Modified biological adsorbent and preparation method thereof

A biosorbent and modified technology, applied in chemical instruments and methods, adsorption water/sewage treatment, water pollutants, etc., can solve the problems of low pollutant adsorption capacity, difficult metal ions to remove dye residues, adsorption and decolorization, etc. , to achieve the effect of large adsorption capacity, fast adsorption speed and good regeneration performance

Active Publication Date: 2018-12-25
XUZHOU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the untreated biosorbent has a low adsorption capacity for pollutants, and it is difficult to be directly applied to the removal of metal ions in industrial wastewater and the adsorption and decolorization of dye residues.

Method used

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  • Modified biological adsorbent and preparation method thereof
  • Modified biological adsorbent and preparation method thereof
  • Modified biological adsorbent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] (1) Dry the Cordyceps militaris residue at a temperature of 80°C to a constant weight, crush it, and pass through a 40-mesh sieve.

[0038] (2) Add the Cordyceps militaris after drying and crushing in step (1) to the 25% sodium hydroxide aqueous solution by mass concentration, and the ratio of the added amount of Cordyceps militaris to the sodium hydroxide aqueous solution is 1g:10ml; Swelling pretreatment at 70℃ for 5h. After the swelling pretreatment, the Cordyceps militaris residue is taken out, washed with deionized water to neutrality, and dried to obtain the Cordyceps militaris residue after the swelling pretreatment.

[0039] (3) Add the Cordyceps militaris after the swelling pretreatment to N,N-dimethylformamide (DMF) dissolved in succinic anhydride, and add the swelling pretreated Cordyceps militaris and succinic anhydride. The mass ratio is 1:5; the ratio of the added amount of Cordyceps militaris after swelling pretreatment to N,N-dimethylformamide is 1g:25ml; re...

Embodiment 2

[0043] (1) Dry the Cordyceps militaris residue at a temperature of 80°C to a constant weight, crush it, and pass through a 40-mesh sieve.

[0044] (2) Add the Cordyceps militaris after drying and crushing in step (1) to the 20% aqueous sodium hydroxide solution by mass concentration, and the ratio of the added amount of Cordyceps militaris to the sodium hydroxide aqueous solution is 1g:12ml; The swelling pretreatment is 6h at 60℃. After the swelling pretreatment, the Cordyceps militaris residue is taken out, washed with deionized water to neutrality, and dried to obtain the Cordyceps militaris residue after the swelling pretreatment.

[0045] (3) Add the Cordyceps militaris after the swelling pretreatment to N,N-dimethylformamide (DMF) dissolved in ethylenediaminetetraacetic acid dianhydride, and swell the pretreated Cordyceps militaris with ethyl acetate. The mass ratio of diaminetetraacetic acid dianhydride added is 1:6; the ratio of the added amount of Cordyceps militaris after...

Embodiment 3

[0049] (1) Dry the Cordyceps militaris residue at a temperature of 80°C to a constant weight, crush it, and pass through a 40-mesh sieve.

[0050] (2) Add the Cordyceps militaris after being dried and crushed in step (1) to the 30% aqueous sodium hydroxide solution by mass concentration, and the ratio of the added amount of Cordyceps militaris to the sodium hydroxide aqueous solution is 1g:10ml; Swelling pretreatment at 80℃ for 4h. After the swelling pretreatment, the Cordyceps militaris residue is taken out, washed with deionized water to neutrality, and dried to obtain the Cordyceps militaris residue after the swelling pretreatment.

[0051] (3) Add the Cordyceps militaris after the swelling pretreatment to N,N-dimethylformamide (DMF) dissolved with pyromellitic dianhydride, and swell the pretreated Cordyceps militaris and isobenzene The mass ratio of tetracarboxylic dianhydride added is 1:4; the ratio of the added amount of Cordyceps militaris after swelling pretreatment to N,N...

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Abstract

The invention relates to a modified biological adsorbent and a preparation method thereof. The preparation method includes the steps of 1), subjecting dried and ground cordyceps militaris fungus chaffto swelling pretreatment for 4-6 hours in a sodium hydroxide aqueous solution to obtain cordyceps militaris fungus chaff after swelling treatment; 2), adding the cordyceps militaris fungus chaff after swelling treatment to anhydride compounds dissolved N,N-Dimethyl formamide for reaction at the temperature of 65-85DEG C for 2-4 hours to obtain an intermediate product I; 3), adding the intermediate product I into an ethylenediamine aqueous solution for stirring reaction at the temperature of 80-90DEG C for 1-3 hours to obtain an intermediate product Ii; 4), evenly mixing the intermediate product II with a sodium alginate solution, adding epichlorohydrin for reaction at the temperature of 50-60DEG C for 30-60 minutes, performing filtration to obtain a solid object, and drying the solid object to obtain the modified biological adsorbent. The prepared modified biological adsorbent has quite good adsorbent effect on metal ions and dye molecules and can be recycled.

Description

Technical field [0001] The invention relates to the technical field of adsorption material preparation, in particular to a modified biological adsorbent and a preparation method thereof. Background technique [0002] Water pollution caused by various heavy metals in industrial wastewater is attracting worldwide attention. Heavy metal ions are mainly released into the natural environment through industrial wastewater such as smelting, electrolysis and electroplating, urban domestic wastewater and various mining wastewater. Heavy metals cannot be biodegraded and thermally degraded in nature. They enter the human body through the food chain and are extremely harmful to human kidneys, lungs and other internal organs. Traditional heavy metal wastewater treatment technologies mainly include chemical precipitation, chemical oxidation and reduction, ion exchange, membrane technology, electrochemical treatment, reverse osmosis, and distillation. These traditional methods have secondary p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/28B01J20/30C02F1/28C02F101/20C02F101/30
CPCB01J20/24B01J20/28054B01J20/3085B01J2220/4825B01J2220/4887C02F1/286C02F2101/20C02F2101/308
Inventor 陈尚龙蔡望秋赵节昌李超师聪巫永华张建萍刘恩岐
Owner XUZHOU UNIV OF TECH
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