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Preparation method and application of load type manganese ferrite adsorbing agent

A technology of manganese ferrite and adsorbent, which is applied in chemical instruments and methods, adsorption water/sewage treatment, alkali metal oxides/hydroxides, etc., can solve problems such as aminophenylarsine acid water pollution, achieve low cost, Reduce the difficulty and cost of operation, the effect of stable chemical properties

Inactive Publication Date: 2019-05-17
HUNAN AGRICULTURAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a loaded manganese ferrite adsorbent and a preparation method thereof in order to overcome the problem of water pollution caused by p-aminophenylarsine in the animal feed existing in the prior art. It has the advantages of large surface area, high surface active sites, and good chemical stability. At the same time, it has high adsorption efficiency and large adsorption capacity for p-aminophenylarsine

Method used

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  • Preparation method and application of load type manganese ferrite adsorbing agent
  • Preparation method and application of load type manganese ferrite adsorbing agent
  • Preparation method and application of load type manganese ferrite adsorbing agent

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preparation example Construction

[0031] In the first aspect, the present invention provides a preparation method of loaded manganese ferrite adsorbent. The method comprises:

[0032] (1) Distiller's grains are mixed in a mixed solution containing divalent manganese salt and ferric salt, and the mixing conditions make divalent manganese salt and ferric salt form manganese ferrite, which is loaded on the distiller's grain carrier to obtain Supported manganese ferrite adsorbent precursor;

[0033] (2) After the precursor of the loaded manganese ferrite adsorbent is dried and calcined, the loaded manganese ferrite adsorbent is obtained.

[0034] Preferably, the mixing conditions in step (1) include: pH 9-11, temperature 50-70°C, time 3-5h.

[0035] In the present invention, distiller's grains refer to residues left after brewing such as rice, wheat, and sorghum. In order to be more conducive to the adsorption on the distiller's grain carrier, the mixing process of distiller's grains with divalent manganese salt...

Embodiment 1

[0046] (1) Weigh 5g of distiller's grains and mix them with 100mL ultrapure water, stir at 25°C for 30min to disperse the distiller's grains completely and evenly in the water, then add 5.5g of MnSO 4 4H 2 O and 8g Fe 2 (SO 4 ) 3 Add it to distiller's grains water, and after all the solids are dissolved, adjust the pH value of the mixture to 10 with 5mol / L NaOH solution, and put the mixture in a 60°C drying oven to react for 4 hours;

[0047] (2) After separating the precipitate generated in the mixed solution (loaded manganese ferrite adsorbent precursor) from the mixed solution, wash and filter with ultrapure water several times, dry at 100°C for 24 hours, and 2 Under ambient conditions, put the precipitate in a quartz boat, put it into a tube furnace at a heating rate of 5°C / min and calcinate at 700°C for 1 hour to completely crystallize the metal;

[0048] (3) in N 2 After cooling the product obtained in step (2) to room temperature under ambient conditions, use an ag...

Embodiment 2

[0051] (1) Weigh 5g of distiller's grains and mix them with 100mL ultrapure water, stir at 25°C for 30min to completely and evenly disperse the distiller's grains in the water, then add 2.58g of MnSO 4 ·H 2 O and 14.8 g FeCl 3 ·6H 2 O was added to distiller's grains, and after all the solids were dissolved, the pH value of the mixed solution was adjusted to 9 with 5mol / L NaOH solution, and the mixed solution was put into a 50°C drying oven to react for 5 hours;

[0052] (2) After separating the precipitate (supported manganese ferrite adsorbent precursor) generated in the mixed solution from the mixed solution, wash and filter with ultrapure water several times, dry at 90°C for 30 h, and 2 Under ambient conditions, put the precipitate in a quartz boat, put it into a tube furnace with a heating rate of 5°C / min and calcinate at 600°C for 2h to completely crystallize the metal;

[0053] (3) in N 2 After cooling the product obtained in step (2) to room temperature under ambien...

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Abstract

The invention relates to the field of environmental protection, and discloses a preparation method and application of a load type manganese ferrite adsorbing agent. The preparation method of the loadtype manganese ferrite adsorbing agent comprises the following steps of: (1) mixing vinasse with a mixed solution containing bivalent manganese salts and trivalent iron salts; through the mixing condition, enabling the bivalent manganese salts and the trivalent iron salts to form manganese ferrite; loading the manganese ferrite onto the vinasse to obtain a load type manganese ferrite adsorbing agent precursor; (2) drying and roasting the load type manganese ferrite adsorbing agent precursor to obtain the load type manganese ferrite adsorbing agent. The adsorbing agent has the advantages that the magnetic characteristics are good; the specific surface area is great; the surface active sites are high; the chemical stability is high. Meanwhile, the adsorption efficiency on aminophenylarsonicacid is high; the adsorption capacity is great.

Description

technical field [0001] The invention relates to the field of environmental protection, in particular to a preparation method and application of a loaded manganese ferrite adsorbent. Background technique [0002] For a long time, the harm of arsenic in water to human health has been the focus of attention. Studies have shown that drinking water with low arsenic concentration for a long time will also lead to the occurrence of many diseases, so the removal of arsenic in water has always been a hot topic in the field of environmental research. At present, the methods for removing pollutants in wastewater mainly include: chemical precipitation or flocculation method, membrane technology, electrolytic reduction, catalytic degradation, ion exchange and adsorption method. Among them, the adsorption method is easy to operate, has various kinds of adsorbents and short operation period. , High processing efficiency and other advantages and are widely used. [0003] Among numerous ar...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/28C02F1/28C02F101/38
Inventor 周耀渝陈禹欣李培培吴世康杨远罗琳
Owner HUNAN AGRICULTURAL UNIV
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