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Method for recovering acid-heavy metal contaminated soil

A technology of contaminated soil and remediation method, which is applied in the field of remediation of acid-heavy metal contaminated soil, can solve the problems of destroying the permeability of the plasma membrane, crop production reduction, soil compaction, etc., and achieve the elimination of pollutants, short growth cycle, and elimination of soil pollution. Effect

Active Publication Date: 2015-12-23
SHANGHAI JOKOSON ENVIRONMENT ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] When planting crops in acidic soil, due to the acidic soil, the permeability of the protoplasmic membrane in the plant will be destroyed, and the absorption of trace elements such as calcium, magnesium, potassium and other elements by crops will be reduced. At present, the commonly used method is to use lime to improve acidic soil, but the long-term Or a large amount of lime will cause soil compaction, and it will also cause the imbalance of calcium, magnesium, potassium and other elements in the soil, resulting in crop yield reduction

Method used

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  • Method for recovering acid-heavy metal contaminated soil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] 1) Apply the biochar-based fertilizer to acid-heavy metal-polluted soil, mix well, and age for 60 days;

[0039] 2) After the aging of the biochar-based fertilizer in step 1), then select 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. In late March, the annual castor No. 5 castor was continuously planted in the experimental field for one cycle, and the castor bean was harvested as a cycle when the castor fruit was mature, and the castor was removed as a whole after the castor fruit was harvested in each cycle;

[0040] 3) After step 2) Zhongtong Castor No. 5 castor is removed as a whole, it is put into earthworm breeding, and the amount of ea...

Embodiment 2

[0046] 1) Apply biochar-based fertilizer to acidic-heavy metal-polluted soil, mix well, and age for 60 days;

[0047] 2) After the aging of the biochar-based fertilizer in step 1), then select 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. 5 castor seeds grow into healthy seedlings of 30 cm and are buried in the soil surface at a depth of 10 cm along the vertical direction at an inclination of 30 degrees. The plant spacing is 20 cm, and the row spacing is 25 cm. In late March, the annual castor No. 5 castor was continuously planted in the experimental field for one cycle, and the castor bean fruit was matured and harvested as a cycle, and the castor bean was removed as a whole after the castor fruit was harvested in each cycle;

[0048] 3) After the No. 5 castor in the middle oil castor in step 2) is removed as a whole, it is put into earthworm breeding, and the amount of earthwo...

Embodiment 3

[0054] 1) Apply biochar-based fertilizer to acidic-heavy metal-polluted soil, mix well, and age for 60 days;

[0055] 2) After the aging of the biochar-based fertilizer in step 1), then select 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. In late March, the annual castor oil No. 4 castor was continuously planted in the experimental field for one cycle, and the castor bean fruit was ripe and harvested as a cycle, and the castor bean was removed as a whole after the castor fruit was harvested in each cycle;

[0056] 3) After the No. 4 castor in the middle oil castor in step 2) is removed as a whole, it is put into earthworm breeding, and the amount of earthw...

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Abstract

The invention provides a method for recovering acid-heavy metal contaminated soil. The method includes the steps that biological activated carbon base fertilizer is applied to the acid-heavy metal contaminated soil, mixed evenly and aged; after aging is finished, earthworms are placed in the soil to be cultured, and castor oil plants are planted and completely removed after fruits of the castor oil plants are harvested; after the castor oil plants are completely removed, earthworms are placed in the soil to be cultured again; after the earthworms are introduced into the soil normally, willows are planted, and the willows are completely removed after a period of time; the steps mentioned above are cyclically and repeatedly executed till the content of heavy metal in the soil reaches the safety standard. The method for recovering the acid-heavy metal contaminated soil has the extremely remarkable beneficial effects that a restoration period is short and the soil cannot be secondarily contaminated.

Description

technical field [0001] The invention relates to the field of contaminated soil treatment, in particular to a repair method for acidic-heavy metal polluted soil. Background technique [0002] Soil degradation refers to the process of soil quality and productivity decline caused by the irrational use of soil by humans. There are mainly erosion degradation, soil acidification, pollution degradation, fertility degradation and biological degradation. At present, with the increasingly prominent contradictions between population and environmental resources, soil degradation has become a major global problem. As an important aspect of soil degradation, soil acidification accelerates the increase of soil acidity, which will cause the leaching of a large number of nutrients in the soil. The decline in fertility seriously affects the growth of crops. [0003] From a global perspective, acidic soils are mainly distributed in two major regions, one is tropical and subtropical regions, ...

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 SHANGHAI JOKOSON ENVIRONMENT ENG
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