Preparation method for maleic anhydride modified hydrothermal bamboo charcoal adsorbent

Abstract

The invention discloses a preparation method for a maleic anhydride modified hydrothermal bamboo charcoal adsorbent. The method is performed according to the following steps: (1) modifying hydrothermal bamboo charcoal by maleic anhydride: performing uniform mixing on the hydrothermal bamboo charcoal and the maleic anhydride, performing a reaction under the temperature condition of 120-140 DEG C for 2-6 h, performing natural cooling, placing the cooled material into distilled water, performing stirring, performing filtration, and performing washing by using distilled water to obtain a semi-finished product; and (2) performing treatment on the maleate modified semi-finished product: adding the semi-finished product into a saturated sodium bicarbonate solution, performing stirring, performingfiltration, performing washing until the obtained solution is neutral, and performing drying to obtain the finished product. The method provided by the invention has the advantages that a hydroxyl group on the surface of the hydrothermal bamboo charcoal and the maleic anhydride are subjected to an esterification reaction, the content of groups of a carboxylic acid, carbonyl, unsaturated bonds andthe like on the surface of the hydrothermal bamboo charcoal is improved, and therefore the adsorption capacity of the hydrothermal bamboo charcoal to pollutants such as cationic dyes and heavy metalions is increased; and the reaction is a solid phase reaction, does not require participation of organic solvents, and has no problems such as solvent recovery and treatment, and is a green syntheticmethod.

Description

technical field [0001] The invention relates to a preparation method of a maleic anhydride-modified hydrothermal bamboo charcoal adsorbent. Background technique [0002] Statistics from the Eighth National Forest Resources Inventory show that my country's bamboo forest area is 6.01 million hectares, and the bamboo forest area, bamboo stock, bamboo product output and export volume all rank first in the world, and bamboo processing technology and bamboo product innovation capabilities are at the world's advanced level. However, at present, the utilization rate of bamboo resources in my country is low, with a primary utilization rate of 20%-50%. There are a large amount of bamboo processing residues such as bamboo chips, sawdust, scraps, etc., and more than 11.8 million tons of unused miscellaneous bamboo and Trail bamboo. Therefore, there is an urgent need to develop clean and efficient resource utilization technologies for agricultural and forestry waste. The carbonization d...

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Problems solved by technology

However, at present, the utilization rate of bamboo resources in my country is low, with a primary utilization rate of 20%-50%. There are a large amount of bamboo processing residues such as bamboo chips, sawdust, scraps, etc., and more than 11.8 million tons of unused miscellaneous bamboo and small diameter bamboo

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