Method for preparing heavy metal ion adsorbent through phyllostachys edulis pulp cellulose modification

A technology of heavy metal ions and adsorbents, applied in chemical instruments and methods, adsorption water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of high price, insufficient supply of fiber raw materials, complex reactions, etc., and achieve reduction Experimental procedure, improvement of biodegradability, effect of saving experimental cost

Inactive Publication Date: 2018-02-16
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In order to overcome the problems of insufficient supply of fiber raw materials for the preparation of adsorbent materials, high prices, and complicated reactions, and at the same time reduce the pollution and damage of heavy metal ions to the environment, and prepare new biodegradable metal ion adsorption materials with high added value, the purpose of the present invention It is to provide a method for preparing heavy metal ion adsorbent by modifying moso bamboo pulp cellulose

Method used

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  • Method for preparing heavy metal ion adsorbent through phyllostachys edulis pulp cellulose modification
  • Method for preparing heavy metal ion adsorbent through phyllostachys edulis pulp cellulose modification

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Embodiment 1

[0020] 1) Cut the moso bamboo pulp board into pieces, dry it, crush it with a plant crusher, and filter through a 100-mesh screen to obtain moso bamboo pulp cellulose powder with a particle size of 0.15mm or less;

[0021] 2) The moso bamboo pulp cellulose powder obtained in step 1) is added to the pre-frozen 1.5h sodium hydroxide and thiourea at a solid-to-liquid ratio of 1:75 to the mass fraction of 10.5wt% and 8.5wt, respectively. % In the mixed solution, placed in an environment of -12°C to fully dissolve, and obtain the moso bamboo pulp cellulose solution;

[0022] 3) Add 0.8 g of sodium periodate to the moso bamboo pulp cellulose solution obtained in step 2), and mechanically stir the reaction at 50°C for 4 hours. After the reaction, add 1 mL of ethylene glycol solution to terminate the oxidation reaction to obtain the oxidized Cellulose solution

[0023] 4) Place the oxidized cellulose solution obtained in step 3) at room temperature and react with thiourea in the system for ...

Embodiment 2

[0026] 1) Cut the moso bamboo pulp board into pieces, dry it, crush it with a plant crusher, and filter through a 100-mesh screen to obtain moso bamboo pulp cellulose powder with a particle size of less than or equal to 0.15mm;

[0027] 2) The moso bamboo pulp cellulose powder obtained in step 1) is added to the pre-frozen 1h sodium hydroxide and thiourea at a solid-to-liquid ratio of 1:100 to a mixture of 11wt% and 8wt%, respectively In the solution, place it in an environment of -10°C to fully dissolve it to obtain a moso bamboo pulp cellulose solution;

[0028] 3) Add 1.0 g of sodium periodate to the moso bamboo pulp cellulose solution obtained in step 2), and mechanically stir the reaction at 60°C for 6 hours. After the reaction, add 2 mL of ethylene glycol solution to stop the oxidation reaction, and obtain the oxidized Cellulose solution

[0029] 4) Place the oxidized cellulose solution obtained in step 3) at room temperature, and react with thiourea in the system for 1 hour t...

Embodiment 3

[0032] 1) Cut the moso bamboo pulp board into pieces, dry it, crush it with a plant crusher, and filter through a 100-mesh screen to obtain moso bamboo pulp cellulose powder with a particle size of less than or equal to 0.15mm;

[0033] 2) The moso bamboo pulp cellulose powder obtained in step 1) is added to the pre-frozen 2h sodium hydroxide and thiourea at a solid-to-liquid ratio of 1:50 to the mixture of 10wt% and 9wt%, respectively. In the solution, place it in an environment of -14°C to fully dissolve it to obtain a cellulose solution of bamboo pulp;

[0034] 3) Add 0.6g of sodium periodate to the moso bamboo pulp cellulose solution obtained in step 2), and mechanically stir the reaction at 40°C for 2h. After the reaction, add 3mL ethylene glycol solution to terminate the oxidation reaction, and obtain the oxidized Cellulose solution

[0035] 4) Put the oxidized cellulose solution obtained in step 3) at room temperature, and react with thiourea in the system for 3 hours to obta...

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Abstract

The invention discloses a method for preparing a heavy metal ion adsorbent through phyllostachys edulis pulp cellulose modification. Key points of the method include dissolving phyllostachys edulis pulp cellulose in a mixed solution of sodium hydroxide and thiourea, performing low-temperature freezing treatment to obtain a uniformly-dissolved phyllostachys edulis pulp cellulose solution, performing oxidation treatment, and reacting the obtained product with thiourea in the system to obtain an adsorbent. A consequent reaction raw material is introduced to a cellulose solution system, the reaction steps are reduced, and the preparation cost is reduced. An innovative idea of high-value application of phyllostachys edulis resource is provided, and economic income of farmers in a phyllostachysedulis area is actually improved, so that the method has practical significance.

Description

Technical field [0001] The invention relates to a method for preparing a heavy metal ion adsorbent, in particular to a method for preparing a heavy metal ion adsorbent by modifying cellulose of moso bamboo pulp, which belongs to the field of organic polymer materials. Background technique [0002] With the development of industrialization in recent decades, the discharge of wastewater has been increasing, which has caused serious damage to the environment. Various harmful substances in wastewater are enriched in the biological chain through the water body, and finally enter the human body, bringing serious toxic effects to humans. The heavy metal ions contained in it are one of the most serious environmental pollution and the most harmful to human health. Therefore, how to treat heavy metal wastewater has received widespread attention from all walks of life. [0003] At present, effective separation processes for removing heavy metal ions in sewage include precipitation, ion exch...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/30B01J20/24C02F1/28C02F101/20
CPCB01J20/24C02F1/286C02F2101/20
Inventor 张勇谈学松范志磊姚菊明
Owner ZHEJIANG SCI-TECH UNIV
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