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Soil remediation agent using poultry manure as raw material, preparation method and application

A technology of soil remediation agent and poultry manure, which is applied in the restoration, application, and fertilizer mixture of polluted soil. It can solve the problem that the removal efficiency of heavy metal ions cannot meet the actual needs, and achieve resource utilization and good restoration effect. , enhance the effect of activity

Inactive Publication Date: 2015-07-29
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After the soil was treated with biochar, the distribution of cadmium forms in the soil changed significantly: the content of exchanged cadmium dropped from 83% to below 68%, the content of carbonate bound state increased from less than 11% to 15%, iron and manganese oxidized The bound content increased from 2% to 9%, and the organic content increased from 3% to 9%, but the removal efficiency of biochar to heavy metal ions in soil obviously cannot meet the actual needs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] First, chicken manure was pyrolyzed under anoxic conditions to prepare biochar, and crushed (particle size less than 1mm); then, biochar and pig manure were mixed at a mass ratio of 1 / 1, and an appropriate amount of soil was added to control the mixture C / N is 30 to obtain compost raw materials; finally, put the compost raw materials in the composting place for composting treatment, during the composting period, adjust the moisture content in time to keep the moisture content at 50%~60%, turn the compost once a day to avoid local anaerobic, The composting process lasts for 30 days until the compost raw materials form humus, which is the soil remediation agent.

Embodiment 2

[0023] The soil remediation agent prepared by the present invention (the soil remediation agent obtained in Example 1) is added to heavy metals (taking cadmium as an example) and organic pollutants (taking pyrene as an example) polluted by 5% of the dry weight of the soil to be repaired. In the soil, the properties of the tested soil are shown in Table 1, plowed in time, and plowed again after one month.

[0024] Table 1: Properties of the tested soils

[0025] pH Organic matter (%) Total nitrogen (g / kg) Total phosphorus (g / kg) Cation exchange capacity (cmol / kg) Total cadmium (mg / kg) Extractable cadmium (mg / kg) Pyrene (mg / kg) 6.1 11.54 2.19 0.30 19.07 0.12 0.04 172.68

Embodiment 3

[0027] According to the soil remediation agent of the present invention in embodiment 2, the soil remediation experiment was carried out. Table 2 is the comparison table of the removal rate of extractable cadmium and pyrene by soil remediation agent of the present invention and general remediation agent, general remediation agent comprises common compost product, biochar and common compost product and biochar mixed restoration agent (common compost product and biological carbon in equal proportions), the production control conditions and other experimental conditions of common compost products in this control test are the same as those of the soil remediation agent of the present invention. Two months later, samples were taken to measure and analyze the removal rate of extractable cadmium and pyrene, and the recorded data are shown in Table 2 (unit: %).

[0028] Table 2: Soil remediation agent of the present invention and general remediation agent are to the removal rate contr...

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Abstract

The invention relates to a soil restoration agent and specifically relates to a soil restoration agent made from feces of livestock and poultry as well as a preparation method and application thereof, wherein the soil restoration agent is prepared by the following steps: mixing biochar, the feces of livestock and poultry and the soil to obtain compost material; and carrying out compost treatment to the compost materials to obtain the soil restoration agent. The soil restoration agent disclosed by the invention is good in restoration effect, free of toxic and side effect, and capable of restoring various pollutions and composite pollution. The preparation method of preparing the soil restoration agent disclosed by the invention is simple in process and low in cost; and the soil restoration agent disclosed by the invention not only efficiently restores polluted soil, but also recycles biomass resources, especially feces of livestock and poultry.

Description

technical field [0001] The invention relates to a soil remediation agent, in particular to a soil remediation agent using poultry manure as a raw material, a preparation method and an application. Background technique [0002] Soil is a natural resource that is difficult to regenerate and an important basis for human production activities. At present, the situation of soil pollution in my country is relatively severe, including heavy metal pollution and organic pollution. The safety of agricultural products caused by soil pollution cannot be ignored: soil pollution can reduce crop yield and quality, and also endanger human health through the transmission and enrichment of food chains. In order to remediate polluted soil, countries around the world, especially developed countries, have invested huge manpower, material and financial resources in soil remediation research in recent years, and have made some progress. [0003] Contaminated soil remediation generally reduces th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C05G3/04B09C1/08B09C1/10C05G3/80
Inventor 武海鹏曾光明梁婕晏铭李忠武李晓东鲁伦慧陈明陈安伟袁玉洁刘洋
Owner HUNAN UNIV
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