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Preparation method of natural shell adsorbent

A technology of adsorbent and shell, which is applied in the field of natural shell adsorbent and its preparation, can solve the problems of unsatisfactory adsorption effect, oil absorption and degradation effect, etc., and achieve the effect of reducing waste and improving adsorption effect

Inactive Publication Date: 2014-02-19
ZHEJIANG OCEAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But this invention has not yet reached ideal adsorption effect
[0008] Although the above-mentioned prior art discloses various oil-absorbing agents and preparation methods thereof, the oil-absorbing and degradation effects are not satisfactory enough.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The preparation method of the present embodiment comprises the following steps:

[0026] ⑴Cleaning of shells: use hydrochloric acid to clean the organic and inorganic pollutants on the surface of pearl mother-of-pearl shells.

[0027] (2) Drying of shells: Put the cleaned shells in an electric blast drying oven, set the temperature at 85°C until dry, then place them in a muffle furnace for calcination at 1000°C for 1.5h.

[0028] (3) Preliminary crushing of shells: Put the obtained dried and calcined shells into a pulverizer for preliminary crushing to obtain coarse shell powder with larger particles.

[0029] ⑷Deep crushing, grinding, sieving and activation of shells: add an appropriate amount of sodium hexametaphosphate dispersant to the granular coarse shell powder, put it into a ball mill, carry out further crushing and grinding, and pass through a 200-mesh sieve to obtain shell powder ; Activate the shell powder: place it in a state of pre-burning at 60°C to evapo...

Embodiment 2

[0032] (1) Cleaning of shells: Use sulfuric acid to clean the organic and inorganic pollutants on the surface of pearl mother-of-pearl shells.

[0033] (2) Drying of shells: Put the cleaned shells in an electric blast drying oven, set the temperature at 85°C until they are dried, and then place them in a muffle furnace for calcination at 1000°C for 1.5h.

[0034] (3) Preliminary crushing of shells: Put the obtained dried and calcined shells into a pulverizer for preliminary crushing to obtain coarse shell powder with larger particles.

[0035] ⑷Deep crushing, grinding, sieving and activation of shells: add an appropriate amount of sodium hexametaphosphate dispersant to the granular coarse shell powder, put it into a ball mill, carry out further crushing and grinding, and pass through a 200-mesh sieve to obtain shell powder ;Activate the shell powder: place it in a state of pre-burning at 65°C to evaporate the water and fully dehydrate it.

[0036] ⑸ Shell powder loading TiO ...

Embodiment 3

[0038] (1) Cleaning of shells: Use sulfuric acid to clean the organic and inorganic pollutants on the surface of pearl mother-of-pearl shells.

[0039](2) Drying of shells: Put the cleaned shells in an electric blast drying oven, set the temperature at 85°C until they are dried, and then place them in a muffle furnace for calcination at 1000°C for 1.5h.

[0040] (3) Preliminary crushing of shells: Put the obtained dried and calcined shells into a pulverizer for preliminary crushing to obtain coarse shell powder with larger particles.

[0041] ⑷Deep crushing, grinding, sieving and activation of shells: add an appropriate amount of sodium hexametaphosphate dispersant to the granular coarse shell powder, put it into a ball mill, carry out further crushing and grinding, and pass through a 200-mesh sieve to obtain shells powder; activate the shell powder: place it in a pre-fired state at 70°C to evaporate the water and fully dehydrate it.

[0042] ⑸ Shell powder loading TiO 2 Pre...

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Abstract

The invention relates to a preparation method of a natural shell adsorbent. The preparation method comprises the following steps of 1, cleaning the surfaces of shells by an acid solution to remove organic and inorganic matters on the surfaces of the shells, 2, drying the cleaned shell and carrying out calcination, 3, carrying out primary crushing on the dried shells subjected to calcination, 4, carrying out deep crushing and grinding on the shells subjected to the primary crushing, carrying out screening to obtain shell powder, carrying out low-temperature pre-sintering on the shell powder to evaporate moisture so that full dehydration is realized, and 5, preparing TiO2 sol, treating the dehydrated shell powder by the TiO2 sol so that the shell powder is loaded with the TiO2 sol, and orderly carrying out drying, washing, drying and sintering to obtain shell powder-immobilized TiO2. The preparation method utilizes shells as adsorbent raw materials, reasonably utilizes waste natural resources and changes waste into valuables. Through TiO2 loading, the preparation method improves adsorption effects. The natural shell adsorbent realizes recycle of adsorbed oil and reduces resource waste.

Description

technical field [0001] The invention relates to a natural shell adsorbent for removing oil stains on the ground or sea and a preparation method thereof. Background technique [0002] At present, there are more than 200 major pollution sources of various types along the coast of China. The main pollutants discharged into the sea by these pollution sources are petroleum hydrocarbons, heavy metal pollutants and organic pollutants, and the main way for river-borne pollutants to enter the sea. China's coastal oil pollution is relatively serious. Oil is the largest amount of pollutants entering the sea. Oil pollution is extremely harmful to marine biological resources. Oil is easy to form a film on the water surface, which organizes sea-air exchange and reduces dissolved oxygen in seawater. , solid oil pollution can cause a large area of ​​hypoxia, the oil film oil block can stick a large number of fish eggs and young fish, causing them to suffocate and die, can deform the young f...

Claims

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Application Information

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IPC IPC(8): B01J20/06B01J20/30
Inventor 宋文东应知伟高良军纪丽丽郭健王亚宁韩丝银王雅颖
Owner ZHEJIANG OCEAN UNIV
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