Restoration method for industrial waste land soil heavy metal contamination

A remediation method and heavy metal technology, applied in the field of polluted soil treatment, can solve the problems of slow growth, low biomass, and limit the application of phytoremediation technology, and achieve the effects of promoting growth, increasing the concentration of heavy metals, improving soil degradation and reducing productivity

Active Publication Date: 2015-12-23
福建沃土环保集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, phytoremediation also has certain defects, such as: heavy metal-enriched plants usually have low biomass and slow growth; they are selective to metals and are not suitable for the treatment of multiple heavy metal pollution; the absorption capacity of plants to heavy metals is often affected by the soil environment. and climatic conditions; in addition, pollutants may return to the soil through fallen leaves
These all limit the application of phytoremediation technology in the treatment of heavy metal contaminated soil.

Method used

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  • Restoration method for industrial waste land soil heavy metal contamination

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] 1) Apply biochar-based fertilizer and microbial compound bacterial agent to the soil polluted by heavy metals, mix evenly, and age and repair for 60 days;

[0037] 2) After the aging and restoration of the biochar-based fertilizer and microbial compound bacterial agent in step 1), in the middle and early March, choose healthy and strong 1.5m white willow saplings to plant willows for 2 consecutive cycles, and willows willows will be planted after each cycle Overall removal, with a cycle of 12 months;

[0038] 3) After the white bark willow plant in step 2) is removed as a whole, apply biochar-based fertilizer and microbial compound bacterial agent to the soil where willows have been planted again, mix well, and age for 60 days;

[0039] 4) After the aging of the biochar-based fertilizer in step 3), plant the annual Tongbi No. 5 castor, and select 20% H 2 o 2 Disinfection treatment, then washing and soaking in distilled water for 2 hours, the annual castor bean seedlin...

Embodiment 2

[0045] 1) Apply biochar-based fertilizer and microbial compound bacterial agent to the soil polluted by heavy metals, mix evenly, and age and repair for 60 days;

[0046] 2) After the biochar-based fertilizer and microbial compound bacterial agent aging repair in step 1), in the middle and early March, choose healthy and strong 1.5m willow saplings to plant willows for 2 consecutive cycles, and willows willows will be planted after each cycle Overall removal, with a cycle of 12 months;

[0047] 3) After removing the entire willow plant in step 2), apply biochar-based fertilizer and microbial compound bacterial agent to the soil where willows have been planted, mix well, and age for 60 days;

[0048] 4) After the aging of the biochar-based fertilizer in step 3), plant the annual No. 4 castor oil castor, and select 20% H 2 o 2 Disinfection treatment, then washing and soaking in distilled water for 2 hours, the full-grained and sinking annual castor oil No. 4 castor seeds grow ...

Embodiment 3

[0054] 1) Apply biochar-based fertilizer and microbial compound bacterial agent to the soil polluted by heavy metals, mix evenly, and age and repair for 60 days;

[0055] 2) After the biochar-based fertilizer and microbial compound bacterial agent in step 1) have been aged and repaired, in the middle and early March, choose healthy and strong 2m willow saplings to plant willows for 2 consecutive cycles, and after each cycle the whole willow will be planted. Removal, with a cycle of 12 months;

[0056] 3) After removing the entire willow plant in step 2), apply biochar-based fertilizer and microbial compound bacterial agent to the soil where willows have been planted, mix well, and age for 60 days;

[0057] 4) After the aging of the biochar-based fertilizer and microbial compound bacterial agent in step 3), plant the annual No. 5 castor oil, and select 20% H 2 o 2 Disinfection treatment, then washing and soaking in distilled water for 1 hour, the full-grained and sinking annu...

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Abstract

The invention provides a restoration method for industrial waste land soil heavy metal contamination. Charcoal base fertilizer and a microorganism complex microbial inoculant are applied to heavy metal contaminated soil, and the charcoal base fertilizer, the microorganism complex microbial inoculant and the soil are evenly mixed and then aged; after ageing is over, a willow is planted, and the willow is overall removed after a certain period; after the willow is overall removed, charcoal base fertilizer and a microorganism complex microbial inoculant are applied to the soil where the willow is planted again, and the charcoal base fertilizer, the microorganism complex microbial inoculant and the soil are evenly mixed and aged; after ageing restoration is over, ricinus communis is planted, and the ricinus communis is overall removed after ricinus communis fruits are harvested; and the steps are executed cyclically and repeatedly until the content of heavy metal in the soil reaches the safety standard. The restoration 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 method for remediating heavy metal pollution in industrial wasteland soil. Background technique [0002] Industry is the main factor for the development of modern cities. Large-scale industrial construction drives the development of the city, giving the city vitality, making the city develop, grow, and full of vitality, but at the same time it also brings various problems to the city. In the process of industrial production Heavy metals are continuously released into the environment and accumulated in the soil, which has brought serious pollution to the soil on which human beings depend. The long-term pollution of the soil by wastewater and waste has changed the acidity and alkalinity of the soil and the structure of the soil system. A large amount of heavy metals are not easy to decompose, transform or enrich after entering the soil. Poor soil acidity and alkalinity ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/10B09C1/00
CPCB09C1/00B09C1/105
Inventor 马新攀
Owner 福建沃土环保集团有限公司
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