Method for improving dye wastewater adsorptivity of hydroxyl iron pillared bentonite

A technology for adsorbing dyes and bentonite, which is applied in the direction of adsorption water/sewage treatment, separation methods, combustible gas purification/transformation, etc., can solve the problems of low adsorption capacity, affecting the speed of catalysis and degradation effect, etc., and achieve the purpose of increasing adsorption capacity, Improvement of processing efficiency and improvement of catalytic efficiency

Active Publication Date: 2011-10-19
溧阳常大技术转移中心有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the catalytic process, the effect of adsorption directly affects the speed of catalysis and the effect of degradation.
Generally, the maximum adsorption amount of iron pillared bentonite to methylene blue is 0.53 mmol / g, see "Oilfield Chemistry", 1999, 16 (3) 195-197, in practical application, the adsorption amount is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] The hydroxyl iron pillared bentonite powder prepared by the traditional method was acted under a magnetic field with a strength of 3000 gauss for 80 minutes, and the obtained hydroxyl iron pillared bentonite powder was added to the wastewater treatment containing golden orange II dye, and chlorine was added at the same time Sodium chloride, corresponding to every liter of dye wastewater, add 5 g of treated hydroxyl iron pillared bentonite and 1 mol of sodium chloride, stir for 30 minutes, precipitate and separate, analyze the concentration of remaining dye in the supernatant, after analysis, dye gold The removal rate of Orange II was 98.1%, and the adsorption capacity could reach 310 mg / g.

Embodiment 2

[0012] The hydroxyiron pillared bentonite powder prepared by the traditional method was subjected to a magnetic field with a strength of 4000 gauss for 40 minutes, and the obtained hydroxyiron pillared bentonite powder was applied to the treatment of wastewater containing golden orange G dye, and at the same time, chlorinated Sodium, corresponding to every liter of dye wastewater, add 4 g of treated hydroxyl iron pillared bentonite and 1 mol of sodium chloride, stir for 30 minutes, precipitate and separate, and analyze the concentration of remaining dye in the supernatant. After analysis, the dye golden orange The removal rate of II is 95.5%, and the adsorption capacity can reach 291 mg / g.

Embodiment 3

[0014] The hydroxyiron pillared bentonite powder prepared by the traditional method is subjected to a magnetic field with a strength of 4000 gauss for 40 minutes, and the obtained hydroxyiron pillared bentonite powder subjected to the magnetic field is applied to the wastewater treatment containing methylene blue dye, and sodium chloride is added at the same time. Add 1g of treated hydroxyl iron pillared bentonite and 0.5 mol of sodium chloride to each liter of dye wastewater, stir for 15-30 minutes, precipitate and separate, and analyze the concentration of remaining dye in the supernatant. After analysis, the dye Golden Orange II The removal rate is 96.4%, and the adsorption capacity can reach 305 mg / g.

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Abstract

The invention relates to a method for improving the dye waste water adsorptivity of hydroxyl iron pillared bentonite, comprising the following steps of: firstly, acting hydroxyl iron pillared bentonite powder prepared by adopting a traditional method under a magnetic field with the intensity of 3000-4000 gausses for 40-80 minutes; secondly, simultaneously adding the obtained hydroxyl iron pillared bentonite powder acted by the magnetic field and sodium chloride into dye wastewater for treatment, wherein 0.5-1mol of sodium chloride and 1-5g of the hydroxyl iron pillared bentonite powder acted by the magnetic field are added into each liter of dye wastewater; and finally, stirring for 15-30 minutes, precipitating and separating. The adsorbing capacity of the hydroxyl iron pillared bentonite on the dye is improved and the treatment efficiency of the dye wastewater is improved.

Description

technical field [0001] The invention relates to a method for improving the performance of water treatment materials, in particular to a method for adsorbing and treating the performance of dye wastewater by hydroxyl iron pillared bentonite, and belongs to the technical field of sewage treatment in environmental protection. Background technique [0002] With the development of my country's printing and dyeing industry, dye wastewater has become one of the main sources of water pollution in my country. At present, in addition to biological treatment, the commonly used treatment of printing and dyeing wastewater mainly uses adsorption treatment and chemical catalytic treatment. Bentonite has large reserves and low price in our country. The application of bentonite in the treatment of dye wastewater has attracted people's attention. In my country, calcium-based bentonite is mainly used, and its ion exchange performance is poor, so the effect of treating dye wastewater is not id...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/28B01J20/34
Inventor 马建锋李定龙崔冰莹
Owner 溧阳常大技术转移中心有限公司
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