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Modified bean dreg adsorbent, preparation method and application thereof

A soybean dregs and adsorbent technology, applied in the field of modified soybean dregs adsorbent and its preparation, can solve the problems of deepening color of wastewater, small specific surface area, reduced specific surface area, etc. Effect

Inactive Publication Date: 2016-08-17
谢松芬
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] When agricultural and forestry wastes are generally used directly as metal ion adsorbents, they have the disadvantages of small specific surface area and poor adsorption capacity, and the dissolution of low molecular weight phenol will cause the color of treated wastewater to deepen, weakening the adsorption of metal ions ability
Therefore, it is generally necessary to chemically modify agricultural and forestry wastes. Chemical modification often adopts graft copolymerization modification. After graft copolymerization modification, the carboxyl content is more, the total negative charge is greatly increased, and the adsorption capacity for heavy metals is greatly enhanced. However, the specific surface area is greatly reduced

Method used

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  • Modified bean dreg adsorbent, preparation method and application thereof
  • Modified bean dreg adsorbent, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 1) Grinding soybean dregs to 60 mesh, drying to obtain soybean dregs powder;

[0023] 2) Add 1g of soybean dregs powder and 100ml of 2mol / L silicic acid into the three-necked flask, blow in nitrogen until the oxygen in the system is eliminated, stir for 0.5h, then lower the temperature below 30°C, and add cerium ammonium nitrate to a concentration of 5mmol / L (that is, the content of cerium ammonium nitrate in every L solution of the three-necked bottle is 5mmol) and methyl acrylate to a concentration of 0.5mol / L (that is, the content of methyl acrylate in every L solution of the three-necked bottle is 0.5mol) to carry out graft copolymerization React for 1h, add 2ml of 5% hydroquinone to stop the reaction, filter, wash the filter cake with distilled water, dry at 60°C, wash off the homopolymer with acetone in a Soxhlet extractor, and dry it to obtain the graft copolymer;

[0024] 3) Add 1000ml of 0.5mol / L sodium hydroxide solution to the dried graft copolymer, carry o...

Embodiment 2

[0026] 1) Grinding the soybean dregs to 100 mesh, drying to obtain soybean dregs powder;

[0027] 2) Add 1g of soybean dregs powder and 150ml of 3mol / L silicic acid into the three-necked flask, pass nitrogen gas until the oxygen in the system is eliminated, stir for 1h, then lower the temperature below 30°C, add cerium ammonium nitrate to a concentration of 6mmol / L L (that is, the content of cerium ammonium nitrate in every L solution of the there-necked bottle is 6mmol) and methyl acrylate to a concentration of 0.8mol / L (that is, the content of methyl acrylate in every L solution of the there-necked bottle is 0.8mol) to carry out graft copolymerization reaction 2h, add 2ml of 5% hydroquinone to stop the reaction, filter, wash the filter cake with distilled water, dry at 60°C, wash off the homopolymer with acetone in a Soxhlet extractor, and dry, which is graft copolymerization thing;

[0028] 3) Add 1500ml of 1mol / L sodium hydroxide solution to the dried graft copolymer and ...

Embodiment 3

[0030] 1) Grinding soybean dregs to 80 meshes, drying to obtain soybean dregs powder;

[0031] 2) Add 1g of soybean dregs powder and 120ml of 2.5mol / L silicic acid into the three-necked flask, pass nitrogen gas until the oxygen in the system is eliminated, stir for 0.8h, then lower the temperature below 30°C, and add cerium ammonium nitrate to a concentration of 5.5mmol / L (that is, the content of cerium ammonium nitrate in every L solution of the there-necked bottle is 5.5mmol) and methyl acrylate until the concentration is 0.6mol / L (that is, the content of methyl acrylate in every L solution of the there-necked bottle is 0.6mol) Graft copolymerization reaction 1.5h, add 2ml 5% hydroquinone to stop the reaction, filter, wash the filter cake with distilled water, after drying at 60°C, wash away the homopolymer with acetone in a Soxhlet extractor, dry, That is graft copolymer;

[0032] 3) Add 100ml of 0.8mol / L sodium hydroxide solution to the dried graft copolymer and carry out...

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Abstract

The invention provides a preparation method for a modified bean dreg adsorbent. The preparation method comprises the following steps: (1) drying and smashing bean dregs, thereby acquiring the bean dreg powder; (2) mixing the bean dreg powder with silicic acid solution, and meanwhile, introducing nitrogen, and then adding ceric ammonium nitrate and methyl acrylate, performing graft copolymerization, adding hydroquinone to end the reaction, filtering, washing a filter cake with acetone, drying and acquiring the graft copolymer; (3) adding sodium hydroxide solution into the dry graft copolymer, performing saponification treatment for 10-15h under the conditions of 60-70 DEG C, ultrasonic 50,000-100,000 Hz and 200-500 MPa, cooling, adjusting pH to 6-7, filtering, washing the filter case with acetone, drying to acquire the modified bean dreg adsorbent. The invention also provides the modified bean dreg adsorbent and an application thereof for a heavy metal ion absorbent. The absorbent provided by the invention is high in total negative charge, large in specific surface area and excellent in adsorption capacity for heavy metal.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a modified soybean dregs adsorbent and its preparation method and application. Background technique [0002] Heavy metals widely exist in the atmosphere, water, and soil environment, mainly mercury, chromium, cadmium, lead, copper, etc. After entering the environment, heavy metals cannot be biodegraded, circulate through the food chain, and eventually accumulate in the organism, destroying the normal state of the organism. Physiological metabolic activities, thereby endangering human health. Agricultural and forestry waste is a by-product of agricultural and forestry production and processing. It has many advantages such as low price, large output, renewable, short regeneration cycle, biodegradable, and environmentally friendly. Agricultural and forestry wastes have high porosity and large specific surface area, which can physically adsorb metal ions. Some a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/30B01J20/22C02F1/28C02F101/20
CPCB01J20/22B01J20/264B01J2220/4806B01J2220/4812C02F1/285C02F2101/20
Inventor 谢松芬
Owner 谢松芬
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