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Organic modifier capable of passivating copper, zinc, arsenic and chromium in vegetable field soil

An amendment, a technology for vegetable fields, applied in the field of As, Zn, Cr organic amendments, passivated vegetable soil Cu field, can solve the problem of reducing the bioavailability of heavy metals, passivate the activity of heavy metals in soil, and promote plant growth. , high economical effect

Active Publication Date: 2015-07-01
INST OF SOIL SCI CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, vermicompost has a large surface area and is rich in various microbial groups such as bacteria, actinomycetes, and fungi. The microorganisms themselves and the interaction between microorganisms and various organic and inorganic colloids can biosorb, enrich, and precipitate heavy metals. behavior, which reduces the bioavailability of heavy metals in the short term

Method used

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  • Organic modifier capable of passivating copper, zinc, arsenic and chromium in vegetable field soil
  • Organic modifier capable of passivating copper, zinc, arsenic and chromium in vegetable field soil
  • Organic modifier capable of passivating copper, zinc, arsenic and chromium in vegetable field soil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] It is made by mixing red mud and vermicompost, wherein the red mud is the waste produced by sintering aluminum smelting, rich in oxides such as silicon oxide, calcium oxide, iron oxide, etc., it is air-dried and pulverized through a 100-mesh sieve The mass ratio of the improver is 4% wt; the vermicompost is made of cow dung as the main raw material, mixed with corn stalks and rice stalks through earthworm biological treatment, wherein the organic matter content is ≥ 45%, and the total nutrient content of nitrogen, phosphorus and potassium is ≥ 5%. %, accounting for 96%wt in the mass proportion of the improver. The total organic matter content in the improver is ≥40%.

[0023] The surface vegetable garden soil (0-20cm) that was lightly polluted by heavy metals in the suburbs of Suzhou was collected (the content of Cu, Zn, Pb, and Cr exceeded the second-level standard of the national soil environmental quality standard (revised) GB15618-2008, but did not reach the third-l...

Embodiment 2

[0034] It is made by mixing red mud and vermicompost, wherein the red mud is the waste produced by sintering aluminum smelting, rich in oxides such as silicon oxide, calcium oxide, iron oxide, etc., it is air-dried and pulverized through a 100-mesh sieve The mass ratio of the improver is 6%wt; the vermicompost is made of cow dung as the main raw material, mixed with corn stalks and rice stalks through earthworm biological treatment, wherein the organic matter content is ≥ 45%, and the total nutrient content of nitrogen, phosphorus and potassium is ≥ 5%. %, accounting for 94%wt in the mass proportion of the improver. The content of organic matter in the improver is ≥40%.

[0035] Pot test and analysis method are the same as in Example 1.

[0036] The test results are shown in Table 3 and Table 4. Table 3 shows that compared with the control, the application of organic amendments containing 6% red mud reduces the activity of Cu, Zn, As, and Cr in the rhizosphere and non-rhizos...

Embodiment 3

[0043] It is made by mixing red mud and vermicompost, wherein the red mud is the waste produced by sintering aluminum smelting, rich in oxides such as silicon oxide, calcium oxide, iron oxide, etc., it is air-dried and pulverized through a 100-mesh sieve The mass ratio of the improver is 8% wt; the vermicompost is made of cow dung as the main raw material, mixed with corn stalks and rice stalks through earthworm biological treatment, wherein the organic matter content is ≥ 45%, and the total nutrient content of nitrogen, phosphorus and potassium is ≥ 5%. %, accounting for 92%wt in the mass proportion of the improver. The total organic matter content in the improver is ≥40%.

[0044] Pot test and analysis method are the same as in Example 1.

[0045] The test results are shown in Table 5 and Table 6. Table 5 shows that, compared with the control, the application of organic amendments containing 8% red mud reduces the activity of Cu, Zn, As, Cr in the rhizosphere and non-rhizo...

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Abstract

The invention discloses an organic modifier capable of passivating copper, zinc, arsenic and chromium in vegetable field soil. The organic modifier is mainly composed of red mud and wormcast, wherein the mass content of the red mud is 1-15%. According to the organic modifier, the red mud and the wormcast are mixed and combined in use; due to mutual synergistic effects of the red mud and the wormcast, and the mixture of the red mud and the wormcast and the soil, the passivation effect on copper, zinc, arsenic and chromium in vegetable field soil can be greatly improved and the application cost can be effectively reduced, and furthermore, nutrients needed by the growth of plants also can be provided, the properties of soil can be improved, the activity of heavy metals in soil can be passivated and the yield and quality of agricultural products can be improved; as a result, the organic modifier has a great application prospect. The organic modifier capable of passivating copper, zinc, arsenic and chromium in vegetable field soil has extremely high economic benefit as well as ecologic and social benefits, and is wide in application prospect.

Description

technical field [0001] The invention belongs to the technical field of soil improvers, and in particular relates to an organic improver capable of passivating Cu, Zn, As and Cr in vegetable soil and its application. Background technique [0002] With the aggravation of industrial and urban pollution and the increase in the types and quantities of agricultural chemicals, heavy metals discharged from industry, agriculture and life are increasing, and soil heavy metal pollution is becoming more and more serious. In 2014, the Ministry of Environmental Protection published the "National Soil Pollution Survey Bulletin". The overall soil environment in the country is not optimistic. Some areas have serious soil pollution, and the soil environment quality of cultivated land is worrying. The total point exceeding the standard rate of the national soil is 16.1%, of which the proportion of moderately and lightly polluted points is 15.0%, and the proportion of heavily polluted points is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K17/40C05G3/04C05G3/80
Inventor 王辉戴绪燕汪海燕刘德辉董元华
Owner INST OF SOIL SCI CHINESE ACAD OF SCI
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