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Preparation method of modified magnalium binary hydrotalcites and application of modified magnalium binary hydrotalcites in absorbing bisphenol A in water body

An adsorption treatment and hydrotalcite technology, applied in the field of hydrotalcite, can solve the problems of difficulty in regeneration of adsorbents, high cost and high cost, and achieve the effects of low cost, increased adsorption performance, and reduced cost

Inactive Publication Date: 2011-08-31
长治学院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The main purpose of the present invention is to provide a reusable, low-cost and other technical problems in the prior art, such as the use of activated carbon, macroporous adsorption resin and other adsorbents to adsorb and treat bisphenol A in wastewater, which has the technical problems of difficult regeneration of the adsorbent and high cost. Preparation method of low-cost modified magnesium-aluminum binary hydrotalcite and its application in adsorption treatment of bisphenol A in water

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] The preparation method of modified magnesium-aluminum binary hydrotalcite: the magnesium-aluminum binary hydrotalcite [Mg 2+ 0.68 al 3+ 0.32 (OH) 2 ](Cl - ) 0.32 ·3H 2 O was calcined at 400°C for 4 hours to obtain magnesium-aluminum double metal oxide, which was dissolved in sodium lauryl sulfate aqueous solution according to 100% ion exchange capacity, and the pH value was adjusted to 9 with 0.01mol / L NaOH. 2 Stir for 42 hours under protection, filter, wash the precipitate, and then bake at 55°C to constant weight to prepare the modified magnesium-aluminum binary hydrotalcite.

[0014] The application of the modified magnesium-aluminum binary hydrotalcite prepared in this example in the adsorption treatment of bisphenol A in water: put the modified magnesium-aluminum binary hydrotalcite prepared above into the water containing bisphenol A, add chlorinated The concentration of sodium to sodium chloride in water is 0.01mol / L, the pH value of the water body is adju...

Embodiment 2

[0016] The preparation method of modified magnesium-aluminum binary hydrotalcite: the magnesium-aluminum binary hydrotalcite [Mg 2+ 0.65 al 3+ 0.35 (OH) 2 ](Cl - ) 0.35 2.7H 2 O was roasted at 450°C for 5 hours to obtain magnesium-aluminum double metal oxides, which were dissolved in sodium lauryl sulfate aqueous solution according to 100% ion exchange capacity, and the pH value was adjusted to 9.5 with 0.01mol / L NaOH. 2 Stir for 48 hours under protection, filter, wash the precipitate, and then bake at 60°C to constant weight to prepare the modified magnesium-aluminum binary hydrotalcite.

[0017] The application of the modified magnesium-aluminum binary hydrotalcite prepared in this example in the adsorption treatment of bisphenol A in water: put the modified magnesium-aluminum binary hydrotalcite prepared above into the water containing bisphenol A, add chlorine Sodium chloride until the concentration of sodium chloride in water is 0.05mol / L, adjust the pH value of th...

Embodiment 3

[0019] The preparation method of the modified magnesium-aluminum binary hydrotalcite in this embodiment is: the magnesium-aluminum binary hydrotalcite [Mg 2+ 0.67 al 3+ 0.33 (OH) 2 ](Cl - ) 0.33 2.9H 2 O was roasted at 500°C for 7 hours to prepare magnesium-aluminum double metal oxides, which were dissolved in an aqueous solution of sodium lauryl sulfate according to 100% ion exchange capacity, and the pH value was adjusted to 10 with 0.01mol / L NaOH. 2 Stir under protection for 54 hours, filter, wash the precipitate, and then bake at 65°C to constant weight to prepare the modified magnesium-aluminum binary hydrotalcite.

[0020] Application of the modified magnesium-aluminum binary hydrotalcite prepared in this example in the adsorption treatment of bisphenol A in water: put the modified magnesium-aluminum binary hydrotalcite prepared above into the water containing bisphenol A, add chlorine Sodium chloride to the concentration of sodium chloride in water is 0.1mol / L, a...

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Abstract

The invention belongs to the technical field of hydrotalcites, in particular relating to a preparation method of modified magnalium binary hydrotalcites and application of the modified magnalium binary hydrotalcites in absorbing bisphenol A in water body, aiming at solving the technical problems that the adsorbent is difficulty in regeneration, high in cost and the like since the bisphenol A in the waste water is absorbed and treated by the adsorbent such as the active carbon, the macroporous absorption resin and the like in the prior art. The preparation method of the modified magnalium binary hydrotalcites comprises the following steps: roasting the magnalium binary hydrotalcites at a temperature of 400-500 DEG C for 4-7 hours to obtain magnalium thermometal oxide, dissolving the obtained magnalium thermometal oxide into a lauryl sodium sulfate solution according to 100% of ion exchange capacity, adjusting the PH value to 9-10 by utilizing a NaOH solution, stirring for 42-54 hours in the presence of N2, filtering, washing, precipitating, and baking at the temperature of 55-65 DEG C until the weight is constant so as to obtain the modified magnalium binary hydrotalcites. The invention has the advantages that the hydrotalcites are reproduceable, the cost is low and the like.

Description

technical field [0001] The invention belongs to the technical field of hydrotalcites, and in particular relates to a preparation method of modified magnesium-aluminum binary hydrotalcites and its application in adsorption treatment of bisphenol A in water bodies. Background technique [0002] Bisphenol A (BPA), whose chemical name is 4-dihydroxydiphenylpropane, is an important chemical substance and an important fine chemical raw material in the production of plastic resin products. It is widely used in industrial and household products, and bisphenol A is also An endocrine disruptor, which has a certain impact on the endocrine system of animals and humans, and because bisphenol A has obvious lipophilicity, it is easy to accumulate in aquatic organisms, so it is widely used in urban sewage, industrial wastewater, sludge, soil, surface Bisphenol A is enriched in rivers and landfill leachate, threatening the health of people and organisms. Therefore, it is of great significan...

Claims

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Application Information

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IPC IPC(8): C01F7/00B01J20/06B01J20/30C02F1/28C02F101/34
Inventor 李燕毕浩宇毛晓明臧运波周成勇
Owner 长治学院