Repair agent for treating compound pollution of heavy metal in soil and preparation method of repair agent

A technology for compound pollution and heavy metals, applied in the field of soil pollution remediation, can solve the problem that remediation agents cannot passivate and remediate multiple heavy metals at the same time, and achieve the effects of promoting heavy metal conversion, enhancing stability and easy promotion.

Inactive Publication Date: 2017-06-06
四川省有色冶金研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Aiming at the above-mentioned deficiencies in the prior art, the present invention provides a remediation agent for treating heavy metal complex pollution in soil and a preparation method thereof, which effectively solves the problem that the existing remediation agent cannot passivate and repair multiple heavy metals at the same time

Method used

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  • Repair agent for treating compound pollution of heavy metal in soil and preparation method of repair agent
  • Repair agent for treating compound pollution of heavy metal in soil and preparation method of repair agent

Examples

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Embodiment 1

[0032] A remediation agent for treating heavy metal complex pollution in soil, comprising the following components in parts by weight: 6 parts of modified nano-carbon black, 4 parts of sodium-based bentonite-loaded nano-zero-valent iron, 2 parts of hydroxyapatite, and 8 parts of decomposed straw 2 parts and 2 parts of decomposed wine residue.

[0033] Among them, the modified nano-carbon black is prepared by the following method: Weigh 10g of nano-carbon black, wash with deionized water, dry to constant weight at 100°C, then add 200ml of concentrated nitric acid, react at 140°C for 2h, centrifuge , remove the supernatant, and then wash and centrifuge repeatedly with distilled water until the pH of the supernatant is 2 and keep it constant, then dry it at 120°C to constant weight to obtain modified nano-carbon black.

[0034] Sodium-based bentonite-loaded nano-zero-valent iron is prepared by the following method:

[0035] (1) Pulverize 100 g of calcium-based bentonite, pass th...

Embodiment 2

[0043] A remediation agent for treating heavy metal complex pollution in soil, comprising the following components in parts by weight: 8 parts of modified nano-carbon black, 5 parts of sodium-based bentonite-loaded nano-zero-valent iron, 1 part of hydroxyapatite, and 3.75 parts of decomposed straw And 1.25 parts of decomposed wine residue.

[0044] Among them, the modified nano-carbon black is prepared by the following method: Weigh 12g of nano-carbon black, wash it with deionized water, dry it to constant weight at 120°C, add 210ml of concentrated nitric acid, react at 140°C for 2h, and centrifuge , remove the supernatant, and then wash and centrifuge repeatedly with distilled water until the pH of the supernatant is 5 and keep it constant, and then dry at 120°C to constant weight to obtain modified nano-carbon black.

[0045] Sodium-based bentonite-loaded nano-zero-valent iron is prepared by the following method:

[0046] (1) Pulverize 120 g of calcium-based bentonite, pass...

Embodiment 3

[0054] A remediation agent for treating heavy metal complex pollution in soil, comprising the following components in parts by weight: 8 parts of modified nano-carbon black, 5 parts of sodium-based bentonite-loaded nano-zero-valent iron, 2 parts of hydroxyapatite, and 4 parts of decomposed straw And 2 parts of decomposed wine residue.

[0055] Among them, the modified nano-carbon black is prepared by the following method: Weigh 12g of nano-carbon black, wash it with deionized water, dry it to constant weight at 110°C, add 220ml of concentrated nitric acid, and react at 120°C for 2.5h. Centrifuge to remove the supernatant, then wash and centrifuge repeatedly with distilled water until the pH of the supernatant is 4 and keep it constant, then dry at 100°C to constant weight to obtain modified nano carbon black.

[0056] Sodium-based bentonite-loaded nano-zero-valent iron is prepared by the following method:

[0057] (1) Pulverize 120g of calcium-based bentonite, pass through a ...

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Abstract

The invention discloses a repair agent for treating compound pollution of a heavy metal in soil and a preparation method of the repair agent. The repair agent is prepared from the following components in parts by weight: 6-8 parts of modified nano-carbon black, 2-5 parts of sodium bentonite-loaded nano zero-valent iron, 1-2 parts of phosphate mineral and 5-10 parts of decomposed forestry and agricultural residues. The preparation method comprises the steps of (1) crushing the phosphate mineral and the decomposed forestry and agricultural residues into powder of which the particle size is 100-200 meshes separately and drying for later use; and (2) mixing the modified nano-carbon black, the phosphate mineral, the sodium bentonite-loaded nano zero-valent iron and the decomposed forestry and agricultural residues according to the formula, and stirring in a closed container to prepare the repair agent for treating compound pollution of the heavy metal in the soil.

Description

technical field [0001] The invention relates to the technical field of soil pollution remediation, in particular to a remediation agent for treating heavy metal complex pollution in soil and a preparation method thereof. Background technique [0002] As my country's economy grows and the scale of industrial production continues to expand, soil, a resource that humans rely on for survival, is under increasing pressure. Soil heavy metal pollution has become one of the most polluted and most harmful environmental problems in China. [0003] The area of ​​cultivated land polluted by heavy metals in my country exceeds 20 million hm 2 , accounting for about 1 / 5 of the cultivated land area; 1.4 million hm in my country 2 In the sewage irrigation area, 64.8% of the land is polluted by heavy metals, of which 46.7% are lightly polluted, 9.7% are moderately polluted, and 8.4% are seriously polluted; about 12 million tons of heavy metal-polluted grain are produced in my country every y...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/40B09C1/08C09K101/00C09K109/00
CPCB09C1/08B09C2101/00C09K17/40C09K2101/00C09K2109/00
Inventor 徐瑞江桐桐贾元波伍建军赵映卢勇李波
Owner 四川省有色冶金研究院有限公司
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