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A kind of preparation method of activated carbon-persimmon tannin composite adsorbent

A composite adsorption and activated carbon technology, applied in chemical instruments and methods, adsorption water/sewage treatment, water/sludge/sewage treatment, etc., can solve difficult metal ion removal problems, achieve low cost, improve purity quality, The effect of simple process

Inactive Publication Date: 2011-12-07
HUBEI SHIWEITIAN PHARMA TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because persimmon tannins are easily soluble in water, it is difficult to be directly used for the removal of metal ions in water

Method used

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  • A kind of preparation method of activated carbon-persimmon tannin composite adsorbent
  • A kind of preparation method of activated carbon-persimmon tannin composite adsorbent

Examples

Experimental program
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Effect test

Embodiment 1

[0026] A preparation method of activated carbon-persimmon tannin composite adsorbent, which comprises the following steps:

[0027] 1) Pretreatment of activated carbon: ①Add 100g of activated carbon to 500ml of distilled water at 95-100°C and stir for 1h, then stir for 1h (this stirring is to continue stirring for 1h after the heating is stopped, in order to achieve the purpose of sufficient water washing, and the temperature and There are no strict requirements;); the solid is obtained by suction filtration; ② Pickling: add 250 ml of hydrochloric acid solution with a concentration of 5 to 6 mg / L to the obtained solid, heat to 90 to 100 ° C and stir for 1 hour, then stand for 24 hours. Wash with distilled water for 3 to 5 times until the pH of the final rinse is 5.0 to 6.0;

[0028] ③ The pickling process in the above step ② is repeated 3 times;

[0029] 4. The solid obtained after pickling is dried to constant weight in a 105 ℃ oven to obtain the treated activated carbon for...

Embodiment 2

[0034] A preparation method of activated carbon-persimmon tannin composite adsorbent, which comprises the following steps:

[0035] 1) pretreatment of activated carbon: the pickling process of step 2 is repeated 4 times, and the rest are the same as step 1 of embodiment 1);

[0036] 2) Magnetic stirring for 12h, and the rest are the same as step 2) of Example 1.

Embodiment 3

[0038] A preparation method of activated carbon-persimmon tannin composite adsorbent, which comprises the following steps:

[0039] 1) Pretreatment of activated carbon: ① Add 100 g of activated carbon to 500 ml of distilled water, boil and stir for 1 hour, and then stir for 1 hour; suction filtration to obtain solid; ② Pickling: add 250 ml of hydrochloric acid with a concentration of 5 to 6 mg / L to the obtained solid The solution was heated to 90-100 °C and stirred for 1 h, then stood for 24 h, and was washed with distilled water 3-5 times by suction filtration until the pH of the final rinse solution was 5.0-6.0;

[0040] ③ The pickling process of the above step ② is repeated 5 times;

[0041] 4. The solid obtained after pickling is dried to constant weight in a 95°C oven to obtain the treated activated carbon for subsequent use;

[0042] 2) Magnetic stirring for 24h, drying in an oven at 85°C, and the rest are the same as in step 2) of Example 1.

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Abstract

The invention relates to a method for preparing an activated carbon-persimmon tannin compound absorbent. The method comprises the following steps: 1) pre-treating the activated carbon; 2) on the basis that a ratio of the treated activated carbon to a persimmon tannin solution is 0.500g:250ml, preparing the treated activated carbon and the persimmon tannin solution with concentration of 40mg / L; adding the treated activated carbon into the persimmon tannin solution of which the pH value is 3.0; magnetically stirring for 8-24 hours; filtering with oily filter paper; washing with distilled water; and drying in an oven at 85-105 DEG C to finally obtain the activated carbon-persimmon tannin compound absorbent. The method has the advantages that the cost is low, the process is simple and the prepared compound absorbent has better absorbing effect. The compound absorbent can be used for purifying the industrial sewage and domestic water, can be used as a clarifying agent for liquor and an absorbent for cigarette filter tip, and is more beneficial to the health of human.

Description

technical field [0001] The invention relates to a preparation method of an activated carbon-persimmon tannin composite adsorbent. The composite adsorbent is suitable for the treatment of industrial wastewater containing heavy metal ions and the purification and treatment of residential water. Background technique [0002] Among many environmental pollutions, heavy metals cannot be naturally degraded by themselves, and then easily enter the human body through the food chain, which seriously endangers human health. Therefore, the pollution in water bodies has attracted more and more attention. Lead, cadmium, etc. and their compounds are widely used in mining, smelting, electronics, electroplating, petroleum, fertilizer manufacturing and other industries, and have become an important source of pollution in sewage and have attracted people's attention. All have strict regulations limiting their allowable amounts. [0003] At present, domestic methods for removing lead and cadm...

Claims

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Application Information

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IPC IPC(8): B01J20/22B01J20/30C02F1/28C02F1/62
Inventor 王勇李世安
Owner HUBEI SHIWEITIAN PHARMA TECH
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