A kind of bagasse-based anionic adsorbent and its preparation method and application

A sugarcane bagasse and anion technology, which is applied in the field of biomass materials and adsorption and separation, can solve the problems of non-single components, difficult to use, environmental pollution, etc., and achieve the effects of high production efficiency, good waste treatment and low price.

Inactive Publication Date: 2019-07-23
WUHAN INSTITUTE OF TECHNOLOGY
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  • Claims
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Problems solved by technology

[0004] Bagasse is derived from the by-products of sugarcane sugar production. It is a biomass raw material with a wide range of sources and low cost. For a long time, most of it has been directly incinerated, causing environmental pollution and waste of resources.
Bagasse is mainly composed of cellulose, hemicellulose and lignin, and the composition of different substances makes it difficult to be utilized

Method used

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  • A kind of bagasse-based anionic adsorbent and its preparation method and application
  • A kind of bagasse-based anionic adsorbent and its preparation method and application
  • A kind of bagasse-based anionic adsorbent and its preparation method and application

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Experimental program
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Effect test

Embodiment 1

[0034] The preparation of bagasse-based anionic adsorbent, concrete steps are as follows:

[0035] 1) Washing and drying treatment: use discarded bagasse as raw material, first soak it in clean water, wash to remove dirt and dust, then wash it with distilled water, and then dry it to constant weight to make bagasse raw material for future use.

[0036] 2) Esterification reaction: Take 50g bagasse raw material, mix it with 450mL nitric acid (63% by mass) and 150mL glacial acetic acid, stir at 30°C under normal pressure, and perform esterification reaction for 4 hours to obtain bagasse ester.

[0037] 3) Coordination reaction: the bagasse ester obtained in step 2) was mixed with 300mL ferric chloride (6%) solution, stirred at 35°C under normal pressure for 4 hours, and the reaction product was washed with distilled water several times to medium properties, suction filtration, and drying at 35°C to obtain Fe-coordinated modified bagasse-based anion adsorbent (finished adsorbent)....

Embodiment 2

[0047] The preparation of bagasse-based anionic adsorbent, concrete steps are the same as embodiment 1, just change the massfraction of nitric acid used in step 2) esterification reaction to 65%, change step 3) the massfraction of ferric chloride used in coordination reaction The mass fraction was changed to 8%, and the temperature of the coordination reaction was changed to 55°C.

[0048] In the present embodiment, the infrared spectrum comparison chart of the bagasse raw material obtained in step 1), the bagasse nitrate ester obtained in step 2) and the modified bagasse-based anion adsorbent obtained in step 3) are as follows figure 2 shown. Contrast (a), (b) 1700cm -1 Left and right, proving that there are NO groups in nitrate esterification, 1300cm -1 The left and right prove that there is C-N, so the esterification is successful; in the comparison (b), (c) it is found that 1300cm -1 The stretching vibration has been weakened, indicating that the coordination of Fe sho...

Embodiment 3

[0051] The preparation of bagasse-based anionic adsorbent, the specific steps are the same as in Example 1, except that the mass fraction of nitric acid used in step 2) in the esterification reaction is changed to 53%, the volume consumption is changed to 400mL, and the step 3) in the coordination reaction The mass fraction of the ferric chloride used is changed to 4%, and the dosage volume is changed to 250mL.

[0052] According to the adsorption performance test method described in Example 1, when 0.5 g of the bagasse-based anion prepared in this embodiment is adsorbed at 25° C. to absorb 80 mL of 5 mg / L phosphate solution, the phosphate solution reaches the peak value within 45 minutes. Adsorption equilibrium, when the adsorption equilibrium is reached, the concentration of the adsorbed phosphate solution is 2.15 mg / L, and the adsorption efficiency is the highest at this time, reaching 57%.

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Abstract

The invention provides a bagasse based anion adsorbent and a preparation method and application thereof. The preparation method of the bagasse based anion adsorbent comprises the following steps: (1) esterification reaction: mixing bagasse raw material with nitric acid and glacial acetic acid, stirring and reacting for a period of time at certain temperature to obtain bagasse nitrate; (2) coordination reaction: mixing the bagasse nitrate obtained in step (1) with ferric chloride liquor, stirring and reacting for a period of time at certain temperature, washing a reaction product to be neutral, performing suction filtration and drying, thus obtaining the bagasse based anion adsorbent. The preparation method is wide in raw material source, low in price, simple in preparation process, low in requirement for equipment, and high in production efficiency. The bagasse based anion adsorbent prepared by adopting the method can be used for adsorbing anions in eutrophic water.

Description

technical field [0001] The invention relates to a bagasse-based anion adsorbent, a preparation method and application design thereof, and belongs to the field of biomass materials and adsorption separation. Background technique [0002] Eutrophication of water body refers to the pollution phenomenon caused by the excessive content of nutrients such as N and P in the water body. Industrial production and excessive fertilization in agriculture have resulted in serious eutrophication of lakes around cities. In order to solve this problem, biological methods, ecological methods and adsorption methods are commonly used at present, and among them, biological methods and ecological methods are often expensive and consume a lot of energy. Therefore, the preparation of eutrophication anion adsorbents is a development plan that conforms to the needs of the times and benefits the future, especially the ability to prepare a low-cost adsorbent that can treat waste with waste is even mor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/24B01J20/30C02F1/28
CPCB01J20/24B01J2220/4825C02F1/286
Inventor 罗晓刚刘超袁俊朱星蓉雷小娟
Owner WUHAN INSTITUTE OF TECHNOLOGY
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