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Method of removing fluorescent whitening agent VBL in water body

A fluorescent whitening agent, -VBL technology, applied in the field of environmental science and engineering, can solve the problems of limited adsorption capacity, poor adsorption effect of fluorescent whitening agent wastewater, etc., and achieves a simple preparation process, low cost, and high adsorption capacity. Effect

Inactive Publication Date: 2017-09-15
SOUTH CHINA UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional adsorption materials such as activated carbon, natural minerals, and industrial waste residues all show a certain adsorption capacity for fluorescent whitening agent wastewater, but their adsorption capacity is limited, and the adsorption effect for low-concentration fluorescent whitening agent wastewater is not good.

Method used

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  • Method of removing fluorescent whitening agent VBL in water body
  • Method of removing fluorescent whitening agent VBL in water body
  • Method of removing fluorescent whitening agent VBL in water body

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Embodiment 1: prepare MIL-68 (Al) material

[0029] Dissolve 4.40g of aluminum chloride hexahydrate and 0.61g of terephthalic acid in 21mL of propanol, place in a reaction kettle and stir evenly, and the resulting reaction solution rises from 60°C to 140°C at a rate of 20°C / h. Keep the temperature at 140°C for 5h, then cool down to room temperature naturally. The filtered product was washed 3 times with deionized water for 2 hours each time, and calcined at 300° C. for 8 hours in a tube furnace to obtain a sample and mark it as MIL-68(Al).

Embodiment 2

[0030] Embodiment 2: MIL-68 (Al) is to the adsorption of fluorescent whitening agent-VBL in water

[0031] Take ten 250mL conical flasks, and add 100mL of 50mg / L fluorescent whitening agent-VBL solution to each conical flask. The aluminum-based metal-organic framework MIL-68(Al) material prepared in Example 1 was added to each set of Erlenmeyer flasks, and the amount of the material added to each Erlenmeyer flask was 20 mg. The adsorption was carried out in a constant temperature shaker at a temperature of 298K for different times, and the results are shown in figure 2 .

Embodiment 3

[0032] Embodiment 3: MIL-68 (Al) is to the adsorption of fluorescent whitening agent-VBL in water

[0033] Take 21 250mL Erlenmeyer flasks and divide them into three groups. The concentration gradient of fluorescent whitening agent-VBL solution in each group is 10, 20, 30, 40, 60, 80, 100mg / L, and the volume is 100mL. The aluminum-based metal-organic framework MIL-68(Al) material prepared in Example 1 was added to each Erlenmeyer flask in an amount of 20 mg. At 288K, 298K and 308K, the adsorption of different initial concentrations was carried out in a constant temperature shaker, and the results are shown in image 3 .

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Abstract

The invention belongs to the field of environmental science and engineering and discloses an application of removing fluorescent whitening agent VBL in water body. The application particularly includes the following steps: (1) preparing an aluminum based metal organic framework material MIL-68 (Al); (2) activating the MIL-68 (Al); (3) adding the MIL-68 (Al) in the step (2) to the water body containing the fluorescent whitening agent VBL according to the concentration of 0.05-0.5 g / L to obtain an adsorption initial solution; and (4) regulating the pH value of the adsorption initial solution to 2-11, and performing adsorption to obtain an adsorption purified solution. The method is simple and is easy to operate, is high in rate and efficiency on removal of the fluorescent whitening agent VBL, and has significant environmental value.

Description

technical field [0001] The invention belongs to the field of environmental science and engineering, and in particular relates to a method for rapidly removing fluorescent whitening agent-VBL in water by using aluminum-based metal organic framework MIL-68(Al). Background technique [0002] Fluorescent whitening agent-VBL (FWA-VBL) is a bis(triazine amino) type fluorescent whitening agent with unique properties and wide application. The shimmering effect of the stone makes the substance very white to the naked eye, achieving a whitening effect. It is widely used in papermaking, textile, washing and other industries. However, in the wastewater and water treatment industry, the production or use of FWA-VBL contains a large amount of fluorescent whitening agent, which is the main serious pollutant in water bodies. FWA-VBL is a typical aromatic hetero compound, which has strong biological toxicity, especially great damage to human liver, and its biodegradability is poor. FWA-VB...

Claims

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Application Information

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IPC IPC(8): C02F1/28B01J20/22B01J20/30C07C51/41C07C63/28C02F101/38
CPCB01J20/226C02F1/285C02F2101/308C02F2101/38C07C51/418C07C63/28
Inventor 程建华武士川罗紫芬
Owner SOUTH CHINA UNIV OF TECH
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