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A kind of soil conditioner and its preparation method and application

A technology of soil improver and clay powder, which is applied in the field of soil improver and its preparation, can solve the problems of difficult soil improver such as heavy metal, achieve the effect of improving crop root system environment, improving resource utilization rate, simple and cheap preparation method

Active Publication Date: 2021-12-17
SHANDONG SCICOM ECOLOGICAL ENVIRONMENT RES INST CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The nature of pollutants (such as type, form, concentration, etc.), soil conditions (such as pH, permeability, groundwater, etc.), pollution degree, and expected remediation goals are different, as well as factors such as practical limitations, cost, and scope of application of remediation technologies , which becomes the limiting condition for the selection of restoration technology, the inventors found that it is difficult to have a soil heavy metal amendment with high efficiency and low consumption

Method used

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  • A kind of soil conditioner and its preparation method and application
  • A kind of soil conditioner and its preparation method and application

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preparation example Construction

[0030] Wherein, the preparation method of the urban sludge composted material comprises: mixing and fermenting the dewatered sludge, peanut shells and compost backmix;

[0031] The mass ratio of the dewatered sludge, peanut shells and compost backmixture is 2-4:1:1, preferably 3:1:1.

[0032] The specific fermentation method of the material after urban sludge composting includes: spraying water on the mixed material and stirring to make the water content 55-60%, turning over every two to three days to ensure the oxygen content of the pile, turning over every two weeks by spraying water Continue to ferment after homogenizing; after about two months, it becomes soft, non-sticky, and gray-black, which means the preparation is successful.

[0033] The CMC-MnO 2 Nanoparticle preparation methods include:

[0034] Prepare sodium carboxymethylcellulose (CMC) solution and MnCl respectively 2 solution, with nitrogen purging; then, under nitrogen purging, the MnCl 2 The solution is a...

Embodiment 1

[0051] A kind of soil pollution improving agent, its preparation method comprises:

[0052] (1) Preparation of sludge composting products

[0053] Mix municipal sludge (5 parts), peanut shells (1 part), and compost backmix (1 part) according to the weight ratio, then spray water and stir to make the water content 60%, and then ferment; every two to three Turn over the heap to ensure the oxygen content of the heap, spray water every two weeks and then continue to ferment; continue to ferment for about two months.

[0054] (2) CMC-MnO 2 Nanoparticle preparation

[0055] (with 0.4mmol / L CMC-MnO 2 ) as an example, respectively configure 55.6mg / L sodium carboxymethylcellulose (CMC) solution and 4mM MnCl 2 The solution was purged with nitrogen for 20 min. Then, under a nitrogen purge, 3 mL of MnCl 2 The solution was added to 45mL of CMC solution to prepare the solution containing CMC-Mn 2+ Complex mixture. Then, add 4mM KMnO 4 2 mL stock solutions of NaOH and 8 mM were adde...

Embodiment 2

[0059] A kind of soil pollution improving agent, its preparation method comprises:

[0060] (1) Preparation of sludge composting products

[0061] Mix municipal sludge (5 parts), peanut shells (1 part), and compost backmix (1 part) according to the weight ratio, then spray water and stir to make the water content 60%, and then ferment; every two to three Turn over the heap to ensure the oxygen content of the heap, spray water every two weeks and then continue to ferment; continue to ferment for about two months.

[0062] (2) CMC-MnO 2 Nanoparticle preparation

[0063] (with 0.2mmol / L CMC-MnO 2 ) as an example, respectively configure 55.6mg / L sodium carboxymethylcellulose (CMC) solution and 2mM MnCl 2 The solution was purged with nitrogen for 20 min. Then, under a nitrogen purge, 3 mL of MnCl 2 The solution was added to 45mL of CMC solution to prepare the solution containing CMC-Mn 2+ Complex mixture. Then, add 2mM KMnO 4 2 mL stock solutions of NaOH and 4 mM were adde...

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Abstract

The invention provides a soil improver and its preparation method and application, belonging to the technical field of soil improvement. The soil conditioner is granular, and is composed of urban sludge composted material, clay powder and CMC-MnO 2 Nanoparticles are mixed. Not only can it be directly used in heavy metal-contaminated soil in farmland parks to remove a variety of heavy metals, it can also adsorb and remove some organic pollutants in the later stage, and at the same time provide the nutrients needed by the soil, improve the soil environment, and increase agricultural output. Therefore, it has good practical application value.

Description

technical field [0001] The invention belongs to the technical field of soil improvement, and in particular relates to a soil improver and its preparation method and application. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] Soil is one of the essential conditions for biological survival and an important part of the ecological environment. With the use of soil by human social activities, pollutants containing heavy metals or organic pollutants enter the soil through various channels, resulting in the enrichment of corresponding heavy metal elements and organic pollutants in the soil. Heavy metals can exist for a long time in farmland, rivers, lakes, ocean water bodies a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K17/40B09C1/00B01J20/24B01J20/28B01J20/30C05G3/00C05G3/80C09K101/00
CPCC09K17/40B09C1/00B01J20/06B01J20/24B01J20/28004C05G3/00C05G3/80C05D9/00C09K2101/00C05D9/02C05F5/002C05F7/00
Inventor 朱英张爱生邵艳秋邵莹莹李静王启春
Owner SHANDONG SCICOM ECOLOGICAL ENVIRONMENT RES INST CO LTD
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