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Magnetic remediation material for organic pollution in soil or water, preparation method and application

A technology for remediating materials and organic matter, which is applied in the field of soil/water pollution control to achieve the effects of good ecological compatibility, high stability and catalytic activity

Active Publication Date: 2017-10-10
SHANGHAI JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the other hand, although chemical oxidation technology has made great progress in the remediation of soil / water organic pollution, the development of low-cost, environmentally compatible treatment technology is still an important challenge

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) kaolin is standby after drying, pulverizing and crossing 20 mesh sieve pretreatments;

[0026] (2) Add the sieved kaolin into ferrous sulfate and ferric sulfate solution, the theoretical mass ratio of iron oxide to kaolin is 0.5, the molar ratio of ferrous sulfate and ferric sulfate is 2, and the total iron content is 0.5 mol / L for the preparation of iron salt solution. Add 0.5% manganese chloride of total iron mass. The temperature of the suspension was raised to 60°C and continued to stir for 1 hour to stabilize, adding 5 mol / L of sodium hydroxide to raise the pH value of the solution to 9, and continued to stir for 1 hour;

[0027] (3) After the solid precipitate is separated, dried, and pulverized, heat treatment in air at 5°C / min to 400°C for 12 hours to obtain a magnetically separable organic pollution restoration material;

[0028] (4) The above-mentioned magnetic restoration material is added in the mud of polycyclic aromatic hydrocarbon contaminated soil ...

Embodiment 2

[0030] (1) bentonite is standby after drying, pulverizing and crossing 10 mesh sieve pretreatments;

[0031] (2) Add the sieved bentonite to ferrous sulfate and ferric sulfate solution, the theoretical mass ratio of iron oxide to bentonite is 0.1, the molar ratio of ferrous sulfate to ferric sulfate is 0.5, and the total iron content is 0.1 mol / L for the preparation of iron salt solution. Add 0.1% cobalt chloride by mass of total iron. The temperature of the suspension was raised to 30°C and continued to stir for 0.5 hours to stabilize, adding 1 mol / liter of ammonia water to raise the pH value of the solution to 8, and continued to stir for 0.5 hours;

[0032] (3) After the solid precipitate is separated, dried, and pulverized, heat treatment in air at 1°C / min to 200°C for 1 hour to obtain a magnetically separable organic pollution restoration material;

[0033](4) Add the above-mentioned magnetic restoration material to o-(p) chloronitrobenzene polluted water by 0.5wt%, the...

Embodiment 3

[0035] (1) illite is standby after drying, pulverizing and crossing 10 mesh sieve pretreatments;

[0036] (2) Add the sieved illite into ferrous sulfate and ferric sulfate solution, the theoretical mass ratio of iron oxide and illite is 1, the molar ratio of ferrous sulfate and ferric sulfate is 3, and the total iron content The iron salt solution was prepared at 5 mol / L. Add 5% aluminum sulfate of total iron mass. The temperature of the suspension was raised to 90°C and continued to stir for 5 hours to stabilize, adding 10 mol / L of potassium hydroxide to raise the pH value of the solution to 11, and continued to stir for 2 hours;

[0037] (3) After the solid precipitate is separated, dried, and pulverized, heat treatment at 10°C / min to 500°C in air for 24 hours to obtain a magnetically separable organic pollution restoration material;

[0038] (4) Add the above-mentioned magnetic repair material to the mud of petroleum hydrocarbon contaminated soil by 10wt%, the initial pH ...

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Abstract

The invention relates to a magnetic remediation material for organic matter pollution in soil or water, and preparation as well as application thereof. Preparation comprises the following steps of (1) preprocessing clay mineral, including drying, smashing and sieving; (2) adding the sieved clay mineral into a molysite solution, and adding other metal salts, heating up the mixed turbid liquid to 30-90 DEG C and continuously stirring for 0.5-5 hours to make the liquid steady, adding alkali liquor to increase the pH value of the solution to 8-11, and stirring continuously for 0.5-2 hours; (3) separating, drying and smashing solid sediment, and executing thermal treatment, thereby obtaining the magnetic remediation material capable of magnetically separating the organic matter pollution in soil or water. As compared with the prior art, the remediation material provided by the invention has magnetic separability, can be recycled for cycle use, also has relatively high stability and catalytic activity, as well as good ecological compatibility, and is suitable for in-situ or ex-situ remediation of soil or water polluted by polycyclic aromatic hydrocarbon, polychlorinated biphenyl, Dioxin, organo-chlorine pesticides, and the like, and degradation intermediate products thereof.

Description

technical field [0001] The invention belongs to the technical field of soil / water pollution control of environmental engineering technology, and in particular relates to a magnetic restoration material polluted by organic matter in soil or water, a preparation method and an application. Background technique [0002] The current situation of surface water and soil pollution in my country is severe. Among them, persistent organic pollutants such as polycyclic aromatic hydrocarbons, pesticides, and antibiotic compounds have existed for a long time in the environment on which we live, and have accumulated to a certain extent. It will cause irreversible potential threats to the ecological environment and people's health. Polycyclic aromatic hydrocarbons are typical pollutants in my country, and most of them are carcinogenic, teratogenic, and mutagenic. The U.S. Environmental Protection Agency has included 16 kinds of polycyclic aromatic hydrocarbons in the list of priority polluta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/10B09C1/08C02F1/00
CPCB09C1/08C02F1/00H01F1/10
Inventor 龙明策金明杰苏寒瑞潘玥
Owner SHANGHAI JIAOTONG UNIV
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