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Composite adsorbing material for removing chloride ions in water and preparation method of composite adsorbing material

A composite adsorption material and chloride ion technology, applied in the field of composite adsorption materials and their preparation, can solve the problems of high cost and remarkable treatment effect, and achieve the effects of high crystallinity, increased specific surface area and pore volume

Inactive Publication Date: 2013-02-06
CHANGZHOU YAHUAN ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of high cost and remarkable treatment effect, and provide a composite adsorption material for removing chlorine ions in water and a preparation method thereof

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] First, put the natural hydrotalcite with a particle size of 0.05 mm in the reactor, wash it with deionized water, add 1.0 mol / L magnesium sulfate solution and 0.15 mol / L aluminum sulfate solution to mix, and keep stirring; boil the mixed solution for 5 hours Pour out the supernatant, wash with deionized water, add 0.8mol / L urea solution and continue to boil for 3h, discard the supernatant, wash with deionized water, and place it in an oven to dry at 60°C; The dried hydrotalcite is roasted in a roasting furnace at 450°C for 6 hours to obtain activated hydrotalcite, which is taken out and cooled at room temperature; Sodium acid to modify it.

[0022] Add the composite adsorbent material prepared by the above method into 1000 mg / L water containing chloride ions, the amount of the added adsorbent material is 2% of the water weight, and after 4 hours of adsorption, the chloride ion in the water is reduced from 800 mg / L to 400 mg / L The mg / L adsorption rate is 98%.

Embodiment 2

[0024] First, put the natural hydrotalcite with a particle size of 0.10 mm in the reactor, wash it with deionized water, add 1.2 mol / L magnesium sulfate solution and 0.20 mol / L aluminum sulfate solution, mix, and keep stirring; boil the mixed solution for 8 hours Pour out the supernatant, wash with deionized water, add 0.9mol / L urea solution and continue to boil for 5h, discard the supernatant, wash with deionized water, and place it in an oven to dry at 65°C; The dried hydrotalcite is placed in a roasting furnace at a temperature of 480°C for 8 hours to obtain activated hydrotalcite, which is taken out and cooled at room temperature; NaOH and 6g sodium lauryl sulfate to modify it.

[0025] Add the composite adsorbent material prepared by the above method into 1200 mg / L of water containing chloride ions, the amount of the added adsorbent material is 2% of the water weight, and after 4 hours of adsorption, the chloride ion in the water is reduced from 850 mg / L to 300 mg / L ads...

Embodiment 3

[0027] First, put the natural hydrotalcite with a particle size of 0.15 mm in the reactor, wash it with deionized water, add 1.5 mol / L magnesium sulfate solution and 0.30 mol / L aluminum sulfate solution to mix, and keep stirring; boil the mixed solution for 10 hours Pour out the supernatant, wash with deionized water, add 1.0mol / L urea solution and continue to boil for 8h, discard the supernatant, wash with deionized water, and place it in an oven to dry at 70°C; The dried hydrotalcite is roasted in a roasting furnace at 500°C for 10 hours to obtain activated hydrotalcite, which is taken out and cooled at room temperature; sodium lauryl sulfate, 4g sodium lauryl sulfate and 3g sodium stearyl polyoxyethylene ether sulfate to modify it.

[0028] Add the composite adsorbent material prepared by the above method into 1500 mg / L water containing chloride ions, the amount of the added adsorbent material is 2% of the water weight, and after 4 hours of adsorption, the chloride ion in t...

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Abstract

The invention discloses a composite adsorbing material for removing chloride ions in water and a preparation method of the composite adsorbing material. The preparation method comprises the following steps: firstly, washing hydrotalcite with ionized water, then adding 1.0-1.5mol / L magnesium sulfate solution and 0.15-0.30mol / L aluminum sulfate solution, continuously stirring, boiling for 5-10h, pouring out supernatant, washing with deionized water, then adding urea solution, continuously boiling for 3-8h, discarding the supernatant, washing with the deionized water, roasting for 6-10h in a roasting furnace at the temperature of 450-500 DEG C to obtain activated hydrotalcite, taking out and cooling, and finally modifying activated hydrotalcite with surfactant such as sodium hexadecyl benzene sulfonate and sodium lauryl sulfate. The preparation method is simple, wide in material sources, low in cost, simple in process flow, less in equipment investment, free from environment pollution, and high in dechlorination efficiency.

Description

technical field [0001] The invention relates to a composite adsorption material for removing chlorine ions in water and a preparation method thereof, belonging to the technical field of materials and environment. Background technique [0002] Chloride ion is the most common anion in water and wastewater. Excessively high concentration of chloride ion will cause bitter and salty drinking water, soil salinization, pipeline corrosion, difficult plant growth, and endanger human health. Therefore, chloride ion must be controlled emission concentration. The newly promulgated "Sewage Discharge Standards of Liaoning Province" proposes that the concentration of chloride ions in direct drainage shall not exceed 400 mg / L, and the concentration of chloride ions in wastewater discharged into the collection pipe network system shall not exceed 1000 mg / L. With the continuous improvement of people's attention to ecological environmental issues and environmental quality requirements, the in...

Claims

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Application Information

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IPC IPC(8): B01J20/08B01J20/30C02F1/28C02F1/58
Inventor 雷春生雷思宇
Owner CHANGZHOU YAHUAN ENVIRONMENTAL PROTECTION TECH
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