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Reagent and method for restoring mercury-polluted soil by using modified activated carbon

A technology of activated carbon and mercury pollution, applied in the restoration of polluted soil, soil conditioning materials, chemical instruments and methods, etc., can solve problems such as poor effect, environmental impact, secondary soil pollution, etc. Easy availability of materials and the effect of improving soil fertility

Inactive Publication Date: 2019-08-20
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the nature of various substances, a single addition of a certain stabilizer may not be effective, or have a certain impact on the environment, or even cause secondary pollution to the soil. Therefore, a new type of non-polluting and stable and efficient Stabilizers have undoubtedly become a research hotspot in the stabilization of mercury-contaminated soils

Method used

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  • Reagent and method for restoring mercury-polluted soil by using modified activated carbon
  • Reagent and method for restoring mercury-polluted soil by using modified activated carbon

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] S1. Weigh 10g of activated carbon powder and place it in a 250mL conical flask, add KMnO with a concentration of 0.03mol / L according to the solid-to-liquid ratio of 1:5g / mL 4 solution, sealed. Place in a constant temperature shaking box for shaking reaction. Adjust the condition of the constant temperature shaking box to 25°C, 200±10r / min, and shake for 12h.

[0029] S2. Wash the activated carbon after the shaking reaction in S1 above to neutrality with deionized water, put it into an oven at 100°C for drying, and grind it for later use to obtain oxidatively modified activated carbon.

[0030] S3. Measure 35 mL of ethanol and 2.5 mL of water into a 250 mL Erlenmeyer flask, slowly add 5.5 mL of trimercaptopropyltrimethoxysilane, and let stand for half an hour. Take 10g of the above-mentioned oxidation-modified activated carbon in S2, stir it into the Erlenmeyer flask, seal it, adjust the condition of the constant temperature shaking box to 25°C, 110±10r / min, and shake ...

Embodiment 2

[0039] S1. Weigh 10g of activated carbon powder and place it in a 250mL conical flask, add KMnO with a concentration of 0.03mol / L according to the solid-to-liquid ratio of 1:5g / mL 4 Solution, sealed; placed in a constant temperature shaking box for shaking reaction. Adjust the condition of the constant temperature shaking box to 25°C, 200±10r / min, and shake for 12h.

[0040] S2. The activated carbon shaken in S1 above was washed with deionized water until neutral, dried in an oven at 105° C., ground for later use, and oxidized modified activated carbon was obtained.

[0041] S3. Measure 70 mL of ethanol and 5 mL of water into a 250 mL Erlenmeyer flask, slowly add 11 mL of trimercaptopropyltrimethoxysilane, and let stand for half an hour. Take 10g of the above-mentioned oxidation-modified activated carbon in S2, stir it into the Erlenmeyer flask, seal it, adjust the condition of the constant temperature shaking box to 25°C, 110±10r / min, and shake it for 6h.

[0042] S4. Wash ...

Embodiment 3

[0045] S1. Weigh 10g of activated carbon powder and place it in a 250mL conical flask, add KMnO with a concentration of 0.03mol / L according to the solid-to-liquid ratio of 1:5g / mL 4 solution, sealed. Place in a constant temperature shaking box for shaking reaction. Adjust the condition of the constant temperature shaking box to 25°C, 200±10r / min, and shake for 12h.

[0046]S2. The activated carbon shaken in S1 above was washed with deionized water until neutral, dried in an oven at 100°C, and ground for later use to obtain oxidatively modified activated carbon.

[0047] S3. Measure 70 mL of ethanol and 5 mL of water into a 250 mL Erlenmeyer flask, slowly add 11 mL of trimercaptopropyltrimethoxysilane, and let stand for half an hour. Take 5g of the above-mentioned oxidation-modified activated carbon in S2, stir it into the Erlenmeyer flask, seal it, adjust the condition of the constant temperature shaking box to 25°C, 110±10r / min, and stir for 6h.

[0048] S4. Wash the modif...

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Abstract

The invention relates to a reagent and method for restoring mercury-polluted soil by using modified activated carbon. The modified activated carbon is oxidation-activated carbon supporting sulfydryl and is prepared by the following steps: S1, adding activated carbon powder into a solution of KMnO4, H2O2 and HNO3, carrying out sealing, and carrying out an oscillating reaction; S2, washing the activated carbon subjected to the oscillation reaction in the step S1 to neutrality by using deionized water, and carrying out drying and grinding to obtain oxidation-modified activated carbon; S3, addingthe oxidation-modified activated carbon obtained in the step S2 into a sulfydryl material, carrying out sealing, and then carrying out a constant-temperature oscillation reaction; and S4, washing themodified activated carbon subjected to the oscillation reaction in the step S3 to neutrality by using ethanol and deionized water, carrying out secondary drying, and carrying out grinding to obtain the oxidation-activated carbon supporting sulfydryl. The provided reagent for restoring the mercury-polluted soil by using the modified activated carbon is simple to operate, the materials are easily available, stabilization efficiency of the modified activated carbon to the mercury-polluted soil is greatly improved, and secondary pollution is avoided.

Description

technical field [0001] The invention relates to a reagent and method for repairing mercury-contaminated soil by using modified activated carbon, and belongs to the technical field of repair methods for mercury-contaminated soil. Background technique [0002] Mercury, also known as mercury, is a highly toxic heavy metal element. Mercury pollution sources are very extensive, including metal smelting, fossil fuel combustion, cement production, and chlor-alkali industry. At the same time, mercury pollution is characterized by persistence, high bioaccumulation, and long-distance transmission. are responsible for most of the mercury contamination. Due to the complex physical and chemical properties of soil, the remediation of mercury-contaminated soil has become a hot topic in current research. At present, mercury-contaminated soil remediation technologies are mainly divided into physical remediation, chemical remediation and biological remediation. Specifically, there are deep...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/08C09K17/02
CPCB09C1/08C09K17/02
Inventor 龚建军杨合李述贤郑旭东陈小桐
Owner NORTHEASTERN UNIV
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