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Carbon/hydrotalcite composite adsorption agent, preparation of carbon/hydrotalcite composite adsorption agent, application to heavy metal adsorption and regeneration method

A composite adsorption and hydrotalcite technology, applied in chemical instruments and methods, separation methods, filter regeneration, etc., can solve the problems of poor removal rate, difficult recycling and regeneration, low adsorption capacity, etc., and achieve effective regeneration and recovery, excellent adsorption effect. Effect

Active Publication Date: 2019-03-26
CENT SOUTH UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] In order to solve the shortcomings of the existing carbon / hydrotalcite composite adsorbent in terms of heavy metal adsorption, such as poor removal rate, low adsorption capacity, and difficulty in recycling, the first purpose of the present invention is to provide a carbon / hydrotalcite composite adsorbent, which aims to Improve the performance of the composite adsorbent material in terms of heavy metal adsorption, in addition to significantly improving its recycling effect

Method used

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  • Carbon/hydrotalcite composite adsorption agent, preparation of carbon/hydrotalcite composite adsorption agent, application to heavy metal adsorption and regeneration method
  • Carbon/hydrotalcite composite adsorption agent, preparation of carbon/hydrotalcite composite adsorption agent, application to heavy metal adsorption and regeneration method
  • Carbon/hydrotalcite composite adsorption agent, preparation of carbon/hydrotalcite composite adsorption agent, application to heavy metal adsorption and regeneration method

Examples

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Effect test

Embodiment 1

[0082] The camellia husk powder sieved through 120 mesh was dried for later use, and a mixed solution of potassium ferrate and ferric chloride (molar ratio 2:1) with a total mass fraction of 5% was prepared. Take 3g of camellia oleifera husk powder, add 150ml of the prepared mixed solution into a conical flask, and shake for 12h. After 12h, the mixture was filtered and dried at 80°C; then the mixture was burned in a tube furnace at 500°C for 4h. After cooling to room temperature, wash with water repeatedly, and dry to obtain magnetic biochar.

[0083] CO was prepared by hydrothermal method 3 - MgFe hydrotalcite-coated magnetic biochar composite adsorbent. Weigh 0.8g of magnesium chloride and 0.5g of ferric chloride and dissolve in 80ml of water, stir for 10min; add 1g of magnetic biochar, drop in a mixed solution with a total concentration of 0.5mol / L sodium carbonate and sodium hydroxide (molar ratio 1:1) Adjust the pH to 10, then transfer the solution to a polytetrafluoro...

Embodiment 2

[0086] Compared with Example 1, the main difference is that the concentration of potassium ferrate and ferric chloride is 2%, specifically as follows:

[0087] The camellia husk powder sieved through 120 meshes was dried for later use, and a mixed solution of potassium ferrate and ferric chloride (molar ratio 2:1) with a total mass fraction of 2% was prepared. Take 3g of camellia oleifera husk powder, add 150ml of the prepared mixed solution into a conical flask, and shake for 12h. After 12h, the mixture was filtered and dried at 80°C; then the mixture was burned in a tube furnace at 500°C for 4h. After cooling to room temperature, wash with water repeatedly, and dry to obtain magnetic biochar.

[0088] CO was prepared by hydrothermal method 3 - MgFe hydrotalcite-coated magnetic biochar composite adsorbent. Weigh 0.8g of magnesium chloride and 0.5g of ferric chloride and dissolve in 80ml of water, stir for 10min; add 1g of magnetic biochar, drop in a mixed solution with a t...

Embodiment 3

[0091]Compared with Example 1, the main difference is that the mol ratio of potassium ferrate to ferric chloride is 1:1, specifically as follows:

[0092] The camellia husk powder sieved through 120 meshes was dried for later use, and a mixed solution of potassium ferrate and ferric chloride (molar ratio 1:1) with a total mass fraction of 5% was prepared. Take 3g of camellia oleifera husk powder, add 150ml of the prepared mixed solution into a conical flask, and shake for 12h. After 12h, the mixture was filtered and dried at 80°C; then the mixture was burned in a tube furnace at 500°C for 4h. After cooling to room temperature, wash with water repeatedly, and dry to obtain magnetic biochar.

[0093] CO was prepared by hydrothermal method 3 - MgFe hydrotalcite-coated magnetic biochar composite adsorbent. Weigh 0.8g of magnesium chloride and 0.5g of ferric chloride and dissolve in 80ml of water, stir for 10min; add 1g of magnetic biochar, drop in a mixed solution with a total ...

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Abstract

The invention belongs to an adsorption material, and concretely discloses a carbon / hydrotalcite composite adsorption agent. The carbon / hydrotalcite composite adsorption agent comprises a carbon substrate and carbonate and hydroxyl double-intercalating hydrotalcite carried on the surface of the carbon substrate. The invention also discloses a preparation method of the carbon / hydrotalcite compositeadsorption agent. The method comprises the following steps of putting a raw material solution containing a carbon substrate and raw materials of ion sources, carbonate sources and hydroxyl sources forsynthesizing hydrotalcite into a sealed container; performing aging at 90 to 130 DEG C; preparing the carbon / hydrotalcite composite adsorption agent. The preparation process is simple; the operationis easy; the prepared magnetic composite adsorption agent can realize the fast separation under the external magnetic field conditions. The adsorption material belongs to a novel environment functional material, and can be widely applied to the treatment of domestic wastewater and industrial waste water.

Description

technical field [0001] The invention belongs to the field of environmental functional materials, in particular to a carbon-loaded hydrotalcite composite adsorbent. Background technique [0002] In the era of advanced science and technology, people are facing the ecological crisis of environmental pollution, which is particularly harmful to human health. Among them, the pollution of wastewater containing heavy metals and organic matter from industries such as electrolysis, dyes, and leather has caused serious damage to the ecosystem and threatened people's health. Therefore, how to remove pollutants in wastewater is particularly important in water pollution control. [0003] The adsorption method has become the most promising method in wastewater treatment because of its high purification efficiency, no secondary pollution, high operational activity, and low cost. At present, the price of adsorbents used to purify heavy metals is relatively high. The development of low-cost...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/08B01J20/06B01J20/04B01J20/28B01J20/30B01J20/34C02F1/28C02F101/20
CPCB01J20/043B01J20/06B01J20/08B01J20/20B01J20/28009B01J20/3085B01J20/3416B01J20/3475B01J2220/4875C02F1/288C02F2101/20C02F2303/16
Inventor 符剑刚黄叶钿贾阳张文婷刘畅
Owner CENT SOUTH UNIV
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