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Cobalt polluted soil improver and preparation method thereof

A technology for improving and modifying contaminated 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: 2017-05-24
ZHENGZHOU YUANRAN BIOLOGY TECH CO LTD
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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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  • Cobalt polluted soil improver and preparation method thereof
  • Cobalt polluted soil improver and preparation method thereof

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 pumice powder, 16 parts of ferrous sulfide, 12 parts of calcium superphosphate, and 11 parts of volcanic glass rock Wherein, the modification step of modified pumice powder is as follows: get pumice stone, be the pumice stone powder of 12 μ m 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 60r / Stir at a speed of 40 min, 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 and a frequency of Ultrasonic treatment at 27 kHz for 20 minutes, filtering, washing, drying, grinding, and passing through a 250-mesh sieve to obtain modified pumice powder.

[0016] The pr...

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 pumice powder, 19 parts of ferrous sulfide, 9 parts of superphosphate, and 7 parts of volcanic glass rock Wherein, the modification step of modified pumice powder is as follows: get pumice stone, be the pumice stone powder of 15 μ m granularity through superfine pulverization; Add pumice stone powder to the mass concentration of 2.6 times of its quality and be in the nitric acid solution of 48%, with 70r / Stir at a speed of 30 min, 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 and a frequency of Ultrasonic treatment at 28 kHz for 15 minutes, filtering, washing, drying, grinding, and passing through a 300-mesh sieve to obtain modified pumice powder.

[0019] The preparation ...

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 pumice powder, 17 parts of ferrous sulfide, 12 parts of calcium superphosphate, and 10 parts of volcanic glass rock Wherein, the modification step of modified pumice powder is as follows: get pumice stone, be the pumice stone powder of 12 μ m particle size through superfine pulverization; Add pumice stone powder to the mass concentration of 2.6 times of its quality and be in the nitric acid solution of 48%, with 60r / Stir at a speed of 40 min, 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 and a frequency of Ultrasonic treatment at 28 kHz for 15 minutes, filtering, washing, drying, grinding, and passing through a 300-mesh sieve to obtain modified pumice powder.

[0022] The ...

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Abstract

The invention discloses a cobalt polluted soil improver and a preparation method thereof. The improver is prepared from the following raw materials in parts by mass: 24-28 parts of modified ground pumice, 16-19 parts of ferrous sulfide, 9-12 parts of calcium superphosphate and 7-11 parts of volcanic glass, wherein the modified ground pumice is formed by carrying out micro-crushing treatment on ground pumice, adding nitric acid and carrying out stirring treatment, filtering, washing, drying, adding sodium tartrate and mixing, carrying out heat ultrasonic treatment, filtering, washing, drying, grinding and sieving, crushing all the raw materials, filtering, mixing and uniformly mixing. According to the improver disclosed by the invention, the content of cobalt in heavy metal cobalt polluted soil can be remarkably reduced; and when the improver is applied to improvement of soil with the cobalt content of 238.4mg / kg, the removal rate of the cobalt is 85.5%-96.3% and a secondary pollution problem is not caused.

Description

technical field [0001] The invention relates to the technical field of soil remediation, in particular to a cobalt-contaminated soil improver and a preparation method thereof. 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 met...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/06B09C1/08
CPCC09K17/06B09C1/08
Inventor 不公告发明人
Owner ZHENGZHOU YUANRAN BIOLOGY TECH CO LTD
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