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Method for adsorbing heavy metals through Fe3O4/CD (cyclodextrin)-G-PANI (polyaniline) composite

A technology of CD-G-PANI and composite materials, which is applied in the field of heavy metal adsorption, can solve the problems of Fe3O4/CD-G-PANI, etc., and achieve good recycling performance, improved adsorption capacity, and good removal performance.

Inactive Publication Date: 2017-10-10
SHAOXING UNIVERSITY
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  • Abstract
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Problems solved by technology

Based on our research, there is no research on Fe3O4 / CD-G-PANI for environmental pollution control

Method used

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Embodiment Construction

[0019] The preferred embodiments of the present invention are described below, and it should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0020] The present invention relates to a kind of Fe 3 o 4 / CD-G-PANI composite material is used for the method for heavy metal adsorption, is characterized in that: comprise the following steps:

[0021] In the first step, the Fe 3 o 4 / Suspension of CD-G-PANI composites and NaNO 3 The solution was mixed and pre-balanced for 24 hours in advance, and then added to the heavy metal ion wastewater, so that the concentration of each component reached the preset value.

[0022] In the second step, by dropping a trace amount of HNO with a concentration of 0.01mol / L in the mixed solution 3 Or NaOH solution, adjust the pH to the required value with the help of a Mettler acidity meter, wherein the pH value is 2-11...

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Abstract

The invention discloses a method for adsorbing heavy metals through a Fe3O4 / CD (cyclodextrin)-G-PANI (polyaniline) composite. The method comprises steps as follows: step one, a suspension of the Fe3O4 / CD-G-PANI composite and a NaNO3 solution are mixed in advance and pre-balanced for 24 h, and then, heavy metal ion wastewater is added; step two, a trace of a HNO3 or NaOH solution is dropwise added to the mixed solution; step three, the mixture is stirred mechanically for 24 h, so that the adsorption reaction is in a balanced state; step four, solid and liquid separation is performed; step five, solid parts are repeatedly leached until no Cu or Zn is detected in a leachate; step six, remaining Fe3O4 / CD-G-PANI colloids are collected and put in an oven, the next round of adsorption / desorption operation is performed after drying, and the process is performed eight times to realize repeated utilization. The method is low in cost, environment-friendly and high in repeated utilization rate and also has high purification efficiency for Cu-containing and Zn-containing urban sewage.

Description

technical field [0001] The invention relates to a method for Fe3O4 / CD-G-PANI composite material to be used for heavy metal adsorption. Background technique [0002] With the development of the economy, various industrial and agricultural production processes discharge a series of toxic and harmful heavy metal ions into the soil, surface water and groundwater systems, causing serious environmental pollution. Copper (Cu) and zinc (Zn), as common divalent heavy metal ions, are widely used in industries such as metallurgy, electrolysis, electroplating, paint, machinery, ceramics and electronics. It will inevitably be released into the environment during the application process, and finally enter the human body through the food enrichment effect of the biological chain, causing serious health hazards. According to environmental quality standards, for the stability of the ecosystem and the health of organisms, effective methods must be adopted to strictly control the concentratio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/34C02F1/28C02F101/20
CPCB01J20/34C02F1/288C02F2101/20
Inventor 胡保卫胡清远吴思颖宋远志
Owner SHAOXING UNIVERSITY
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