growth of plants is often affected by the soil environment (such as salt content in the soil, heavy metal content, and soil compaction). Therefore, when planting plants, the soil must be improved, and plants with tolerance must be screened and planted to ensure that the plants can grow. In addition, for phytoremediation, there are also disadvantages such as small biomass of hyperaccumulator plants and low extraction rate, which will cause a long time for phytoremediation. Regarding this issue, the applicant interplanted ...

Claims

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Application Information

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IPC IPC(8): B09C1/00B09C1/08
CPCB09C1/08B09C1/105
Inventor 林晓燕熊云武李诗刚吴启堂周巍梁鹏彭文宇黄雷裴东辉许建新王丽李树李红艳刘延利任国香
Owner SHENZHEN TECHAND ECOLOGY & ENVIRONMENT CO LTD
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