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Preparation method and application method of adsorbent for treating reactive dye wastewater

A technology of reactive dyes and application methods, which is applied in the field of wastewater treatment technology and environmental protection, can solve the problems of regeneration, large amount of sludge, and high cost, and achieve the effect of enhanced ability, good adsorption characteristics, and high-efficiency adsorption

Active Publication Date: 2017-11-07
INNER MONGOLIA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the commonly used dye wastewater treatment methods include chemical oxidation method, flocculation precipitation method, ion exchange method, activated carbon adsorption method, ultrafiltration membrane filtration method and biodegradation method, etc., but these methods are due to high cost, large amount of sludge, low efficiency and It is difficult to be widely used due to the need for regeneration after use, so finding an efficient, energy-saving, and green method is currently a hot spot in the field of dye wastewater treatment at home and abroad.

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  • Preparation method and application method of adsorbent for treating reactive dye wastewater
  • Preparation method and application method of adsorbent for treating reactive dye wastewater
  • Preparation method and application method of adsorbent for treating reactive dye wastewater

Examples

Experimental program
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Effect test

Embodiment 1

[0034] A kind of adsorbent preparation method for treating reactive dye wastewater, its implementation steps are as follows:

[0035] The first step is to wash the discarded blast furnace water-quenched slag with tap water, and then continue to wash with distilled water to remove surface impurities and then filter and separate; then put it in a blast drying oven and dry it at 100-105 °C for 24 hours; finally, dry the The blast furnace water-quenched slag is mechanically crushed, passed through a 100-mesh sieve, and the under-sieve is taken, and put into a dryer for subsequent use;

[0036] In the second step, take 10 g of blast furnace water-quenched slag obtained in the first step, add 100 ml of cetyltrimethylammonium bromide with a concentration of 0.008 mol / L, and shake at a constant temperature in a water bath at 25 °C and 120 r / min The product was obtained by continuous shaking in a vacuum cleaner for 24 h; the product was repeatedly washed with deionized water to neutral...

Embodiment 2

[0042] A kind of application of reactive dye wastewater adsorbent, the steps are: the adsorbent 1 ~ 16 g / L prepared by embodiment 1 is added 50 ml concentration is 40 mg / L, and the solution ion strength is the reactive brilliant red of 0 mol / L In the waste water, shake at 25 °C, pH value is 2, rotation speed is 120 rpm, time is 60 min, after the reaction is completed, the adsorbent is separated from solid and liquid.

[0043] Measure the concentration of reactive brilliant red in the wastewater after separation, calculate the removal rate and adsorption capacity, see Figure 5 , Figure 5 It is a schematic diagram of the effect of adsorbent dosage on the adsorption effect of reactive brilliant red. Depend on Figure 5 It can be seen that when the dosage of adsorbent increases from 1 g / L to 8 g / L, the removal rate of reactive brilliant red also increases from 27.34% to 92.04%. When the dosage exceeds 8 g / L, the removal rate of The rate increases slowly, and the curve tends t...

Embodiment 3

[0045] The adsorbent of the present invention has the removal rate of reactive brilliant red wastewater under different pH conditions. Add 8 g / L of the adsorbent prepared in Example 1 to 50 ml of reactive brilliant red wastewater with a concentration of 40 mg / L and a solution ionic strength of 0 mol / L, shake at 25 °C, and the pH value is 2 to 12 , the rotation speed is 120 rpm, and the time is 60 min. After the reaction is completed, the adsorbent is separated from the solid and liquid.

[0046] Measure the concentration of reactive brilliant red in the wastewater after separation, calculate the removal rate and adsorption capacity, see Figure 6 , Figure 6 It is a schematic diagram of the influence of pH on the adsorption effect of reactive brilliant red. Depend on Figure 6 It can be seen that with the increase of pH, both the removal rate and the adsorption amount show a downward trend. When the pH is 2, the maximum removal rate and adsorption amount are 95.55% and 4.78...

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Abstract

The invention relates to a preparation method and an application method of an adsorbent for treating reactive dye wastewater. The preparation method of the adsorbent comprises the steps as follows: blast furnace water-quenched slag is taken as a raw material, the raw material is subjected to pretreatment including washing, drying, crushing, sieving and the like, then, the pretreated blast furnace water-quenched slag is added to a CTAB (cetyl trimethyl ammonium bromide) solution for oscillation, a mixed solution is filtered, a filtered material is washed and dried, and the absorbent is obtained. According to the method for removing reactive dye in wastewater by the aid of the adsorbent, the adsorbent is uniformly mixed with the reactive dye wastewater, oscillation reaction and solid-liquid separation are performed, the reactive dye is removed, and the adsorbent is separated. The preparation method and the application method have the advantages that raw materials of the adsorbent are abundant and low in cost; the preparation process of the adsorbent is convenient and feasible; the adsorption rate is high, the removal rate is high and the like. Therefore, the modified blast furnace water-quenched slag absorbent is an economical, environment-friendly and efficient adsorbent, and waste recycling and treatment of waste with waste are realized.

Description

technical field [0001] The present invention relates to a preparation method and application of an adsorbent, more specifically to a preparation method of a modified blast furnace water-quenched slag adsorbent, and a method for using the adsorbent to treat reactive dye wastewater, belonging to wastewater treatment technology and environmental protection technology field. Background technique [0002] Dyeing, textile, printing, papermaking and other industries have developed rapidly in recent years, and dye wastewater has become one of the key pollution sources of water environment, which has aroused widespread concern. At present, there are about 10,000 kinds of dyes available in the world, and about 700,000 tons of dyes are used every year. It is estimated that 10-15% of the used dyes are discharged into the water body, because the dyes in the wastewater can absorb light, reduce the penetration ability of light, interfere with photosynthesis and self-purification ability o...

Claims

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Application Information

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IPC IPC(8): B01J20/30B01J20/22C02F1/28C02F103/28C02F103/30
CPCB01J20/22B01J2220/4887C02F1/285C02F2101/308C02F2103/28C02F2103/30
Inventor 王哲姜庆宏张凯陈莉荣张思思
Owner INNER MONGOLIA UNIV OF SCI & TECH
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