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APP combined remediation method for cultivated land heavy metal pollution remediation

A pollution remediation and heavy metal technology, applied in the restoration of polluted soil, etc., can solve the problems of limited enrichment of heavy metals, nutrient loss, high repair costs, etc., achieve mobility and reduce bioavailability, increase variable load Electric charge, the effect of reducing the degree of cadmium pollution

Active Publication Date: 2017-05-31
环保桥(湖南)生态环境工程股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After planting heavy metal hyperaccumulator plants on arable land, crops can no longer be planted or can only be intercropped with hyperaccumulator plants, and intercropping crops are mostly energy plants rather than edible crops, and hyperaccumulator plants have limited accumulation of heavy metals, requiring Cyclic planting and harvesting takes a long time to repair, which affects or directly changes the functional attribute of farmland agricultural product production, which does not meet actual production needs
[0010] 2. Take engineering measures such as foreign soil, soil replacement, and topsoil removal to transfer the contaminated soil, and use clean soil to backfill. This restoration measure requires a large amount of work and high restoration costs
[0011] 3. The soil structure and composition of cultivated land are destroyed
When soil leaching and other technologies are used, heavy metals in the soil can be transferred to the liquid phase for separation through chelation, activation, etc., but while separating heavy metals, other nutrients and organic matter in the soil will also be separated at the same time, resulting in The structure of the soil is destroyed, the microbial community is littered, nutrients are lost, and it can no longer be used as arable soil

Method used

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  • APP combined remediation method for cultivated land heavy metal pollution remediation
  • APP combined remediation method for cultivated land heavy metal pollution remediation
  • APP combined remediation method for cultivated land heavy metal pollution remediation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] Embodiment 1: the preparation of soil conditioner

[0058] Select the raw materials, weigh them according to the ratio in Table 1, carry out physical mixing, crush them into particles with an equivalent diameter of 2-4 cm, and transport them to the drying furnace through a conveyor belt for 280 ° C hot air blowing and drying. After drying, they enter the vertical After grinding, the powder is sieved. If the powder diameter is greater than 0.5mm and cannot be sieved, return to the vertical mill to continue grinding. After sieving, stir again to disperse evenly. After cooling, it will be tested in real time. After passing the test, it will be packaged to obtain a soil conditioner sample. S1.

Embodiment 2

[0059] Embodiment 2: the preparation of soil conditioner

[0060] After the limestone is calcined and cooled at 900°C-1200°C, it is physically mixed with other raw materials according to the ratio in Table 1, crushed into particles with an equivalent diameter of 2-4 cm by a crusher, and transported to a drying furnace by a conveyor belt for 280°C. ℃ hot air blowing and drying, after the drying is completed, enter the vertical mill, the powder is sieved, and the powder whose diameter is greater than 0.5mm cannot be sieved and then returns to the vertical mill to continue grinding. , and encapsulated after passing the test to obtain soil conditioner sample S2.

Embodiment 3

[0061] Embodiment 3: the preparation of soil conditioner

[0062] The selected raw materials were weighed according to the ratio of Example 3 in the table, and prepared according to the method of Example 1 to obtain soil conditioner sample S3.

[0063] Table 1 soil conditioner raw material formula list

[0064]

[0065]

[0066] The performance index of the soil conditioner sample S1-S3 prepared by the embodiment 1-3 of table 2

[0067] S1 S2 S3 CaO(%) 33.2 31.8 32.4 SiO 2 (%)

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Abstract

The invention relates to the field of soil heavy metal pollution remediation and specifically discloses an APP combined remediation method for cultivated land heavy metal pollution remediation. According to the APP combined remediation method, the chemical technology and the engineering technology are combined, and the operable and propagable APP combined remediation method comprising a soil conditioner (Amendment), power of hydrogen adjustment (pH) and deep ploughing (Plough) is formed. Through the combined remediation method, on the premise that the soil conditioner product which uses natural mineral raw materials and is efficient in remediation, low in cost and free of secondary pollution to the environment is provided, the nature of crops planted in cultivated land is not changed, heavy metals in the soil are passivated and stabilized, absorption of the crops to the heavy metals is suppressed and hindered, enrichment of the heavy metals in the crops is reduced, meanwhile, medium elements such as calcium and silicon are provided for growth of the crops, and safety production of agricultural products is achieved.

Description

technical field [0001] The invention relates to the field of remediation of heavy metal pollution in arable land, and specifically discloses an APP combined remediation method for remediation of heavy metal pollution in arable land, including three measures: application of soil conditioner, application of pH regulator and deep plowing. Raw materials, soil conditioner products with high restoration efficiency, low cost, and no secondary pollution to the environment. Background technique [0002] At present, soil heavy metal pollution has become a major environmental problem at home and abroad. Among heavy metals, mercury, cadmium, lead, arsenic, and chromium are the most harmful to human health and are often called "five poisonous elements". Cultivated land soil is the basis of crop production. Heavy metals enter the cultivated land soil along with mining, sewage irrigation, fertilization, and pesticide use, and the quality of cultivated land soil deteriorates. According to...

Claims

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Application Information

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IPC IPC(8): B09C1/08
CPCB09C1/08
Inventor 袁海伟熊琪唐守寅
Owner 环保桥(湖南)生态环境工程股份有限公司
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