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Method of using Cortex granati as raw material to prepare heavy metal adsorbent

A pomegranate peel and heavy metal technology, applied in chemical instruments and methods, adsorption water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of deepening wastewater color, small specific surface area, and reduced specific surface area. The effect of high negative charge and high specific surface area

Inactive Publication Date: 2016-08-24
黄万忠
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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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  • Method of using Cortex granati as raw material to prepare heavy metal adsorbent
  • Method of using Cortex granati as raw material to prepare heavy metal adsorbent
  • Method of using Cortex granati as raw material to prepare heavy metal adsorbent

Examples

Experimental program
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Effect test

Embodiment 1

[0020] 1) Pulverizing the pomegranate peel to 60 mesh, drying to obtain pomegranate peel powder;

[0021] 2) Add 1g of pomegranate peel 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;

[0022] 3) Add 1000ml of 0.5mol / L sodium hydroxide solution to the dried graft co...

Embodiment 2

[0024] 1) Pulverizing the pomegranate peel to 100 mesh, drying to obtain pomegranate peel powder;

[0025] 2) Add 1g of pomegranate peel 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, and 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;

[0026] 3) Add 1500ml of 1mol / L sodium hydroxide solution to the dried graf...

Embodiment 3

[0028] 1) Pulverizing the pomegranate peel to 80 mesh, drying to obtain pomegranate peel powder;

[0029] 2) Add 1g of pomegranate peel 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;

[0030] 3) Add 100ml of 0.8mol / L sodium hydroxide solution to the dried graft copolymer...

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Abstract

The invention provides a method for preparing a heavy metal adsorbent by using pomegranate peel as raw material, comprising the following steps: 1) drying and pulverizing pomegranate peel to obtain pomegranate peel powder; 2) mixing pomegranate peel powder and silicic acid solution, and simultaneously Into nitrogen, then add cerium ammonium nitrate and methyl acrylate to carry out graft copolymerization reaction, add hydroquinone to stop the reaction, filter, filter cake is washed with acetone, dry, it is graft copolymer; 3) to dry graft Add sodium hydroxide solution to the branch copolymer, carry out saponification treatment at 60-70°C, ultrasonic wave 50,000-100,000 Hz, 200-500 MPa for 10-15 hours, cool, adjust the pH to 6-7, filter, and use the filter cake Acetone washing, drying, that is, heavy metal adsorbent. The adsorbent of the invention has only high total negative charge, large specific surface area, and good adsorption capacity for heavy metals.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a method for preparing a heavy metal adsorbent by using pomegranate peel as a raw material. 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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/30C02F1/28C08F251/02C08F220/14C02F101/20
CPCB01J20/264B01J2220/4881C02F1/285C02F2101/20C08F251/02
Inventor 黄万忠
Owner 黄万忠
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