Preparation method of polypyrrole-modified corncob composite adsorbent

A composite adsorption and corncob technology, applied in chemical instruments and methods, adsorption water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of lack of regeneration ability and limited adsorption capacity of adsorbents, and achieve beneficial The effect of resource recovery

Active Publication Date: 2015-03-04
HARBIN INST OF TECH
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for preparing polypyrrole-modified corncob composite adsorbents for the problems of limited adsorption capacity and lack of regeneration capacity of traditional adsorbents

Method used

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  • Preparation method of polypyrrole-modified corncob composite adsorbent
  • Preparation method of polypyrrole-modified corncob composite adsorbent
  • Preparation method of polypyrrole-modified corncob composite adsorbent

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specific Embodiment approach 1

[0016] Specific embodiment one: the preparation method of the corn cob composite adsorbent modified by polypyrrole in this embodiment is implemented according to the following steps:

[0017] 1. Take out the corn cob by mechanical method, crush it into block corn cob, then clean the block corn cob with absolute ethanol and deionized water in turn, and then dry it with blast drying oven to obtain dry corn cob;

[0018] 2. Dissolving the pyrrole monomer in deionized water and stirring evenly with a magnetic force to obtain a pyrrole monomer solution;

[0019] 3. Place the dry corn cob obtained in step 1 in the pyrrole monomer solution in step 2, and stir evenly with magnetic force to obtain a mixed reaction solution;

[0020] Four, the FeCl 3 ·6H 2 O was dissolved in deionized water and stirred for 5-10 min to obtain FeCl 3 solution, followed by FeCl 3 ·6H 2 The molar ratio of O to pyrrole monomer is 1:1 to FeCl 3 The solution is added dropwise to the mixed reaction soluti...

specific Embodiment approach 2

[0025] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the size of the lump corncobs in step 1 is 0.5-2 cm. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0026] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the time for magnetic stirring in Step 2 is 5-10 minutes. Other steps and parameters are the same as those in Embodiment 1 or Embodiment 2.

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Abstract

The invention discloses a preparation method of a polypyrrole-modified corncob composite adsorbent, relates to absorbents applied to water treatment, and solves the problems of limited adsorption capacity and lack of regeneration capacity in a conventional adsorbent. The preparation method comprises the following steps: 1, washing blocky corncobs and drying to obtain dried corncobs; 2, dissolving pyrrole monomers in de-ionized water to obtain a pyrrole monomer solution; 3, putting the dried corncobs into the pyrrole monomer solution to obtain a mixed reaction liquid; 4, dissolving FeCl3.6H2O in the de-ionized water to obtain an FeCl3 solution and dropwise adding into the mixed reaction liquid to obtain reaction liquid containing modified blocky corncobs; 5, separating out the modified blocky corncobs from the reaction liquid, washing and drying to obtain the corncob composite adsorbent. According to the preparation method, the crop wastes-corncobs are used as raw materials, the cost is low, the mechanical strength of the materials is high, and the prepared modified corncob composite absorbent has a good treatment effect on Cr (VI) in the water and is convenient to recover.

Description

technical field [0001] The invention relates to an adsorbent used in water treatment, in particular to a preparation method of a polypyrrole (PPy) modified corncob composite adsorbent. Background technique [0002] With the rapid development of industries such as leather and electroplating in recent years, the problem of heavy metal pollution in water is becoming more and more serious, which seriously threatens human health. At present, adsorption technology is widely used in heavy metal purification methods, but the corresponding adsorbent materials generally have "bottlenecks" such as large preparation investment, high cost, difficult recycling and reuse, and easy to cause secondary pollution. Therefore, the development of low-cost, environmentally friendly, and recyclable new adsorbent materials is of great significance for the removal of heavy metals in water. [0003] Biomass material Corn cob is a kind of crop waste, its main components are cellulose, hemicellulose an...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/30C02F1/28C02F1/62
CPCB01J20/26B01J20/3085B01J2220/485C02F1/286C02F1/62
Inventor 王威陈焕何皎洁崔福义姜秀孙凤莲
Owner HARBIN INST OF TECH
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