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Biological adsorbent, preparation method thereof, and application thereof to removal of methylene blue dye of waste water

A methylene blue dye and biosorbent technology, which is applied in the direction of adsorption water/sewage treatment, chemical instruments and methods, textile industry wastewater treatment, etc., can solve the problem of no use value of biomass slag, achieve high dye removal efficiency and excellent preparation process Simple, high removal rate effect

Inactive Publication Date: 2014-03-26
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

As the second largest product in the liquefaction reaction, liquefied biomass slag has been less studied. In the biomass liquefaction reaction, the structure of the biomass slag undergoes a huge change, and its shape is distorted and deformed. However, the original liquefaction thermochemical conversion technology is directly used The obtained biomass slag has no good utilization value

Method used

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  • Biological adsorbent, preparation method thereof, and application thereof to removal of methylene blue dye of waste water
  • Biological adsorbent, preparation method thereof, and application thereof to removal of methylene blue dye of waste water
  • Biological adsorbent, preparation method thereof, and application thereof to removal of methylene blue dye of waste water

Examples

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Embodiment 1

[0031] Crush the rice straw to 0.2-0.9 mm, then dry it at a constant temperature of 105°C for 24 hours, then mix 3.94g of dried rice straw with 100mL of ethanol, and place it in a high-pressure reactor for liquefaction reaction. The liquefaction pressure is 20.0 MPa and the temperature is 350°C. , and stay at 350°C for 10 minutes; finally, the liquefied slag obtained from the above liquefaction reaction was rinsed with acetone, vacuum filtered, dried, crushed, and passed through a 200-mesh sieve to obtain liquefied rice straw residue, that is, a biosorbent. Specific process such as figure 1 shown.

[0032] Add the above 10 mg of liquefied rice straw dregs to 20 mL of simulated wastewater with an initial concentration of methylene blue of 100 mg / L. The shaking reaction temperature is 30°C, the shaking reaction speed is 160 rpm, and the shaking reaction time is 12 hours. Shake each group of wastewater after the reaction to complete the removal of methylene blue in the wastewate...

Embodiment 2

[0035]The chlorella was crushed to 0.2-0.9 mm, and then dried at a constant temperature of 105 °C for 24 hours, then 3.94 g of dried chlorella was mixed with 100 mL of ethanol, and placed in a high-pressure reactor for liquefaction reaction. The liquefaction pressure was 5.0 MPa and the temperature was 350°C, and stay at 350°C for 30 minutes; finally, the liquefied slag obtained from the above liquefaction reaction is rinsed with acetone, vacuum filtered, dried, crushed, and passed through a 200-mesh sieve to obtain liquefied chlorella residue, which is a biosorbent.

[0036] Add 10 mg of the liquefied chlorella residue above to 20 mL of simulated wastewater with an initial methylene blue concentration of 100 mg / L. The shaking reaction temperature is 30 °C, the shaking reaction speed is 160 rpm, and the shaking reaction time is 12 h. Liquid separation of each group of wastewater after the above shaking reaction, to complete the removal of methylene blue in the wastewater. The ...

Embodiment 3

[0039] Crush the rice husks to 0.2-0.9mm, then dry at a constant temperature of 105°C for 24 hours, then mix 3.94g of dried rice husks with 100mL of water, and place them in a high-pressure reactor for liquefaction reaction. The liquefaction pressure is 10.0 MPa and the temperature is 260°C. , and stay at 260°C for 20 minutes; after the liquefaction is completed, the liquefied slag obtained from the above liquefaction reaction is rinsed with distilled water, vacuum filtered, dried, crushed, and passed through a 200-mesh sieve to obtain liquefied rice husk residue, that is, a biosorbent.

[0040] Add the above 10 mg of liquefied rice husk residue to 20 mL of simulated wastewater with an initial concentration of methylene blue of 100 mg / L. The shaking reaction temperature is 30°C, the shaking reaction speed is 180 rpm, and the shaking reaction time is 12 hours. After the reaction is completed, the solid-liquid separation Each group of wastewater after the above shaking reaction h...

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Abstract

The invention relates to the technical fields of biomass liquefied slag phase products and purification of waste water, in particular to a biological adsorbent, a preparation method thereof, and application thereof to removal of methylene blue dye of waste water. The biological adsorbent using biomass as a raw material is prepared through the following steps: crushing the biomass and drying the biomass to obtain dry biomass; performing liquefaction on the dry biomass to obtain liquefied slag; performing leaching, vacuum filtration, drying, crushing and sieving on the liquefied slag to obtain the biological adsorbent. The invention also provides a preparation method and application of the biological adsorbent. The biological adsorbent is low in production cost, and is high in removal rate and large in adsorption quantity when being used for removing the methylene blue dye from waste water.

Description

technical field [0001] The invention relates to the technical field of biomass liquefaction slag phase products and wastewater purification, in particular to a biosorbent, a preparation method and its application for removing methylene blue dye in wastewater. Background technique [0002] Dye wastewater has the characteristics of deep color, strong odor, high COD content, complex and changeable components, and contains a variety of substances that are highly toxic and difficult to degrade. Dyes in wastewater can absorb light, reduce water transparency, and consume a large amount of water. Oxygen, causing water hypoxia, destroying water self-purification and aquatic ecosystems. Methylene blue is a toxic triphenylmethane with metallic green crystals. It is often used as a dye in pottery, textile, leather and cytochemical dyeing industries. Methylene blue is used as a dyeing agent, and a large amount of methylene blue-containing wastewater is produced after dyeing. The waste...

Claims

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Application Information

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IPC IPC(8): B01J20/24B01J20/30C02F1/28C02F103/30
Inventor 袁兴中冷立健王侯肖智华吴志斌黄丹莲梁婕陈耀宁曾光明
Owner HUNAN UNIV
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