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Combined remediation method for heavy metal contaminated soil

A technology of polluted soil and joint remediation, applied in the field of polluted soil treatment, can solve problems such as difficult decomposition, transformation or enrichment, and difficulty in soil heavy metal pollution treatment, so as to improve soil degradation and productivity decline, improve biodiversity and planting difficulties. low effect

Inactive Publication Date: 2015-12-23
HENAN XINGZHI PATENT SERVICE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the difficulty of decomposing, transforming or enriching heavy metals after entering the soil, and the complexity of the structure of the soil system itself, it is very difficult to control soil heavy metal pollution.

Method used

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  • Combined remediation method for heavy metal contaminated soil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] 1) Apply the biochar-based fertilizer to the soil polluted by heavy metals in the experimental area, mix well, and age for 60 days;

[0037] 2) After the aging of biochar-based fertilizer in step 1), castor is planted, and 20% H 2 o 2 Disinfection treatment and then washing and soaking in distilled water for 12 hours. The annual castor bean seedlings with plump and sinking seeds grow into healthy seedlings of 30 cm in length and buried in the surface of the soil at a depth of 10 cm at an inclination of 30 degrees in the vertical direction. The plant spacing is 20 cm and the row spacing is 25 cm. Irregular watering and weeding to ensure the normal growth of castor. In late March, two cycles of annual castor castor Tongbi No. 5 were continuously planted in the experimental field. After each cycle of castor planting, the microbial compound bacterial agent was inoculated into the soil. After each cycle of castor fruit was harvested, the castor The hemp is removed in its e...

Embodiment 2

[0045] 1) Apply the biochar-based fertilizer to the soil polluted by heavy metals in the experimental area, mix well, and age for 70 days;

[0046] 2) After the aging of biochar-based fertilizer in step 1), castor is planted, and 20% H 2 o 2 Disinfection treatment and then washing and soaking in distilled water for 12 hours, the plump and sinking No. 5 castor oil castor seeds grow into healthy seedlings of 28 cm and are buried in the soil surface at a depth of 15 cm along the vertical direction at an inclination of 30 degrees. The plant spacing is 25 cm, and the row spacing is 20 cm. Irregular watering and weeding to ensure the normal growth of castor. In late March, the annual castor No. 5 castor was continuously planted for 2 cycles in the experimental field. After each cycle of castor planting, the microbial compound bacterial agent was inoculated into the soil. After each cycle of castor fruit was harvested, the The castor bean is removed in its entirety;

[0047] 3) Af...

Embodiment 3

[0054] 1) Apply the biochar-based fertilizer to the soil polluted by heavy metals in the experimental area, mix well, and age for 60 days;

[0055] 2) After the aging of biochar-based fertilizer in step 1), castor is planted, and 20% H 2 o 2 Disinfection treatment, then washing and soaking in distilled water for 12 hours, the full-grained and sinking annual castor oil No. 4 castor seeds grow into healthy seedlings of 30 cm and are buried in the soil surface at a depth of 15 cm along the vertical direction at an inclination of 30 degrees. The plant spacing is 25 cm, and the row spacing is 25 cm. Irregular watering and weeding to ensure the normal growth of castor. In late March, the No. 4 castor oil castor was continuously planted in the experimental field for 2 cycles. After each cycle of castor planting, the microbial compound bacterial agent was inoculated into the soil. After the castor fruit was harvested in each cycle, the castor The hemp is removed in its entirety;

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Abstract

The invention provides a combined remediation method for heavy metal contaminated soil. The method includes the steps that charcoal base fertilizer is applied to the heavy metal contaminated soil, and the charcoal base fertilizer and the soil are evenly mixed and then aged; after ageing is over, ricinus communis is planted, then a microorganism complex microbial inoculant is inoculated into the soil, and the ricinus communis is overall removed after ricinus communis fruits are harvested; after the ricinus communis plant is overall removed, charcoal base fertilizer is applied again into the soil where the ricinus communis is planted, and the charcoal base fertilizer and the soil are evenly mixed and aged; after ageing is over, a willow is planted, a microorganism complex microbial inoculant is inoculated into the soil, and the willow is overall removed after a certain period; and the steps are executed cyclically and repeatedly until the content of heavy metal in the soil reaches the safety standard. The combined remediation method is good in soil governing effect, fast in effect taking, short in time, capable of beautifying the environment while the heavy metal contaminated soil is governed and high in practicability.

Description

technical field [0001] The invention relates to the field of contaminated soil treatment, in particular to a combined restoration method for heavy metal-contaminated soil. Background technique [0002] Nearly one-fifth of China's existing arable land is polluted to varying degrees. Polluted soil will lead to crop yield reduction, and may even cause pollutants in agricultural products to exceed the standard, thereby endangering human health. In addition, with the acceleration of economic development and urbanization, the site pollution caused by industrial and mining enterprises is also very serious. Due to the changes and adjustments in the industrial structure and urban layout, some polluting enterprises such as chemical industry and metallurgy have relocated one after another, and some enterprises have closed down, resulting in continuous generation of polluted sites. Soil is an important material basis for human social production activities and an indispensable natural r...

Claims

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Application Information

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IPC IPC(8): B09C1/10
Inventor 马新攀
Owner HENAN XINGZHI PATENT SERVICE CO LTD
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