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A kind of desorption method of soybean shell heavy metal ion adsorbent

A technology of heavy metal ions and soybean hulls, applied in separation methods, chemical instruments and methods, adsorption water/sewage treatment, etc., can solve the problems of low desorption efficiency and poor mechanical properties of adsorbents, and achieve good adsorption performance and improve desorption rate. , the effect of simple operation

Active Publication Date: 2020-12-22
XUZHOU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods generally have problems such as poor mechanical properties of the adsorbent after desorption and low desorption efficiency.

Method used

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  • A kind of desorption method of soybean shell heavy metal ion adsorbent

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Experimental program
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Effect test

Embodiment 1

[0044] A soybean shell heavy metal ion adsorbent is prepared by the following method:

[0045] (1) Clean soybean shells, dry them, crush them, pass through a 200-mesh sieve, and carry out carbonization under an argon atmosphere after sieving. The heating rate is 5°C / min, the carbonization temperature is 600°C, and the carbonization time is 40 minutes. 200 sieves, obtain soybean hull carbonized powder (SC);

[0046](2) Ultrasonic disperse 10g of soybean hull carbonized powder into 40mL, 80mg / mL tannic acid (TA) aqueous solution, add 6mL triethylenetetramine (TETA) under stirring, mix the three evenly, and react at 25°C for 6h , after the reaction, suction filtration, the product was washed 3 times with distilled water, and then vacuum-dried at 70° C. for 8 hours to obtain SC-P(TA-TETA);

[0047] (3) Ultrasonic disperse 10g of SC-P (TA-TETA) and 2g of ethylenediaminetetraacetic dianhydride (EDTAD) into 15mL of DMF, heat and stir at 60°C for 18h, after the reaction, filter with ...

Embodiment 2

[0049] A kind of desorption method of soybean shell heavy metal ion adsorbent, the method comprises the following steps:

[0050] (1) Washing the saturated soybean hull heavy metal ion adsorbent with ethanol to remove organic matter remaining in the adsorbent; wherein, the soybean hull heavy metal ion adsorbent is prepared in Example 1;

[0051] (2) Under ultrasonic treatment, adopt the hydrochloric acid solution that mass fraction is 10% to impregnate the adsorbent after washing, the ratio of adsorbent and hydrochloric acid solution is 1g:60mL; Wherein, the condition of described ultrasonic treatment is: frequency is 50KHz, power 100W, 3 times, 2min interval, 30s each time;

[0052] (3) Continue to immerse in hydrochloric acid solution after the ultrasonic treatment is completed. This hydrochloric acid solution can continue to use the one in step (2) and does not need to be replaced. The immersion time is 4h and the immersion temperature is 25°C; after immersion, suction filt...

Embodiment 3

[0056] A kind of desorption method of soybean shell heavy metal ion adsorbent, the method comprises the following steps:

[0057] (1) Washing the saturated soybean hull heavy metal ion adsorbent with ethanol to remove organic matter remaining in the adsorbent; wherein, the soybean hull heavy metal ion adsorbent is prepared in Example 1;

[0058] (2) Under ultrasonic treatment, adopt the hydrochloric acid solution that mass fraction is 12% to impregnate the adsorbent after washing, the ratio of adsorbent and hydrochloric acid solution is 1g: 60mL; Wherein, the condition of described ultrasonic treatment is: frequency is 60KHz, 150W power, 4 treatments, 2min interval, 40s each time;

[0059] (3) Continue to immerse in hydrochloric acid solution after the ultrasonic treatment is completed. This hydrochloric acid solution can continue to use the one in step (2) and does not need to be replaced. The immersion time is 6h and the immersion temperature is 25°C; after immersion, suctio...

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Abstract

The invention relates to a desorption method of a soybean hull heavy metal ion adsorbent. The desorption method comprises the following steps: (1) washing the soybean hull heavy metal ion adsorbent which is saturated by adsorption with ethanol; (2) under ultrasonic treatment, impregnating the washed adsorbent with an acid solution; (3) after the ultrasonic treatment is finished, continuing to carry out acid solution impregnation, and filtering, washing and drying the adsorbent after impregnation; (4) soaking the dried adsorbent in an acid solution, and meanwhile, carrying out microwave irradiation treatment; and (5) filtering, washing, drying and grinding the adsorbent after the microwave irradiation is finished, so as to complete desorption of the soybean hull heavy metal ions. The desorption method provided by the invention is simple to operate, and the structural form and adsorption performance of the desorbed adsorbent are basically kept unchanged.

Description

technical field [0001] The invention relates to a desorption method of a soybean hull heavy metal ion adsorbent. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] Heavy metal pollution is an extremely serious environmental problem. Waste water, waste residue, waste gas, and sludge pass through water, soil, air, and especially the food chain, causing serious harm to human survival and physical and mental health. In recent years, adsorption separation technology has been greatly developed, and it has been applied in the treatment of heavy metal wastewater, mainly for environmental protection and to overcome the deteriorating environmental quality. Due to the existence of var...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/22B01J20/34C02F1/28C02F101/20C02F101/22
CPCB01J20/20B01J20/22B01J20/3425B01J20/3441B01J20/3475B01J2220/485C02F1/283C02F1/285C02F2101/20C02F2101/22
Inventor 刘辉冯小刚张建萍苗敬芝张文莉
Owner XUZHOU UNIV OF TECH