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Modified zeolite-iron oxide mixed soil in-situ repairing agent and preparation method thereof

An in-situ remediation agent and iron oxide technology, which is applied in the field of soil remediation, can solve the problems of land occupation and adverse environmental impact, and achieve the effects of low price, improved adsorption efficiency, and enhanced adsorption capacity

Inactive Publication Date: 2018-04-20
MAANSHAN JUNJUN FOOD TECH
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AI Technical Summary

Problems solved by technology

In the process of urban construction and building demolition, a large amount of fly ash waste bricks will be produced. These wastes will accumulate in large quantities, not only occupying land, but also adversely affecting the environment.

Method used

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Experimental program
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Embodiment Construction

[0020] A modified zeolite iron oxide composite soil in-situ remediation agent, prepared by the following method:

[0021] (1) Crush the zeolite through a 40-mesh sieve, immerse it in a sulfuric acid solution with a volume concentration of 5% for 20 hours, then take it out and wash it with water, steam it at 150°C for 10 hours, and then dry it at 100°C to obtain zeolite powder spare;

[0022] (2) Retting and fermenting animal excrement until fully decomposed, drying and pulverizing into fine particles, mixing with zeolite powder at a mass ratio of 3:1, putting it into water 25 times its mass, and then adding 1% sulfuric acid of the total mass to it For copper, heat up to 80°C and react for 40 minutes, collect the solid after filtration, wash with water until the pH is 6.5, and dry for later use;

[0023] (3) Mix 0.5mol / L magnesium sulfate solution and 1mol / L sodium hydroxide solution in equal volumes, stir for 10 minutes, then add magnesium sulfate powder to it, heat at 110°C ...

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Abstract

The invention discloses a modified zeolite-iron oxide mixed soil in-situ repairing agent and preparation method thereof. The modified zeolite-iron oxide mixed soil in-situ repairing agent is made of zeolite, organic matters, ferric chlorides, coal ashes and other raw materials and mixes with water to form nano-iron oxides, and further mixes with a mixed system of organic matters and zeolite whichare low in price and easy to get on this basis to shape multi-polymers; and interior microcellular structure can be retained to improve absorbability to soil pollutants, through cooperative combination of the interior microcellular structure and the absorbability, specific surface area is greatly increased, pollutant-absorbing species are enlarged, and the absorbing efficiency for heavy metals isimproved. The modified zeolite-iron oxide mixed soil in-situ repairing agent uses raw materials which are rich in reserves and cheap in price, finished products are high in reliability and has a goodgeneralizing potential at home and abroad, and particularly has a wide application prospect to composite type soil pollution of the heavy metals and the organics.

Description

technical field [0001] The invention relates to the technical field of soil remediation, in particular to a modified zeolite-iron oxide composite soil in-situ remediation agent and a preparation method thereof. Background technique [0002] With the process of industrialization, urbanization and modern agriculturalization in our country, soil pollution is becoming more and more serious, and it gradually manifests as compound pollution of various pollutants. In particular, heavy metal pollution and highly toxic and persistent organic pollution are the most prominent. They mainly come from abandoned factories and mines, sewage irrigation areas, domestic garbage, industrial waste, and the extensive use of pesticides and fertilizers. Investigations and studies have shown that heavy metal pollution such as cadmium, arsenic, and lead in my country has caused huge economic losses. On the other hand, organic pollution has become a current research hotspot due to its persistent, hig...

Claims

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Application Information

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IPC IPC(8): B09C1/00
Inventor 何松
Owner MAANSHAN JUNJUN FOOD TECH
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