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Preparation method of bamboo modified active carbon adsorbent for processing phenol wastewater

A technology of activated carbon adsorption and phenol wastewater, applied in chemical instruments and methods, other chemical processes, etc., can solve problems such as differences in sexual performance, different sources of activated carbon, and different production processes

Inactive Publication Date: 2012-02-15
ZHEJIANG SHUANGLIANG SUNDA ENVIRONMENTAL PROTECTION CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of activated carbon to adsorb phenolic compounds has achieved certain results, but due to the different sources of activated carbon and the different production processes, the performance of the activated carbon varies significantly.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment １

[0020] A preparation method of a bamboo modified activated carbon adsorbent for treating phenol-containing wastewater, comprising the following steps: cutting fresh moso bamboo into small bamboo pieces, putting them in a muffle furnace, and drying them at 180°C for 24 hours; then raising the temperature to Keep at 320°C for 24 hours to cause the thermal decomposition reaction of the bamboo block, and the chemical composition in it changes, mainly because some unstable components in the bamboo block undergo thermal decomposition reactions, such as cellulose and hemicellulose decompose into carbon dioxide and carbon monoxide. and acetic acid, etc.; continue to heat up to 420°C and keep for 36 hours, the bamboo block continues to undergo thermal decomposition reaction, generating a large number of decomposition products, such as alcohols, wood tar, methane, ethylene and other flammable gases; finally the temperature rises to 500°C, keep 24h, discharge the volatile substances remai...

Embodiment 2

[0022] The adsorption performance of the finished product was detected by the dynamic adsorption method: accurately weigh 0.1 g of the bamboo charcoal powder prepared in Example 1, put it into a 50 mL series conical flask, add 25 mL of a phenol solution with a concentration of 1000 mg / L, and put it into a shaker In the bed, adjust the temperature of the shaker to 30°C, and shake at a speed of 120 rpm. After three hours, take a part of the sample for centrifugation, take the supernatant for measurement, and measure the phenol concentration by ultraviolet spectrophotometry. Through the determination of three sets of parallel samples, the concentrations of phenol solution were 126 mg / L, 135 mg / L, 118 mg / L, and the adsorption rates were 87.3%, 86.5%, and 88.2%, respectively. The above data have fully demonstrated that the bamboo modified activated carbon prepared by the method can efficiently adsorb phenolic compounds.

Embodiment 3

[0024] The adsorption performance of the finished product is also detected by dynamic adsorption method: accurately weigh 0.1 g bamboo activated carbon sample and put it into a 50 mL series Erlenmeyer flask, add 25 mL of 1000 mg / L 2-chlorophenol solution, and put it in a shaker , adjust the temperature of the shaker to 30°C, and oscillate at a speed of 120 rpm. After three hours, take the experimental sample for centrifugation, take the supernatant for measurement, and measure the phenol concentration by ultraviolet spectrophotometry. Through the determination of three groups of parallel samples, the concentrations after adsorption were 156 mg / L, 167 mg / L, and 163 mg / L, and the adsorption rates were 84.4%, 83.4%, and 83.7%, respectively. The above data have fully demonstrated that the bamboo modified activated carbon prepared by the method can efficiently adsorb phenolic compounds.

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Abstract

The invention discloses a preparation method of a bamboo modified active carbon adsorbent for processing phenol wastewater. With Moso bamboo being used as a raw material, the preparation method comprises four steps of bamboo carbonization, grinding and sieving, soda acid processing, high temperature activation and the like. By controlling the concentration of an acid-base solution for immersing active carbon and controlling a series of physical and chemical treatment processes such as high temperature activation temperature and time of active carbon, the bamboo-based active carbon is optimized and the modified active carbon adsorbent which can efficiently adsorb phenolic compounds and has a good effect of adsorbing phenolic compounds with the adsorption rate being as high as 80%.

Description

technical field [0001] The invention relates to a preparation method of an activated carbon adsorbent, in particular to a preparation method of a bamboo modified activated carbon adsorbent used for adsorbing phenolic compounds in phenol-containing wastewater. Background technique [0002] Phenol pollution in the environment mainly refers to the pollution of water by phenolic compounds. Phenol-containing wastewater is one of the most harmful and widely polluting industrial wastewater in the world today, and is an important source of water pollution in the environment. Phenol is contained in the wastewater discharged from many industrial fields such as gas, coking, oil refining, metallurgy, machinery manufacturing, glass, petrochemical, wood fiber, chemical organic synthesis industry, plastic, medicine, pesticide, paint and other industries. If the waste water is not treated, it can pollute air, water, soil and food if it is directly discharged and irrigated farmland. the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/08B01J20/20
Inventor 郑展望吴笑
Owner ZHEJIANG SHUANGLIANG SUNDA ENVIRONMENTAL PROTECTION CO LTD
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