Modified peanut shell cationic adsorbent, preparation method and application

A cationic, peanut shell technology, applied in the field of environment and chemistry, can solve problems such as unreported, and achieve the effects of low cost, good regeneration efficiency, and large adsorption capacity

Inactive Publication Date: 2012-07-11
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no report on the technology of removing Cr(VI) ions by modified peanut shell cationic adsorbent

Method used

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  • Modified peanut shell cationic adsorbent, preparation method and application
  • Modified peanut shell cationic adsorbent, preparation method and application
  • Modified peanut shell cationic adsorbent, preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Peanut shells are crushed to a powder of less than 1mm by a grinder, weigh 4g of crushed peanut shells into a three-neck round bottom flask, add 10mL epichlorohydrin and 10mL DMF, and place in a constant temperature water bath at 85°C to stir and react 1 hour.

[0031] (2) 4 mL of triethylenetetramine was added dropwise to the reactant in step (1), and stirred and reacted in a constant temperature water bath at 85° C. for 1 hour.

[0032] (3) The sample obtained by the reaction was taken out from the three-neck round bottom flask, washed 3 times with distilled water, and then filtered and dried with a vacuum pump. The dried sample was placed in an oven at 105°C for 5 hours, taken out and ground to a size below 1mm to obtain a modified peanut shell cationic adsorbent.

Embodiment 2

[0034] The operation steps are the same as in Example 1, except that the steps (1) and (2) are respectively stirred and reacted in a constant temperature water bath at 80°C for 70 minutes.

Embodiment 3

[0036] (1) Peanut shells are crushed to a powder of less than 1mm by a grinder, weigh 4g of crushed peanut shells into a three-necked round bottom flask, add 15mL epichlorohydrin and 15mL DMF, and place in a constant temperature water bath at 80°C to stir and react 1 hour.

[0037] (2) 6 mL of triethylenetetramine was added dropwise to the reactant in step (1), and stirred and reacted in a constant temperature water bath at 85° C. for 1 hour.

[0038] Step (3) is the same as in Example 1.

[0039] The following is an application example of using the modified peanut shell cationic adsorbent of Examples 1-3 for the adsorption of Cr(VI) ions in wastewater. The adsorption test conditions are as follows:

[0040] The dosage of modified peanut shell cationic adsorbent is 1g / L, the pH value of the solution is under the condition of natural preparation, the Cr(VI) ion concentration in the wastewater is 100mg / L, and the modified peanut shell cationic adsorbent is added to the wastewa...

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Abstract

The invention discloses a modified peanut shell cationic adsorbent, a preparation method and application. The adsorbent is prepared by using a peanut shell, epichlorohydrin, N, N-dimethyl formamide and triethylenetetramine as raw materials. The modified peanut shell cationic adsorbent is in a brown yellow powder shape, and the Zeta potential is between 31mv and 52mv. The process is simple, the cost of the raw materials is low, the adsorption capacity is high, the adsorbent can be regenerated, and the saturated adsorbent can also be directly incinerated. The modified peanut shell cationic adsorbent provided by the invention is used for adsorption removal of anions in wastewater, and particularly has high adsorption capacity of Cr (VI) ions.

Description

technical field [0001] The invention relates to a modified peanut shell cationic adsorbent, a preparation method and application, and belongs to the technical fields of environment and chemistry. Background technique [0002] Peanut shells are common crop wastes, and the annual production of peanut shells in my country is about 4.5×10 4 t, accounting for about 1 / 3 of the world's total output. The application of peanut shells is mainly as feed, papermaking raw materials and direct combustion, etc., but most of the peanut shells have not been effectively utilized. Other crop wastes like peanut shells have been reported to be used in the study of adsorbents, such as wheat straw, rice husk, sawdust, corn straw, coconut shell, bagasse, etc. CN1876227A (CN200510040485.8) discloses a method for preparing a cationic adsorbent by using straw, adding the crushed straw into a non-aqueous solvent dissolved in citric acid, refluxing for not less than 12 hours, filtering, and washing wi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/30C02F1/28C02F1/62
Inventor 岳敏张猛许醒岳钦艳高宝玉李小明
Owner SHANDONG UNIV
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