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Preparation and use method of biochar pesticide adsorbing material based on corn stalks

A corn stalk and adsorption material technology, applied in chemical instruments and methods, adsorbed water/sewage treatment, water pollutants, etc., can solve the problems of ineffective utilization of agricultural straw, poor adsorption effect, poor quality, etc., and improve quality and adsorption effect, improve granulation, improve effect

Active Publication Date: 2016-04-20
TAIYUAN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, the biological carbonaceous adsorbent made of agricultural straw has the problems of poor quality and poor adsorption effect, and the agricultural straw has not been effectively utilized.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The air-dried corn stalks are cleaned, dried at 80°C, ground, and passed through a 100-mesh sieve to obtain powdered corn stalks, and then the wax and powdered corn stalks are added to the oscillator according to the mass percentage of 1:500, Shake the mixture into a fluffy state, then cool it to room temperature; put the fluffy mixture into a heating furnace under a vacuum environment, rapidly raise the temperature to 650°C, keep it for 3 minutes, cool down to 550°C, and carbonize for 6 hours to form corn stalks Carbonized product: put the corn stalk carbonized product into deionized water, wash it and dry it, add 0.1mol / L hydrochloric acid to adjust the pH value to 6, shake it for 10 hours, separate and remove impurities by centrifuge, and wash it in deionized water to neutrality, and dried at 70-80°C to obtain corn stalk biochar pesticide adsorption material. Mix quicklime and carbonized corn stalks at a mass percentage of 1:300, then put 1 kg of the mixture of quick...

Embodiment 2

[0020] Soak the corn stalks in water for 6 days to make the corn stalks fibrous, and then air-dry them. Clean the air-dried corn stalks, dry them at 70°C, grind them, and pass through a 100-mesh sieve to obtain powdered corn stalks. , then add the wax and powdered corn stalks to the shaker according to the mass percentage of 1:800, vibrate into a fluffy mixture, and then cool it to room temperature; in a vacuum environment, put the fluffy mixture into the heating furnace, quickly Raise the temperature to 600°C, keep it for 1 minute, cool down to 550°C, and carbonize for 5 hours to form carbonized corn stalks; put the carbonized corn stalks into deionized water to wash and dry them, and add 0.1mol / L hydrochloric acid to adjust the pH during shaking The value is 5.5, shaken for 10 hours, separated by centrifuge to remove impurities, washed in deionized water until neutral, and dried at 80°C to obtain corn straw biochar pesticide adsorption material. Mix quicklime and carbonized ...

Embodiment 3

[0022]Soak the corn stalks in water for 10 days to make the corn stalks fibrous, and then air-dry them. Clean the air-dried corn stalks, dry them at 70°C, grind them, pass through a 100-mesh sieve, and then pass through a 10-mesh sieve. , filter out the powdered corn stalks larger than 100 mesh and smaller than 10 mesh to obtain the remaining powdered corn stalks, then add the wax and powdered corn stalks to the shaker according to the mass percentage of 1:1000, shake it into a fluffy mixture, and then Cool to room temperature; in a vacuum environment, put the fluffy mixture into a heating furnace, rapidly raise the temperature to 630°C, keep it for 5 minutes, cool down to 500°C, and carbonize for 6 hours to form carbonized corn stalks; put the carbonized corn stalks in Wash in deionized water and dry, add 0.1mol / L hydrochloric acid to adjust the pH value to 6.5, shake for 11 hours, separate and remove impurities by centrifuge, wash in deionized water until neutral, at 80°C dr...

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PUM

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Abstract

The invention relates to the field of removal of pesticide residue, in particular to preparation and a use method of biochar pesticide adsorbing material based on corn stalks. The preparation comprises the following steps: adding wax and corn stalk powder into an oscillator; carrying out oscillation to obtain a fluffy mixture; carbonizing the mixture in a heating furnace to obtain a corn stalk carbide; washing the corn stalk carbide in deionized water; airing the washed corn stalk carbide; adding 0.1 mol / L hydrochloric acid to adjust the pH value while oscillation is carried out; washing to obtain a neutral semi-product; drying the neutral semi-product at 70 to 80 DEG C, so as to obtain the biochar pesticide adsorbing material based on the corn stalks. The invention further discloses the use method of the biochar pesticide adsorbing material. The prepared biochar pesticide adsorbing material is high in quality, adsorption efficiency and yield.

Description

technical field [0001] The invention relates to the field of removing pesticide residues, in particular to a method for preparing and using a biochar pesticide adsorption material based on corn stalks. Background technique [0002] Pesticides have greatly contributed to modern food production and agricultural development worldwide. It is estimated that the global use of pesticides to prevent and control agricultural diseases, insects, and weeds accounts for 30% of the total grain output. my country can feed 22% of the world's population with 7% of the world's arable land, and pesticides play an extremely important role. According to data from the National Bureau of Statistics, my country's pesticide production has increased year by year. In 2014, the production of pesticide technical materials reached 3.744 million tons, of which herbicides accounted for the largest proportion, accounting for 48.2%. In the past five years, the amount of pesticides used nationwide has been ...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/30C02F1/28
CPCB01J20/20C02F1/281C02F2101/306
Inventor 张桂香刘希涛孙可赵烨何秋生
Owner TAIYUAN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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