Method for restoring soil polluted by heavy metal through synergy of biochar and plants

A technology for phytoremediation and polluted soil, applied in the field of polluted soil treatment, to achieve the effects of low planting difficulty, accelerated bioremediation process, and reduced air pollution

Inactive Publication Date: 2015-12-09
HENAN XINGZHI PATENT SERVICE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] As a new type of environmental functional material, biochar has attracted widespread attention, and it has shown application potential in soil improvement, greenhouse gas emission reduction, and remediation of polluted environments, but there are few reports on the method of synergistic phytoremediation of soil heavy metal pollution

Method used

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  • Method for restoring soil polluted by heavy metal through synergy of biochar and plants

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] 1) Choose H that passes 20% 2 o 2 Disinfection treatment was followed by washing and soaking in distilled water for 12 hours. The annual SGK321 Bt-transgenic cotton seeds with plump and sinking grains grew into healthy seedlings of 30 cm and were buried in the soil surface at a depth of 15 cm along the vertical direction at an inclination of 30 degrees. The plant spacing was 20 cm and the row spacing was 25 cm. Irregular watering and weeding to ensure the normal growth of cotton. In late April, two cycles of annual SGK321 transgenic Bt cotton were continuously planted in the experimental field, and biochar-based fertilizers were applied to the soil at the same time as cotton planting. After the cotton fruit is picked in the cotton mature season, the cotton plant is removed as a whole;

[0035] 2) After the cotton plants in step 1) are removed as a whole, in the middle and early March, choose healthy and strong 1.5m white willow saplings and plant 3 cycles of willows c...

Embodiment 2

[0040] 1) Choose H that passes 20% 2 o 2 Disinfection treatment and then washing and soaking in distilled water for 12 hours. The TM-1 upland cotton seeds with plump and sinking 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 cotton. In late April, two cycles of annual TM-1 upland cotton were continuously planted in the test field, and biochar-based fertilizers were applied to the soil at the same time as cotton planting. The cycle from cotton planting to cotton picking was regarded as a cycle. After the cotton fruit is picked in the cotton mature season, the cotton plant is removed as a whole;

[0041] 2) After the cotton plants are removed as a whole in step 1), in the middle and early March, healthy and strong 2m dry willow saplings are selecte...

Embodiment 3

[0046] 1) Choose H that passes 20% 2 o 2 Disinfection treatment and then washing and soaking in distilled water for 12 hours. The TM-1 upland cotton seeds with plump and sinking seeds grow into healthy seedlings of 30 cm and are planted at a depth of 10 cm in the soil surface at an inclination of 30 degrees in the vertical direction, with a plant spacing of 25 cm and a row spacing of 25 cm. Irregular watering and weeding to ensure the normal growth of cotton. In late April, two cycles of TM-1 upland cotton were continuously planted in the test field, and biochar-based fertilizers were applied to the soil at the same time as the cotton was planted. The cycle from planting cotton to cotton picking was regarded as a cycle. After the cotton fruit is picked in the mature season, the cotton plant is removed as a whole;

[0047] 2) After the cotton plants in step 1) are removed as a whole, in the middle and early March, choose healthy and strong 1.5m white willow saplings and plant...

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Abstract

The invention provides a method for restoring soil polluted by heavy metal through the synergy of biochar and plants. Cotton is continuously planted in the soil polluted by the heavy metal, biological carbon base fertilizer is applied into the soil while the cotton is planted, and cotton plants are overall removed after picking of the cotton is completed; willows are continuously planted after the cotton plants are overall removed, the biological carbon base fertilizer is applied into the soil while the willows are planted in each period, and the willows are overall removed after one period is completed; and the steps are executed circularly and repeatedly until the content of the heavy metal in the soil is up to the safety standard. According to the method, the soil remediation effect is good, and the environment is beautified when the soil polluted by the heavy metal is remedied; the method is high in practicability.

Description

technical field [0001] The invention relates to the field of contaminated soil treatment, in particular to a method for biochar and phytoremediation of heavy metal polluted soil. Background technique [0002] There are physical, chemical and biological methods commonly used in the treatment of heavy metal pollution. Physical methods are expensive, and chemical methods affect the physical and chemical properties of soil, which cannot fundamentally solve the problem. Therefore, many scholars choose biological methods to treat heavy metal-contaminated soil. In the biological method, microbial remediation is greatly affected by the environment and is selective for remediating pollutants, while the heavy metals absorbed by animal remediation may be released into the soil again to cause secondary pollution. Hotspot, and the most reported one is phytoremediation technology. [0003] Phytoremediation technology refers to the remediation technology that uses plants and their rhizosp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/00
Inventor 马新攀
Owner HENAN XINGZHI PATENT SERVICE CO LTD
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