Cobalt-polluted soil conditioner

A technology for the improvement and modification of polluted soil, applied in the field of soil remediation, can solve the problems of secondary soil pollution and unsatisfactory treatment efficiency, and achieve the effect of reducing the cobalt content

Inactive Publication Date: 2017-05-31
ZHENGZHOU BEIDOU COMM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing stabilizers generally have the problems of unsatisfactory treatment efficiency and easy to cause secondary pollution to the soil.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] In the embodiment of the present invention, a cobalt-contaminated soil improver is made of the following raw materials in parts by mass: 24 parts of modified diatomite, 16 parts of sodium sulfide, 12 parts of potassium dihydrogen phosphate, and 11 parts of volcanic glass rock Wherein, the modification step of modified diatomite is as follows: get pumice stone, be the pumice stone powder of 12 μm granularity through superfine pulverization; Add pumice stone powder to the mass concentration of 2.4 times of its quality and be in the nitric acid solution of 48%, with Stir at a speed of 60r / min for 40min, filter, wash until neutral, and dry; then mix with a sodium tartrate solution with a mass concentration of 16% of 0.42 times the mass of pumice powder, heat to 56°C, and use a power of 300W. Ultrasonic treatment at a frequency of 27 kHz for 20 minutes, filtering, washing, drying, grinding, and passing through a 250-mesh sieve to obtain modified diatomite.

[0016] The prepa...

Embodiment 2

[0018] In the embodiment of the present invention, a cobalt-contaminated soil improver is made of the following raw materials in parts by mass: 28 parts of modified diatomite, 19 parts of sodium sulfide, 9 parts of potassium dihydrogen phosphate, and 7 parts of volcanic glass rock. Wherein, the modification step of modified diatomaceous earth is as follows: get pumice stone, be the pumice stone powder of 15 μ m grain size through superfine pulverization; Add pumice stone powder into the mass concentration of 2.6 times of its quality and be in the nitric acid solution of 48%, with Stir at a speed of 70r / min for 30min, filter, wash until neutral, and dry; then mix with a sodium tartrate solution with a mass concentration of 16% of 0.45 times the mass of pumice powder, heat to 58°C, and use a power of 320W, Ultrasonic treatment at a frequency of 28 kHz for 15 minutes, filtration, washing, drying, grinding, and passing through a 300-mesh sieve to obtain modified diatomite.

[0019...

Embodiment 3

[0021] In the embodiment of the present invention, a cobalt-contaminated soil improver is made of the following raw materials in parts by mass: 25 parts of modified diatomite, 17 parts of sodium sulfide, 12 parts of potassium dihydrogen phosphate, and 10 parts of volcanic glass rock. Wherein, the modification step of modified diatomite is as follows: get pumice stone, be the pumice stone powder of 12 μm grain size through superfine pulverization; Pumice stone powder is added in the nitric acid solution that the mass concentration of 2.6 times of its quality is 48%, with Stir at a speed of 60r / min for 40min, filter, wash until neutral, and dry; then mix with a sodium tartrate solution with a mass concentration of 16% of 0.42 times the mass of pumice powder, heat to 58°C, and use a power of 300W, Ultrasonic treatment at a frequency of 28 kHz for 15 minutes, filtration, washing, drying, grinding, and passing through a 300-mesh sieve to obtain modified diatomite.

[0022] The prep...

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PUM

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Abstract

The invention discloses a cobalt-polluted soil conditioner; the cobalt-polluted soil conditioner is prepared from, by mass, 24-28 parts of modified diatomite, 16-19 parts of sodium sulfide, 9-12 parts of monopotassium phosphate, 7-11 parts of volcanic glass rock, wherein the modified diatomite is prepared by performing superfine grinding treatment on pumice powder, stirring with nitric acid, filtering, washing, drying, adding sodium tartrate and mixing, performing hot ultrasound wave treatment, filtering, washing, drying, grinding and sieving; crushing every raw material, sieving, mixing and evenly stirring the raw material. The conditioner can significantly reduce the cobalt content in the heavy metal cobalt-polluted soil; when the conditioner is applied to the soil improvement of which cobalt content is 238.4 mg/kg, the cobalt removal rate is 85.5-96.3%, and the conditioner is free from the secondary pollution.

Description

technical field [0001] The invention relates to the technical field of soil remediation, in particular to a cobalt-contaminated soil improver. Background technique [0002] With the rapid development of the global economy, the problem of environmental pollution has become increasingly serious, among which heavy metal pollution in soil has attracted much attention. Heavy metals are highly enriched in soil, which deteriorates the quality of soil environment, not only threatens the yield and quality of crops, but also endangers the ecological cycle of soil. Humans are at the highest level of the food chain. On the one hand, the crops planted on heavy metal-contaminated soil absorb the heavy metals, and then transfer them to animals and humans through the food chain, thus causing harm to the health of animals and humans. In addition, heavy metal pollution is also a serious threat to the human living environment. [0003] Among various heavy metals, high concentrations of cobal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/04B09C1/08C09K101/00
CPCC09K17/04B09C1/08C09K2101/00
Inventor 不公告发明人
Owner ZHENGZHOU BEIDOU COMM TECH
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