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Preparation method of magnetic farmland heavy metal adsorbent

A magnetic adsorbent and heavy metal technology, which is applied in the direction of alkali metal compounds, chemical instruments and methods, alkali metal oxides/hydroxides, etc., can solve problems such as inability to perform adsorption functions, and achieve avoidance of photooxidation and good adsorption effects , Ease of recycling

Inactive Publication Date: 2021-02-26
苏州市相城环保技术有限公司 +1
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Problems solved by technology

Patent CN 102585420 A discloses a magnetic expansion adsorption composite material and its preparation method. The magnetic expansion adsorption composite material is prepared by polymerizing the magnetic separation body, non-metallic mineral powder and polymer monomer, but the surface of the active mineral is polymerized The polymer package generated by the reaction cannot perform the adsorption function

Method used

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Embodiment Construction

[0020] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below in conjunction with the best embodiments.

[0021] The present invention comprises the following steps:

[0022] 1) Preparation of core-shell structure: purchase nanometer ferric oxide with a particle size of 40-50nm, weigh 1.5 parts of ferric oxide, slowly insert 6 parts of glucose into ferric oxide, and put it into hydrothermal reaction In the kettle, the oven was heated to 180°C for 12 hours at a constant temperature to obtain carbon-coated ferric oxide;

[0023] 2) Prepare cross-linking agent by wrapping ferroferric oxide with carbon spheres and absorbing aluminum ions: use aluminum sulfate and aluminum chloride to prepare an aluminum solution with a weight concentration of 5-10%, add the above-mentioned carbon spheres to the aluminum solution, stir evenly, and let stand Adsorbed for 1h to...

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Abstract

The invention relates to a preparation method of a magnetic farmland heavy metal adsorbent. The preparation method comprises the following steps: preparing a core-shell structure; wrapping ferroferricoxide with carbon spheres to adsorb aluminum ions to prepare a cross-linking agent; synthesizing water-absorbing resin; using a freeze-drying method to remove the moisture in the polymer and preparing the resin foam, preparing the attapulgite slurry, and preparing the magnetic adsorbent. By adopting the magnetic adsorption resin, heavy metal ions in the farmland are absorbed and removed, the magnetic adsorption resin is high in stability and convenient to recycle, and the heavy metal contaminated farmland can be efficiently repaired in a high-standard mode.

Description

technical field [0001] The invention relates to the field of contaminated farmland remediation agents, in particular to a method for preparing a magnetic farmland heavy metal adsorbent. Background technique [0002] Pharmaceutical, chemical, papermaking wastewater, solid waste, etc. contain a large amount of toxic and harmful substances. Due to the neglect of environmental protection in the past, the random dumping of sewage and solid waste has caused a large amount of farmland pollution. Farmland pollution can be divided into organic pollution and inorganic pollution. Among inorganic pollution, farmland pollution caused by heavy metals accounts for a large proportion. [0003] Among the current heavy metal farmland pollution technologies, the common remediation technologies include phytoremediation and in-situ solidification and stabilization. Phytoremediation uses plants such as centipede grass and Sedum sedum to absorb and enrich heavy metals in the soil through plant gr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/28B01J20/26B01J20/30B09C1/00
CPCB01J20/28009B01J20/267B01J20/06B01J20/20B09C1/00
Inventor 秦艳涛刘和李守栋王国红
Owner 苏州市相城环保技术有限公司
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