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Synthesis method of bentonite loaded iron carbonyl adsorbent

A synthesis method and technology of bentonite, applied in chemical instruments and methods, adsorption water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problem that the surface of hydroxyl iron cannot be fully utilized, lower utilization efficiency, slow mass transfer, etc. problems, to achieve the effect of reducing dosage, improving utilization rate and promoting adsorption speed

Active Publication Date: 2014-08-06
南通豫湖机械有限公司
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

Hydroxyl iron supported by bentonite can effectively adsorb phosphate, but there are some problems: for example, after bentonite loads hydroxyl iron to the interlayer, although the interlayer distance will increase somewhat, there is still the problem of slow mass transfer, resulting in Can not be fully utilized, which reduces the utilization efficiency

Method used

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  • Synthesis method of bentonite loaded iron carbonyl adsorbent
  • Synthesis method of bentonite loaded iron carbonyl adsorbent

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Embodiment 1

[0017] Under the condition of stirring in a water bath at 50°C, add 0.3 mol / L NaOH solution dropwise to the ferric nitrate solution with a concentration of 1 mol / L. － / Fe 3+ =1.5, the product was aged at room temperature for 10 hours to obtain a hydroxy-iron pillar solution; the hydroxy-iron pillar solution was diluted 10 times to obtain a diluted hydroxy-iron pillar solution; dried and crushed bentonite with a 40 mesh sieve was added to the diluted hydroxy-iron pillar solution In the solution, add 3g of bentonite per milliliter of dilute hydroxyl iron pillar solution, stir for 1h, precipitate and separate, and add the solid part into the tetramethylammonium chloride solution with a concentration of 30mmol / L, and each gram of bentonite (dry weight) corresponds to 5 ml of tetramethylammonium chloride solution, stirred for 2 hours, washed with deionized water three times, and dried at 70°C to constant weight; 20 g of the dried product was placed in a microwave oven, and irradiat...

Embodiment 2

[0020] 0.5mol / L Na 2 CO 3 The solution is added dropwise to the ferric nitrate solution with a concentration of 1mol / L, and at the end of the addition, Na + / Fe 3+ =2.5, the product was aged at room temperature for 48 hours to obtain a hydroxy-iron pillar solution; the hydroxy-iron pillar solution was diluted 15 times to obtain a dilute hydroxy-iron pillar solution; the bentonite that was dried and crushed through a 100 mesh sieve was added to the dilute hydroxy-iron pillar In the solution, add 2g of bentonite per milliliter of dilute hydroxyl iron pillar solution, stir for 2h, precipitate and separate, and add the solid part into the tetramethylammonium chloride solution with a concentration of 30mmol / L, and each gram of bentonite (dry weight) corresponds to 10 ml of tetramethylammonium chloride solution, stirred for 4 hours, washed 5 times with deionized water, dried at 80°C to constant weight; 50 g of the dried product was placed in a microwave oven, and irradiated with m...

Embodiment 3

[0023] 0.4mol / L Na 2 CO 3 The solution is added dropwise to the ferric nitrate solution with a concentration of 2mol / L, and at the end of the addition, Na + / Fe 3+ =2.4, the product was aged at room temperature for 24 hours to obtain a hydroxyiron pillar solution; the hydroxyiron pillar solution was diluted 15 times to obtain a dilute hydroxyiron pillar solution; the bentonite that was dried and crushed through a 100 mesh sieve was added to the dilute hydroxyiron pillar solution In the solution, add 3g of bentonite per milliliter of dilute hydroxyl iron pillar solution, stir for 2h, precipitate and separate, and add the solid part into the tetramethylammonium chloride solution with a concentration of 100mmol / L, and each gram of bentonite (dry weight) corresponds to 10 ml of tetramethylammonium chloride solution, stirred for 4 hours, washed 5 times with deionized water, dried at 80°C to constant weight; 50 g of the dried product was placed in a microwave oven, and irradiated ...

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Abstract

The invention discloses a synthesis method of a bentonite loaded iron carbonyl adsorbent. The synthesis method comprises the following steps: dropwise adding a NaOH or Na2CO3 solution into a ferric nitrate solution under water bath stirring condition, aging a product after ending the dropwise adding, diluting hydroxyl, then adding bentonite powder, stirring and separating sediment, adding the solid part into a tetramethylammonium chloride solution, stirring, washing and drying; putting the dried product in a microwave oven and irradiating the product for 3-6 minutes by using microwave; and finally adding the product irradiated by the microwave into a lithium chloride solution, stirring, separating sediment, washing and drying to obtain the bentonite loaded iron carbonyl adsorbent. The synthesis method has the advantage that the microwave is used for decomposing interlayer organic matters and breaking a layer structure of the bentonite to form a sawtooth structure, so that hole diameter is increased, thereby effectively increasing the adsorption speed of the iron carbonyl.

Description

technical field [0001] The invention relates to the field of new materials for environmental pollution control, in particular to a synthesis method of a bentonite-loaded hydroxyl iron adsorbent. Background technique [0002] Eutrophic pollution is the pollution caused by the eutrophication of aquatic ecosystems. Eutrophication refers to the excessive growth of aquatic plants (phytoplankton algae, etc.) caused by excessive nutrients in the water body, especially the excess nitrogen and phosphorus, which affects the normal oxygen exchange between the water body and the atmosphere, and the decomposition of dead algae consumes a large amount of oxygen, resulting in The dissolved oxygen in the water body drops rapidly, the water quality deteriorates, and fish and other organisms die in large numbers, which accelerates the aging process of the water body. Elements such as nitrogen and phosphorus in wastewater have seriously polluted surface water bodies. To effectively remove ph...

Claims

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Application Information

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IPC IPC(8): B01J20/12B01J20/30C02F1/28C02F1/58
Inventor 马建锋李良银姚超
Owner 南通豫湖机械有限公司
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