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Iron carbon material and preparation method and application thereof

A technology of iron carbon and activated carbon, which is applied in the field of water treatment, can solve the problems of short half-life, easy failure, loss of water purification function, etc., and achieve the effect of accelerating the reduction and degradation speed, increasing the removal capacity, and avoiding secondary pollution

Inactive Publication Date: 2015-08-26
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the strong reducibility of nano-zero-valent iron, it is easy to be oxidized, so the half-life is short, and it is easy to fail and lose the function of water purification, so it has a small bromate removal capacity.

Method used

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  • Iron carbon material and preparation method and application thereof
  • Iron carbon material and preparation method and application thereof
  • Iron carbon material and preparation method and application thereof

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preparation example Construction

[0052]

[0053] A preparation method of iron-carbon material, comprising:

[0054] (1), an activation process for activating granular activated carbon;

[0055] (2), the preparation process of preparing iron carbon material by adopting inorganic iron salt and activated granular activated carbon.

[0056] Wherein, the activation procedure of step (1) can adopt any one of boiling water activation method, ultrasonic activation method and nitric acid activation method.

[0057] The boiling water activation method comprises the following steps:

[0058] a1. Mix granular activated carbon with deionized water, heat to boiling state and keep it for 20-30 minutes;

[0059] a2. Naturally cool to room temperature and place for 5-8 hours;

[0060] a3. Take the precipitate and wash it with deionized water for 2 to 4 times;

[0061] a4. Dry to constant weight at 110-130°C to obtain activated granular activated carbon, and put it into a ground-mouth bottle for later use.

[0062] The ...

Embodiment 1

[0076] This embodiment provides an iron-carbon material for reducing and degrading bromate contained in water. The iron-carbon material contains activated carbon and nano-hydroxy iron loaded on the activated carbon, and the nano-hydroxy iron is FeOOH. The mass ratio of activated carbon to nano-hydroxy iron is 1:2.5.

[0077] Among them, this embodiment uses FeSO 4 ·7H 2 O impregnated granular activated carbon prepared as an example to illustrate the nano-hydroxy iron. The bromate removal capacity of nano-hydroxy iron with different iron content is as follows: Figure 7 shown. Figure 7 Denotes the adsorption isotherms of GAC and Fe‐GAC with different iron contents for the removal of bromate after 72 h. Figure 7 The abscissa of represents the initial bromate concentration (Initial bromate concentration), the unit is mmol / L. Figure 7 The vertical axis of represents bromate removal capacity (Bromate removal). From Figure 7 It can be seen that when the iron content is 1...

Embodiment 2

[0079] This embodiment provides a method for preparing an iron-carbon material, which is used to prepare the iron-carbon material in Example 1. This preparation method comprises the steps:

[0080] (1) Mix granular activated carbon with deionized water, heat to boiling state and keep for 35 minutes, cool to room temperature naturally and leave for 6 hours, take the precipitate and wash it with deionized water for 3 times, dry at 120°C to constant weight, The activated granular activated carbon is obtained.

[0081] (2) Mix the inorganic iron salt and the activated granular activated carbon at a mass ratio of 1:2.5, heat at 120°C for 24 hours under the infiltration of deionized water, and wash with deionized water until the cleaned liquid becomes clear , to obtain iron-carbon material after drying.

[0082] Wherein, in the heating process of step (2), it should be ensured that the deionized water does not completely evaporate to dryness, that is, it should be ensured that a w...

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Abstract

The invention provides an iron carbon material and a preparation method and an application thereof. The iron carbon material comprises active carbon and nanometer iron carbonyl loaded on the active carbon, and the mass ratio of the nanometer iron carbonyl to the active carbon is 1: (1-5). By means of the iron carbon material, bromate in water can be reduced and degraded into bromide ions, and accordingly, the bromate in water can be removed, and secondary pollution to water is prevented.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and relates to an iron-carbon material and a preparation method and application thereof. Background technique [0002] Bromate is an oxidized pollutant formed by the oxidation of bromide ions in water by ozone, which widely exists in natural water bodies. Bromate has carcinogenic, teratogenic, mutagenic and teratogenic effects and a variety of toxicity. It will not only pollute the ecological environment, but also have toxic effects on humans, and even induce various diseases in humans. Therefore, in order to control the pollution of bromate in water, the Environmental Protection Agency has made restrictive regulations on the concentration of bromate in drinking water, generally stipulating that the concentration of bromate in water should not exceed 10 μg / L. [0003] In order to remove bromate in water, the existing technology has adopted a variety of methods to reduce and degrade broma...

Claims

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Application Information

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IPC IPC(8): C02F1/70C02F1/28C02F1/58
Inventor 许建红
Owner TONGJI UNIV
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