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Cadmium-nickel contaminated soil remediator and preparation method

A technology of contaminated soil and remediation agent, which is applied in the field of remediation agent and preparation of cadmium-nickel contaminated soil, which can solve problems such as human health hazards and reduce the quality of agricultural products, and achieve the effects of increasing biomass, reducing mobility, and enhancing passivation effect

Inactive Publication Date: 2018-12-07
盐城英贝吉环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Heavy metal pollution in the soil environment will reduce the quality of agricultural products, and these products will also bring potential harm to human health after being eaten

Method used

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  • Cadmium-nickel contaminated soil remediator and preparation method
  • Cadmium-nickel contaminated soil remediator and preparation method
  • Cadmium-nickel contaminated soil remediator and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A kind of cadmium-nickel contaminated soil remediation agent provided by the present embodiment comprises the following components in parts by weight: biochar 70kg, oxalic acid activated phosphate rock powder 5kg, zinc fertilizer 2kg, lime 4kg, fly ash 10kg.

[0026] Among them, the preparation process of biochar is as follows: use rice husk to pyrolyze biochar under 510°C anoxic condition; dry at 50°C, finely grind the ingredients, and pass through a 100-mesh sieve.

[0027] Among them, the preparation steps of oxalic acid activated phosphate rock powder are as follows: mix oxalic acid and phosphate rock powder evenly according to the liquid-solid ratio of 12:1, and the concentration of oxalic acid is 0.4mol / L; the mixed solution is placed in a constant temperature environment of 26°C for 5 days activation ; After activation, dry at 50°C, then finely grind the ingredients and pass through a 100-mesh sieve.

[0028] Wherein, the zinc fertilizer comprises the following c...

Embodiment 2

[0040] A kind of cadmium-nickel contaminated soil remediation agent provided by the present embodiment comprises the following components in parts by weight: biochar 80kg, oxalic acid activated phosphate rock powder 7kg, zinc fertilizer 3kg, lime 5kg, fly ash 13kg.

[0041] Among them, the preparation process of biochar is as follows: use rice husk to pyrolyze biochar under 513°C anoxic condition; dry at 50°C, finely grind the ingredients, and pass through a 100-mesh sieve.

[0042] Among them, the preparation steps of oxalic acid activated phosphate rock powder are as follows: mix oxalic acid and phosphate rock powder evenly according to the liquid-solid ratio of 12:1, and the concentration of oxalic acid is 0.4mol / L; the mixed solution is placed in a constant temperature environment of 28°C for 5 days activation ; After activation, dry at 50°C, then finely grind the ingredients and pass through a 100-mesh sieve.

[0043] Wherein, the zinc fertilizer comprises the following c...

Embodiment 3

[0055] A kind of cadmium-nickel polluted soil remediation agent provided by the present embodiment comprises the following components in parts by weight: biochar 90kg, oxalic acid activated phosphate rock powder 8kg, zinc fertilizer 4kg, lime 6kg, fly ash 15kg.

[0056] Among them, the preparation process of biochar is as follows: use rice husk to pyrolyze biochar under 515°C anoxic condition; dry at 50°C, finely grind the ingredients, and pass through a 100-mesh sieve.

[0057] Among them, the preparation steps of oxalic acid activated phosphate rock powder are as follows: mix oxalic acid and phosphate rock powder evenly according to the liquid-solid ratio of 12:1, and the concentration of oxalic acid is 0.4mol / L; the mixed solution is placed in a constant temperature environment of 30°C for activation for 6 days ; After activation, dry at 52°C, then finely grind the ingredients and pass through a 100-mesh sieve.

[0058] Wherein, the zinc fertilizer includes the following co...

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Abstract

The invention discloses a cadmium-nickel contaminated soil remediator, relating to the technical field of remediating soil heavy metal pollution. The cadmium-nickel contaminated soil remediator comprises the following components in parts by weight: 70-90 parts of bio-charcoal, 5-8 parts of oxalic acid activated ground phosphate rock, 2-4 parts of zinc fertilizer, 4-6 parts of lime, and 10-15 partsof pulverized fuel ash. The bio-charcoal and oxalic acid activated ground phosphate rock can promote the conversion of weak-acid extractable Cd and Ni to reduction-state Cd and Ni and residue-state Cd and Ni, the effect of combined use is superior to that of single use.

Description

technical field [0001] The invention relates to the technical field of remediation of soil heavy metal pollution, in particular to a cadmium-nickel polluted soil remediation agent and a preparation method thereof. Background technique [0002] With the development of modern industrialization and urbanization, human activities have led to increasingly serious heavy metal pollution in the soil environment. Heavy metal pollution in the soil environment will reduce the quality of agricultural products, and these products will also bring potential harm to human health after being eaten. The harmfulness of heavy metals to the human body is mainly reflected in the difficulty of degradation of heavy metals. Generally, organic compounds can reduce or remove their harmfulness through physical, chemical or biological purification in nature itself; while heavy metals are enriched, difficult to degrade in the environment, and enriched by hundreds of times through the biological amplific...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/08C09K17/04C05G3/04C09K101/00C09K109/00C05G3/80
CPCC05B17/00C05G3/80C09K17/04C09K17/08C09K2101/00C09K2109/00C05D3/02C05D9/00C05D9/02C05F11/02
Inventor 邵丹雄
Owner 盐城英贝吉环保科技有限公司
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