Method for producing adsorbent by using polyphosphoric sodium phosphate-coupled chitosan and bamboo charcoal

A technology of sodium polyphosphate and production method, which is applied in chemical instruments and methods, adsorbed water/sewage treatment, other chemical processes, etc., can solve the problems of no adsorbent production method, and can achieve good CODcr and reduce CODcr. Effect

Inactive Publication Date: 2011-01-12
浙江天韵生态环境工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] After retrieval and market research, no method of using sodium polyphosphate to couple chitosan and bamboo charcoal as adsorbent in domestic sewage treatment has been found, and there is no report on the production method of this kind of adsorbent and related products on the market.

Method used

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  • Method for producing adsorbent by using polyphosphoric sodium phosphate-coupled chitosan and bamboo charcoal
  • Method for producing adsorbent by using polyphosphoric sodium phosphate-coupled chitosan and bamboo charcoal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Embodiment 1 (comparison of raw materials and parts by weight thereof for embodiment 1 in Table 1):

[0017] Get 5 parts of chitosan and add in 1250 parts by weight of 5% acetic acid solution, fully stir to make chitosan dissolve completely. Then add 50 parts of bamboo charcoal, fully stir for 5-6 hours, and place for 6-8 hours. Take 62.5 parts of sodium polyphosphate and add 1187.5 parts of water to make 1250 parts of 5% solution, add the sodium polyphosphate solution dropwise into the acidic mixed solution of bamboo charcoal and chitosan, stir for 7-8 hours, slowly add 125 parts 95% ethanol, continue to stir for 2-3 hours, terminate the coupling reaction, then carry out solid-liquid separation of the reactant, take the solid, add the solid to 150 parts by weight of water for washing, stir for 1 hour, separate the solid and liquid again, and then The solid matter was added to another part of 125 parts of 95% ethanol for washing, stirred for 1 hour, filtered, and the f...

experiment example

[0023] Under the condition of normal temperature, compare the treatment capacity of this adsorbent, bamboo charcoal and activated sludge on domestic sewage. Add 4g each of the adsorbent, bamboo charcoal and activated sludge to treat 150mL of domestic sewage, add the domestic sewage into a 250mL Erlenmeyer flask, then place the Erlenmeyer flask in a shaker at a speed of 130r / min, vibrate continuously for 24 hours, and let it stand 2h, take the supernatant to measure turbidity, pH, COD cr , Ammonia nitrogen index, the specific experimental data are shown in Table 2.

[0024] Table 2 Comparison table of the treatment results of domestic sewage by this adsorbent, bamboo charcoal and activated sludge

[0025]

[0026] After continuous shaking for 24h, the turbidity is 21NTU, COD cr Under the conditions of 151.7mg / L and ammonia nitrogen concentration of 56.2mg / L, the COD of domestic sewage by this adsorbent cr The removal rate is 62%, which is better than that of bamboo charco...

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Abstract

The invention provides a method for producing adsorbent by using polyphosphoric sodium phosphate-coupled chitosan and bamboo charcoal, which comprises the following steps of preparation of chitosan acid solution, pretreatment of the bamboo charcoal, preparation of mixed solution of the bamboo charcoal and the chitosan acid, preparation of coupled reactant of chitosan and the bamboo charcoal and preparation of bamboo charcoal adsorbent coupled with chitosan. The invention relates to a method for producing absorbent for treating domestic sewages. The absorbent produced by the method has preferable effects to reduce CODcr, turbidness and ammonia nitrogen in the domestic sewages compared with the bamboo or the activated sludge in treating the domestic sewages.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a preparation method of a domestic sewage treatment agent. Background technique [0002] Chitosan and coupled chitosan have a good sewage purification ability due to their microscopic porous structure, but chitosan has the disadvantages of being easily lost and used in a large amount. Bamboo charcoal has developed pores, large specific surface area, strong adsorption capacity, and is relatively cheap, so it is more widely used in sewage treatment. But the adsorption of bamboo charcoal has a saturation. [0003] The invention utilizes the advantages of the two at the same time, and adopts a new method to organically combine the two to obtain a sewage treatment agent with better performance. Taking advantage of the high adsorption capacity of bamboo charcoal, adding a coupling agent to couple chitosan and bamboo charcoal into larger polymers, the acid and water solubilit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/30C02F1/28
Inventor 任红星
Owner 浙江天韵生态环境工程有限公司
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