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Application of environment-friendly enzyme in restoration of soil polluted by heavy metal and restoration method

An environmentally friendly enzyme and technology for polluted soil, applied in the restoration of polluted soil and other directions, can solve problems such as secondary pollution costs, and achieve the effects of short repair cycle, simple preparation method, and improved repair efficiency.

Inactive Publication Date: 2017-11-03
SOUTH CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved in the present invention is to overcome the defects and deficiencies of the above-mentioned existing chemical rinsing technology, and to provide a kind of environmental protection enzyme for leaching heavy metal pollution in view of the problems of secondary pollution and high cost in the leaching repair of heavy metal contaminated soil. Soil Applications

Method used

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  • Application of environment-friendly enzyme in restoration of soil polluted by heavy metal and restoration method
  • Application of environment-friendly enzyme in restoration of soil polluted by heavy metal and restoration method
  • Application of environment-friendly enzyme in restoration of soil polluted by heavy metal and restoration method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] Embodiment 1 Remediation of industrial site heavy metal polluted soil

[0062] 1. A leaching agent for heavy metal-contaminated soil, i.e., an environmentally friendly enzyme, is prepared from three components: kitchen waste, water and brown sugar; wherein, the kitchen waste is composed of the following raw materials in weight percentage: fruit 40%, Vegetables 50%, Plant Leaves 10%:

[0063] The fruit is selected from one or more of oranges, lemons, apples, peaches, melons, and bananas;

[0064] The vegetables are selected from one or more of leafy vegetables, root tubers or fruit vegetables;

[0065] Wherein the plant leaves are selected from one or more of orange leaves, corn leaves, and landscaping pruned leaves.

[0066] 2. According to the above parts by weight, the eluting agent selects the raw materials of each component respectively for subsequent use, and its application method comprises the following steps:

[0067] (1) Preparation of natural acidic washing...

Embodiment 2

[0072] Embodiment 2 Remediation of Farmland Heavy Metal Contaminated Soil

[0073] 1. A leaching agent for heavy metal-contaminated soil, i.e., an environmentally friendly enzyme, is prepared from three components: kitchen waste, water and brown sugar; wherein, the kitchen waste is composed of the following raw materials in weight percentage: fruit 40%, Vegetables 50%, Plant Leaves 10%:

[0074] The fruit is selected from one or more of oranges, lemons, apples, peaches, melons, and bananas;

[0075] The vegetables are selected from one or more of leafy vegetables, root tubers or fruit vegetables;

[0076] Wherein the plant leaves are selected from one or more of orange leaves, corn leaves, and landscaping pruned leaves.

[0077] 2. According to the above parts by weight, the eluting agent selects the raw materials of each component respectively for subsequent use, and its application method comprises the following steps:

[0078] (1) Preparation of natural acidic washing ag...

Embodiment 3

[0081] The impact of embodiment 3 different dilution ratios on the rinse effect

[0082] 1. Washing method

[0083] Environmentally friendly enzymes made from 50% fruits and 50% vegetables were diluted with water in different proportions, and the industrial site soils with very serious heavy metal pollution were washed separately (Cd 106mg / kg, Zn 14430mg / kg, Cu 220 mg / kg, Pb2371mg / kg, Ni 37.1mg / kg, Mn 2.93g / kg), the solid-to-liquid ratio is 1g:3mL, shake and rinse for 1h, and observe the influence of different dilution ratios on the rinse effect.

[0084] 2. Washing results

[0085] Depend on Figure 1 to Figure 5 It can be seen that when the dilution ratio of the environmental protection enzyme is 1:0 to 100, the leaching effect on the soil of industrial sites with serious heavy metal pollution is better. The efficiency is the best, respectively reaching 8.81%, 1.94%, 27%, 9.5% and 25%. However, if the dilution ratio exceeds 1:100, the rinsing effect is not obvious. So ...

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Abstract

The invention discloses application of environment-friendly enzyme in restoration of soil polluted by heavy metal and a restoration method. The environment-friendly enzyme is formed by kitchen waste, water and sugar in a mixed fermentation manner; and the kitchen waste is composed of, by weight percentage, 40%-80% of fruits, 20%-60% of vegetables and 0-30% of plant leaves. The restoration method includes the following steps that S1, a stock solution of the environment-friendly enzyme is prepared; S2, soil to be washed in a sprinkling manner is subjected to impurity removing and screening, and meanwhile the heavy metal content of the soil is analyzed; and S3, sprinkling washing is performed, wherein the stock solution of the enzyme is diluted according to the proportion of 1:0-100 and then serves as an acidic sprinkling washing agent to perform sprinkling washing; when a restoration object is industrial soil, solid-liquid separation is performed after complete mixing, and purifying waste liquid is recycled to be reused; and when a restoration object is farmland soil, after the soil is ploughed loose, the sprinkling washing agent is added to soak the soil for several days, the sprinkling washing liquid is collected at a water draining port, and part of the sprinkling washing agent is irrigated into a plough pan with the heavy metal. The application of the environment-friendly enzyme in restoration of the soil polluted by the heavy metal and the restoration method have the beneficial effects that cost is low, waste is cyclically reused, operation and management are easy, the restoration period is short, secondary pollution is avoided, and the like.

Description

technical field [0001] The present invention belongs to the technical field of heavy metal contaminated soil remediation in the technical field of environmental protection, and more specifically relates to the application of an environmental protection enzyme in the remediation of heavy metal contaminated soil and a method for remediation of heavy metal contaminated soil, including metal smelting and processing, and metal mine contaminated soil Remediation and remediation of farmland soil contaminated by heavy metals. Background technique [0002] Environmentally friendly enzymes (also known as garbage enzymes, Garbage Enzyme) were successfully developed in 2006 by Dr. Rosukon Poompanvong, the founder of the Thai Organic Agriculture Association, after years of experiments. Specifically, mix food waste, brown sugar, and water in a ratio of 3:1:10, put them in a sealed plastic container, tighten the lid of the container, and place it in a cool place with air circulation for 3 ...

Claims

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Application Information

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IPC IPC(8): B09C1/02B09C1/08
CPCB09C1/02B09C1/08
Inventor 蒋成爱吴顺辉郑少杰施佳诚
Owner SOUTH CHINA AGRI UNIV
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