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Organic-inorganic heavy metal ion trapping agent and preparation method thereof

A heavy metal ion and capture agent technology, applied in chemical instruments and methods, water treatment of special compounds, water/sewage treatment, etc., can solve the problems of difficult degradation of monomer toxicity, high price of synthetic polymer treatment agents, and application limitations. Achieve the effects of improving adsorption performance, reducing production costs, and strong coordination

Pending Publication Date: 2022-02-08
铜陵晟泽环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, synthetic polymer treatment agents are expensive, and there are problems such as monomer toxicity and refractory degradation, which limit their application.

Method used

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  • Organic-inorganic heavy metal ion trapping agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A kind of preparation of organic-inorganic heavy metal ion scavenger, concrete steps are as follows:

[0031] (1) Preparation of organic activated montmorillonite:

[0032] A. Dissolve 5g of montmorillonite in 500ml of distilled water, mix thoroughly and then stir for 4 hours to form a 1g / ml suspension, add citric acid to control the acid concentration at 3%, stir and mix for 3 hours, filter and wash until After neutralization, freeze-dry to obtain acid-modified montmorillonite;

[0033] In this step, after the montmorillonite is dissolved in distilled water, ultrasonic treatment may be performed for 1 hour after stirring to obtain a montmorillonite dispersion.

[0034] The freeze-drying conditions of the acid-modified montmorillonite are as follows: freezing at -25°C for 24 hours, then drying for 48 hours.

[0035] B. Reconfigure the acidified montmorillonite into a 2g / ml montmorillonite suspension, add the silane coupling agent vinyltriethoxysilane to the suspension...

Embodiment 2

[0041] A kind of preparation of organic-inorganic heavy metal ion scavenger, concrete steps are as follows:

[0042] (1) 2g humic acid is dissolved in the volume concentration 10% acetic acid solution, obtains the acid-modified humic acid solution of 0.1g / ml; 5g montmorillonite is added in the step (2) humic acid solution, stir Evenly dispersed;

[0043] (2) graft copolymerization reaction:

[0044] Add 0.4g initiator ammonium persulfate to the above solution, then add 20g acrylamide, react at 60°C for 6 hours, then use acetone as a precipitant to precipitate and separate the product, and obtain an organic-inorganic grafted metal scavenger.

Embodiment 3

[0046] A kind of preparation of organic-inorganic heavy metal ion scavenger, concrete steps are as follows:

[0047] (1) Preparation of organic activated montmorillonite:

[0048]A. Dissolve 5g of montmorillonite in 500ml of distilled water, mix thoroughly and then stir for 4 hours to form a 1g / ml suspension, add citric acid to control the acid concentration at 3%, stir and mix for 3 hours, filter and wash until After neutralization, freeze-dry to obtain acid-modified montmorillonite;

[0049] The freeze-drying conditions of the acid-modified montmorillonite are as follows: freezing at -25°C for 24 hours, then drying for 48 hours.

[0050] B. Reconfigure the acidified montmorillonite into a 2g / ml montmorillonite suspension, add the silane coupling agent vinyltriethoxysilane to the suspension, and carry out water under the condition of 40-65°C while stirring. Thermal reaction, solid-liquid separation after the reaction is completed, washing, drying, to obtain organic activate...

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Abstract

The invention relates to an organic-inorganic heavy metal ion capturing agent and a preparation method thereof. The capturing agent is prepared by the following steps: taking organic activated montmorillonite and modified humic acid as raw materials, and subjecting the raw materials and polyacrylamide to a graft copolymerization reaction, to obtain the grafted organic-inorganic heavy metal ion capturing agent, wherein the organic activated montmorillonite is acid modified montmorillonite grafted by a silane coupling agent, and the modified humic acid is humic acid subjected to activating treatment by using a low-concentration acid solution. The metal trapping agent synthesized by the method disclosed by the invention is of an organic-inorganic composite grafted three-dimensional network structure, a chelating functional chain group is introduced through chemical reactions such as copolymerization or polycondensation, the trapping agent is endowed with more groups with a chelating function by acid-modified humic acid, and the chelation, flocculation and separation effects of the metal trapping agent on metal ions in a water body are improved. Other chemical reagents are replaced, the production cost is reduced, the reaction liquid in the preparation process is diluted acid, so that the corrosion to production equipment is avoided, and the secondary pollution is avoided.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to an organic-inorganic heavy metal ion scavenger and a preparation method thereof. Background technique [0002] Coal chemical industry uses coal as raw material, converts coal into gas, liquid and solid products through chemical processing, and then conducts further processing (fine chemical industry) to develop energy products and other processes. It mainly includes coal gasification, liquefaction, low temperature dry distillation, high temperature dry distillation and tar processing. Coal is a substance with extremely complex chemical composition, so the coal chemical process consumes a lot of water and also brings a lot of sewage. Coal chemical industry wastewater often contains dozens of inorganic and organic pollutants, including suspended solids, ammonia and ammonium salts, sulfides, heavy metals, easily degradable and refractory organic matter, and so on. Among th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/62
CPCC02F1/62C02F2305/04
Inventor 汪艳叶英桂
Owner 铜陵晟泽环保科技有限公司
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