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Preparation method and application of cassava stalk-based anion adsorbent

A technology of cassava straw and adsorbent, which is applied in the field of preparation of cassava straw-based anionic adsorbent, can solve the problems of pollution, waste of resources and the environment, and achieve the effects of simple production process, low cost and good treatment effect

Inactive Publication Date: 2012-04-25
GUANGXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The rest are basically burned as fuels with low calorific value, or burned in the field, causing serious waste of resources and environmental pollution, which is a pity

Method used

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  • Preparation method and application of cassava stalk-based anion adsorbent
  • Preparation method and application of cassava stalk-based anion adsorbent
  • Preparation method and application of cassava stalk-based anion adsorbent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Embodiment 1: use cassava stalks as the method for raw material preparation anionic adsorbent

[0037] Wash cassava stalks, dry them, crush them, take 30g of powder with a particle size of 80 mesh, soak and stir in 1mol / L NaOH 300ml for 12h, filter, wash until neutral, and dry; weigh 2g of the dried product and put it into 50ml of epoxy chlorine Propane and 50ml N,N-dimethylformamide, stirred at 100°C for 1h; then added 10ml of pyridine, stirred at 100°C for 1h; added 35ml of dimethylamine solution, stirred at 100°C for 3h; HCl, 50% ethanol, and distilled water were washed to neutrality, and dried to obtain 4.2 g of anionic adsorbent.

Embodiment 2

[0038] Embodiment 2: use cassava stalks as the method for raw material preparation anion adsorbent

[0039] Wash cassava stalks, dry them, crush them, take 30g of powder with a particle size of 80 mesh, soak and stir in 1mol / L NaOH 300ml for 12h, filter, wash until neutral, and dry; weigh 2g of the dried product and put it into 50ml of epoxy chlorine Propane and 50ml N,N-dimethylformamide, stirred at 100°C for 1h; then added 20ml of pyridine, stirred at 100°C for 1h; added 30ml of dimethylamine solution, stirred at 100°C for 3h; HCl, 50% ethanol, and distilled water were washed to neutrality, and dried to obtain 3.8 g of anionic adsorbent.

Embodiment 3

[0040]Embodiment 3: the method for preparing anionic adsorbent with cassava stalks as raw material

[0041] Wash cassava stalks, dry them, crush them, take 30g of powder with a particle size of 80 mesh, soak and stir in 1mol / L NaOH 300ml for 12h, filter, wash until neutral, and dry; weigh 2g of the dried product and put it into 50ml of epoxy chlorine Propane and 50ml N,N-dimethylformamide, stirred at 50°C for 90min; then added 10ml of pyridine, stirred at 50°C for 90min; added 20ml of dimethylamine solution, stirred at 50°C for 240min; HCl, 50% ethanol, and distilled water were washed to neutrality, and dried to obtain 3.0 g of anionic adsorbent.

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Abstract

The invention discloses a preparation method and an application of a cassava stalk-based anion adsorbent. The preparation method comprises the following steps: crushing cassava stalks, then pretreating the crushed cassava stalks with alkali, letting cassava stalks and epichlorohydrin be subject to grafting reaction by using N,N-dimethyl formamide as a reaction medium and pyridine as a catalyst, and introducing amine groups. The application is characterized by: under the conditions of room temperature and oscillation, adjusting the pH value of waste water to no larger than 12, adding the anion adsorbent to let the solid-liquid ratio of the adsorbent to eutrophic wastewater or dye waste water be no less than 1 g / L, filtering, and separating the anion adsorbent, wherein, the oscillation time is no shorter than 30 min. The method has the advantages of wide resource of the raw materials, low cost, and simple technology, is economical practical and reproducible. The adsorbent has the advantages of high weight gain ratio, good stability, good absorption efficacy and the like, and can be widely used in the treatment of water eutrophication and anion dye waste water.

Description

technical field [0001] The invention relates to an adsorbent, in particular to a preparation method of a cassava straw-based anion adsorbent and an application of the adsorbent. Background technique [0002] In recent years, due to the rapid development of urbanization, a large amount of nitrogen and phosphorus-containing sewage and dye wastewater have been discharged, causing a large amount of nitrogen and phosphorus nutrients to accumulate in the water body, resulting in high organic matter content and deep color in the water body. As a result, the problem of eutrophication and dye wastewater pollution is becoming more and more serious, which deteriorates the quality of the water environment, affects the development of aquaculture, and endangers human health. Therefore, the treatment of water eutrophication and dye wastewater has also become a research hotspot. [0003] In the 1940s, foreign countries started research on modified fibers. After the 1990s, due to the abund...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24C02F1/28
Inventor 康彩艳李旺莫蔚明张敏骏蒙冕武陈孟林
Owner GUANGXI NORMAL UNIV