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Soil heavy metal repairing agent and application thereof to jointly contaminated soil

A technology that pollutes soil and heavy metals. It is applied in applications, soil conditioning materials, fertilizer mixtures, etc. It can solve problems such as large engineering volume, narrow application area, and difficulty in repeated implementation.

Inactive Publication Date: 2014-10-29
CHENGDU NEWSUN CROPSCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Chinese patent 200910115020 discloses a soil remediation method. By digging a liquid injection well and building a reaction wall, the chitosan eluent is injected into the soil. However, the inventors found that this method has a large amount of engineering, is inconvenient to apply, and is difficult to popularize. ;
[0006] Chinese patent 201110413145 discloses a method for remediating heavy metal cadmium-contaminated soil, using cadmium-resistant tobacco varieties, chitosan solution and microorganisms that activate heavy metal cadmium in the soil to work together, but its application is narrow and difficult to repeat;
[0009] In the prior art, compositions comprising chitosan and lentinan are used in pharmaceutical compositions for human use, such as the lentinan-chitosan nanoparticles with anti-tumor effects and immune enhancement effects disclosed in Chinese patent 200910154959, The bioactive polysaccharide self-assembly modification material with antibacterial activity and cytocompatibility disclosed in Chinese patent 201010112065 has not been used in farmland soil as an agricultural composition, and these existing technologies have high costs and cannot be used as an agricultural composition. Industrial application of chemicals in farmland soil

Method used

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  • Soil heavy metal repairing agent and application thereof to jointly contaminated soil
  • Soil heavy metal repairing agent and application thereof to jointly contaminated soil
  • Soil heavy metal repairing agent and application thereof to jointly contaminated soil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] Embodiment 1 The preparation of soil remediation agent of the present invention

[0058] Chitosan (Chengdu Qimei Biological Technology Co., Ltd.) and lentinan contained in the soil remediation agent of the present invention can all adopt commercially available products, but preferably the lentinan with a larger amount of consumption can be prepared according to the following method, so that its cost is lower Low, more suitable for promotion and application.

[0059] (1) Preparation of Lentinan

[0060] Crush the fruiting bodies of shiitake mushrooms, pass through a 30-mesh sieve, take 200kg of powder that can pass through the sieve (the particles that cannot pass the sieve will be returned to the pulverizer for crushing), add 1000L of water and soak at 80°C for 1 hour, stir during the period, and then filter to retain the clear liquid; Add 1000L water to soak for 1 hour at 80°C for the first soaking residue, stir during the period, then filter to retain t...

Embodiment 2

[0065] Embodiment 2 Soil remediation agent of the present invention studies on soil heavy metal remediation and plant quality improvement

[0066] The Soil and Fertilizer Research Institute of Sichuan Academy of Agricultural Sciences was entrusted to conduct a field test in Pujiang County in a tea garden planted with the No. 9 variety of Chuancha. At the beginning of the test, the following soil repair agent or control was directly applied to the randomly grouped plots, and the soil was turned over. The rest refers to the conventional management of tea gardens:

[0067] A, negative control group: negative control, 90kg / mu;

[0068] B, positive control group 1: positive control group 1, 90kg / mu;

[0069] C, positive control group 2: positive control group 2, 90kg / mu;

[0070] D, low-dose experimental group: soil remediation agent of the present invention, 22.5kg / mu;

[0071] E, middle dose experimental group: soil remediation agent of the present invention, 45kg / mu; ...

Embodiment 3

[0083] Embodiment 3 Soil remediation agent of the present invention is to the research of planting capsicum on the soil polluted by lead, chromium and arsenic

[0084] The Soil and Fertilizer Research Institute of Sichuan Academy of Agricultural Sciences was entrusted to conduct indoor pot experiments and plant Ervitex pepper (purchased from Sichuan Academy of Agricultural Sciences). The test soil was taken from Fuxing Township, Pujiang County, Sichuan Province. After testing, the As content was 8.0mg / kg, the Cr content was 87.6mg / kg, and the Pb content was 31.0mg / kg. The yield per mu of planted plants is 15-50% lower than that of adjacent areas not polluted by factories and mines; in addition, excellent non-polluted soil is taken, in which the content of As is 0.11mg / kg, the content of Cr is 5.6mg / kg, and the content of Pb is 0.11mg / kg. The content is 1.5mg / kg. At the beginning of the experiment, directly mix the following soil remediation agents or controls into the corresp...

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Abstract

The invention provides an application of a repairing composition used in heavy metal contamination of soil. The composition comprises lentinan and chitosan and can be used for increasing the yields of plants such as peppers and the like on the heavy metal jointly contaminated soil. Besides, the invention also provides a preparation and the like based on the composition.

Description

technical field [0001] The invention belongs to the field of pollutant treatment and the field of agricultural compositions. Specifically, the invention relates to a selective remediation agent for soil heavy metal pollution and its application in combination with polluted soil. Background technique [0002] In recent years, the problem of heavy metal pollution in my country's soil has become increasingly prominent, posing a serious threat to the ecological environment, food safety and human health, which cannot be ignored. Waste gas, waste water, and waste residues discharged from industries such as dyestuffs, chemicals, tanning, mineral mining, smelting, and processing contain a large amount of heavy metals. Into the soil through other methods, resulting in an increase in the content of heavy metals in the soil, especially the exchangeable heavy metals, which are directly absorbed and enriched by crops, directly threatening human health. [0003] At present, the soil is r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/32C09K101/00
Inventor 何其明国锦琳杨锡良廖立群詹绍军姜勇
Owner CHENGDU NEWSUN CROPSCI
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