Preparation method of porous biological carbon heavy metal adsorbing material based on cotton straw

A bio-carbon material and cotton straw technology, applied in the fields of phytochemistry and adsorption science, can solve the problems of poor adsorption effect of heavy metals, and achieve the effects of favorable adsorption, low price, and lower sintering temperature

Active Publication Date: 2015-09-30
WESTERN MINING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The carbonized material prepared by this method does not pre-treat the cotton stalks, the carbonized product has few micropores, and the carbonized product

Method used

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  • Preparation method of porous biological carbon heavy metal adsorbing material based on cotton straw
  • Preparation method of porous biological carbon heavy metal adsorbing material based on cotton straw
  • Preparation method of porous biological carbon heavy metal adsorbing material based on cotton straw

Examples

Experimental program
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Effect test

Embodiment 1

[0033] Step 1, take the cotton stalks and wash them with ultrapure water for 5 times, then soak the cotton stalks in 20% ZnCl 2 solution, stirred and impregnated at room temperature for 10 hours, and then dried the impregnated cotton stalks at 50°C;

[0034] Step 2: Take the dried cotton stalks in step 1 and put them into a tubular electric furnace, protect them with nitrogen, raise the temperature to 600°C at a rate of 10°C / min, then heat-preserve and calcinate for 1 hour, and grind the calcined products into powder. Add 0.5 parts by weight of powder and 30 parts by weight of ultrapure water into the hydrothermal reaction kettle, stir for 8 hours until it swells completely, then heat to 150°C, react for 10 hours, and centrifuge and dry the reaction product to obtain a biochar material;

[0035] Step 3, adjust the pH of the aqueous ethanol solution to 3 with an acetic acid solution with a volume fraction of 6%, add 3-mercaptopropyltriethoxysilane into the pH-adjusted aqueous e...

Embodiment 2

[0037] Step 1, take the cotton stalks and wash them 10 times with ultrapure water, then soak the cotton stalks in 50% ZnCl 2 solution, stirred and impregnated at room temperature for 15 hours, and then dried the impregnated cotton stalks at 70°C;

[0038] Step 2: Take the dried cotton stalks in step 1 and put them into a tubular electric furnace, protect them with nitrogen, raise the temperature to 850°C at a rate of 10°C / min, then heat-preserve and calcinate for 3 hours, and grind the calcined products into powder. Add 1 part by weight of powder and 50 parts by weight of ultrapure water into the hydrothermal reaction kettle, stir for 12 hours until it swells completely, then heat to 200°C, react for 15 hours, and centrifuge and dry the reaction product to obtain a biochar material;

[0039] Step 3, adjust the pH of the aqueous ethanol solution to 4 with an acetic acid solution with a volume fraction of 10%, add 3-mercaptopropyltriethoxysilane into the pH-adjusted aqueous etha...

Embodiment 3

[0041] Step 1, take the cotton stalks and wash them 8 times with ultrapure water, then soak the cotton stalks in 30% ZnCl 2 solution, stirred and impregnated at room temperature for 12 hours, and then dried the impregnated cotton stalks at 60°C;

[0042] Step 2: Take the dried cotton stalks in Step 1 and put them into a tubular electric furnace, protect them with nitrogen gas, raise the temperature to 800°C at a rate of 10°C / min, then heat-preserve and calcinate for 2 hours, and grind the calcined products into powder. Add 0.5 parts by weight of powder and 40 parts by weight of ultrapure water into the hydrothermal reaction kettle, stir for 10 hours until it swells completely, then heat to 180°C, react for 12 hours, and centrifuge and dry the reaction product to obtain a biochar material;

[0043] Step 3, adjust the pH of the aqueous ethanol solution to 3.5 with an acetic acid solution with a volume fraction of 7%, add 3-mercaptopropyltriethoxysilane into the pH-adjusted aqueo...

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Abstract

The invention discloses a preparation method of a porous biological carbon heavy metal adsorbing material based on cotton straw. The preparation method comprises the following steps: (1) adding the cotton straw into a ZnCl2 solution, carrying out stirring and impregnation for a certain time, and drying; (2) placing the dried cotton straw into an electric tube furnace for high-temperature calcination, grinding the calcined product into powder, adding the powder and ultrapure water into a hydrothermal reaction kettle, stirring till swelling is sufficient, heating for a reaction, and conducting centrifugal drying on the reaction product, so as to obtain a biological carbon material; (3) adjusting the pH of an ethanol aqueous solution with an acetic acid solution, adding 3-mercaptopropyl triethoxy silane into the ethanol aqueous solution, and carrying out oscillation to obtain a modified liquid; adding the biological carbon material into the modified liquid, carrying out oscillation and filtration, drying the obtained solid, washing the dried solid with an ethanol aqueous solution, and drying to obtain the biological carbon heavy metal adsorbing material. The preparation method is simple, and easy to operate; the biological carbon heavy metal adsorbing material prepared according to the method adopts a porous honeycomb-shaped structure, is large in specific surface area, high in heavy metal adsorbing property, and high in economic value and environment-friendly meaning.

Description

technical field [0001] The invention belongs to the field of phytochemistry and adsorption science, and in particular relates to a preparation method of a porous biological carbon heavy metal adsorption material based on cotton stalks. Background technique [0002] In recent years, due to the rapid development of industry, the dye industry, petrochemical industry, electroplating industry and mechanical processing industry have developed rapidly one after another. Most of the wastewater generated by these industries is directly discharged into lakes, rivers, and oceans, and their water bodies contain more or less Harmful heavy metal ions, which not only pollute the water environment, make the water quality deteriorate rapidly, but also increase the amount of sewage discharge year by year. Water pollution, especially heavy metal ion pollution in water, has become an indisputable fact, seriously endangering the survival of various organisms including human beings. The threat of...

Claims

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Application Information

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IPC IPC(8): B01J20/22B01J20/28B01J20/30C02F1/28C02F1/62
Inventor 张红平陈盼盼罗学刚周建张亚萍刘焕德罗仙平
Owner WESTERN MINING CO LTD
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