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Heavy metal activator and application thereof in soil joint restoration

A technology of heavy metals and activators, applied in the restoration of contaminated soil, application, soil conditioning materials, etc., can solve the problems of high manpower and financial resources, reduced soil fertility, unfavorable promotion and application, etc., to reduce repair costs and accelerate degradation , Improve the effect of soil microbial activity

Inactive Publication Date: 2018-11-16
湖南泰谷生态工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The first four methods are relatively traditional control methods. Although they have achieved certain results in practical applications, they have defects such as large manpower and financial resources, complex implementation, high control costs, and easy reduction of soil fertility, which are not conducive to large-scale promotion. application

Method used

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  • Heavy metal activator and application thereof in soil joint restoration
  • Heavy metal activator and application thereof in soil joint restoration
  • Heavy metal activator and application thereof in soil joint restoration

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Heavy metal activator production method:

[0053] (1) Rice straw is crushed through a 20-mesh sieve, added to 4% NaOH solution at a weight ratio of 1:10, heated at 100°C for 30 minutes, filtered, and the filter residue is taken, washed with water until neutral, and dried at 105°C to obtain delignification straw.

[0054] (2) Add 5% urea of ​​the weight of the delignified straw to the delignified straw, carry out composting and fermentation to maturity, add 2% rapeseed meal of the weight of the delignified straw after fermentation, and add Bacillus with phosphorus-solubilizing function, Rhizopus and Aspergillus make the concentration of the heap bacterium 0.1 billion cfu / g, carry out secondary fermentation for 10 days, and obtain straw bio-organic fertilizer after the end.

[0055] (3) Add 5% oxalic acid by organic fertilizer weight to straw bio-organic fertilizer and mix to prepare heavy metal activator.

Embodiment 2

[0057] Heavy metal activator production method:

[0058] (1) Rice straw is crushed through a 20-mesh sieve, added to 1% NaOH solution at a weight ratio of 1:5, heated at 80°C for 10 minutes, filtered, and the filter residue is taken, washed with water until neutral, and dried at 85°C to obtain delignification straw.

[0059] (2) Add 1% urea of ​​the weight of the delignified straw to the delignified straw, carry out composting and fermentation until decomposed, add 5% rapeseed meal after fermented and decomposed, add Bacillus, Pseudomonas, Erwinia makes the concentration of the heap bacteria 0.05 billion cfu / g, carries out secondary fermentation for 10 days, and obtains straw bio-organic fertilizer after the end.

[0060] (3) Add 1% oxalic acid by weight of organic fertilizer to straw bio-organic fertilizer and mix to prepare heavy metal activator.

Embodiment 3

[0062] Heavy metal activator production method:

[0063] (1) Rice straw is crushed through a 20-mesh sieve, added to 10% NaOH solution at a weight ratio of 1:20, heated at 120°C for 60 minutes, filtered, the filter residue is taken, washed with water until neutral, and dried at 120°C to obtain delignification straw.

[0064] (2) Add urea with 10% weight of delignified straw to the delignified straw, carry out composting and fermentation until decomposed, add rapeseed meal with 5% weight of delignified straw after fermented and decomposed, add nitrogen-fixing bacteria with phosphorus-solubilizing function, Rhizobia, Penicillium, and Aspergillus make the concentration of the heap bacterium 0.1 billion cfu / g, carry out secondary fermentation for 7 days, and obtain straw bio-organic fertilizer after the end.

[0065] (3) Add 10% oxalic acid by weight of organic fertilizer to straw bio-organic fertilizer and mix to prepare heavy metal activator.

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Abstract

The invention provides a heavy metal activator and application thereof in soil joint restoration. The activator preparation comprises the following steps that (1) straws are crushed and sieved, the crushed straws are added into an alkaline solution, a heating reacting is conducted, filtering is conducted after finishing the heating reaction, the filtration residue is taken and washed with water, washing is repeated until the eluent is neutral, and drying is conducted to obtain the lignin-removed straws; (2) urea is added into the lignin-removed straws, composting fermentation is conducted, rapeseed meal is added after the fermentation is thoroughly decomposed, a functional microbial agent is added, secondary fermentation is conducted after uniform stirring, and then after the second fermentation, the straw bio-organic fertilizer is obtained; and (3) organic acid is added into the straw bio-organic fertilizer, and uniform mixing is conducted to obtain the heavy metal activator. According to the application, through crop-rotation combined planting of soybeans and oilseed rape, the heavy metal is activated by the heavy metal activator, so that heavy metal in the soil can be convertedinto an effective state as much as possible to realize the continuous absorption of heavy metal, the joint restoration efficiency is improved, and the easy-to-implement and efficient combined restoration method is also provided for restoring heavy metal contaminated farmland soil.

Description

technical field [0001] The invention relates to the technical field of heavy metal polluted farmland restoration, in particular to a heavy metal activator and its application in combined soil restoration. Background technique [0002] Soil is the main material basis for human survival. With the acceleration of industrialization and urbanization, soil heavy metal pollution is becoming more and more serious, including cadmium (Cd), lead (Pb), chromium (Cr), copper (Cu), zinc (Zn), mercury (Hg), arsenic (As ), nickel (Ni), etc. are more common heavy metal pollution. On average, 5 million tons of Pb, 3.4 million tons of Cu, about 15,000 tons of Hg, 15 million tons of Mn, and 1 million tons of Ni are discharged every year in the world, which seriously pollutes the environment. In my country, about 25 million hectares of farmland soil is polluted by heavy metals, and 12 million tons of grains are polluted by heavy metals every year, causing direct economic losses of more than 10...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/08C05F17/00C05G3/04C09K17/14C09K101/00C05G3/80
CPCB09C1/08B09C2101/00C05C9/00C09K17/14C09K2101/00C05F17/50C05G3/80C05F5/002C05F11/00C05F11/08Y02W30/40
Inventor 文亚雄谭石勇谭武贵郭帅李雪玲张冬雪
Owner 湖南泰谷生态工程有限公司
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