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Method for preparing activated carbon-persimmon tannin compound absorbent

A composite adsorption and activated carbon technology, applied in chemical instruments and methods, adsorption water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problem of difficult removal of metal ions, etc. health benefits

Inactive Publication Date: 2012-11-07
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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  • Method for preparing activated carbon-persimmon tannin compound absorbent
  • Method for preparing activated carbon-persimmon tannin compound absorbent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

[0027] 1) Pretreatment of activated carbon: ①Add 100g of activated carbon to 500ml of distilled water at 95-100°C and stir for 1 hour, then stir for 1 hour (this time the stirring is to continue stirring for 1 hour after stopping heating to achieve the purpose of sufficient water washing, and the temperature should be adjusted accordingly. No strict requirements;); Suction filtration to obtain solid; ② Pickling: Add 250ml of hydrochloric acid solution with a concentration of 5-6mg / L to the obtained solid, heat to 90-100°C and stir for 1h, then let stand for 24h, use for suction filtration Wash with distilled water for 3 to 5 times until the pH of the final rinse solution is 5.0 to 6.0;

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

[0029] ④ The solid obtained after pickling was dried in an oven at 105°C to constant weight to obtain the tr...

Embodiment 2

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

[0035] 1) pretreatment of activated carbon: the pickling process of step 2. repeats 4 times, and all the other are with the step 1) of embodiment 1;

[0036] 2) Stir magnetically for 12 hours, 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, it comprises the steps:

[0039] 1) Pretreatment of activated carbon: ①Add 100g of activated carbon to 500ml of distilled water, boil and stir for 1h, then stir for 1h; filter to obtain solid; ②Pickling: add 250ml of hydrochloric acid with a concentration of 5-6mg / L to the obtained solid solution, heated to 90-100°C and stirred for 1 hour, then allowed to stand for 24 hours, filtered and washed with distilled water for 3 to 5 times until the pH of the final rinse solution was 5.0 to 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 in an oven at 95°C to constant weight to obtain the treated activated carbon for subsequent use;

[0042] 2) Stir magnetically for 24 hours, dry in an oven at 85° C., and the rest are the same as 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 activated carbon-persimmon tannin composite adsorbent. The composite adsorbent is suitable for treating industrial wastewater containing heavy metal ions and purifying and treating residential water. Background technique [0002] Among the many environmental pollutions, heavy metals can easily enter the human body through the food chain because they cannot be degraded naturally, seriously endangering 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. They have become important sources of pollution in sewage and have attracted people's attention. There are strict regulations limiting the amount allowed. [0003] At present, domestic methods for removing lead and cadmium in water include chemical prec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/22B01J20/30C02F1/28C02F1/62
Inventor 王勇李世安
Owner HUBEI SHIWEITIAN PHARMA TECH
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