High-performance edible fungus slag activated carbon and preparation method thereof

Abstract

The invention provides a preparation method of high-performance edible fungus slag activated carbon. The preparation method comprises (1) drying edible fungus slag and then crushing the dried edible fungus slag, (2) uniformly mixing the dried edible fungus slag powder and 25 to 30 g / 100 ml of an activator aqueous solution according to a mass ratio of 1: 5-6, carrying out impregnation at a temperature of 30-40 DEG C for more than or equal to 20h, carrying out filtration, drying the filter cake and carrying out activation at a temperature of 750 DEG C in a nitrogen atmosphere for 4.5h, (3) cooling the product to the room temperature, carrying out pickling, then carrying out washing until pH of 7 and carrying out drying. The activator comprises sodium hydroxide, potassium hydroxide and potassium carbonate according to a weight ratio of 2: 1: 5. The activated carbon has very excellent adsorption effects on methylene blue and heavy metal copper. Aiming to methylene blue, the adsorption capacity is 600 mg / g. Aiming a heavy metal copper, the adsorption capacity is 222 mg / g. An iodine adsorption value is 2300 mg / g.

Description

technical field [0001] The invention belongs to the field of activated carbon preparation, in particular to a high-performance edible fungus residue activated carbon and a preparation method thereof. Background technique [0002] Edible fungi are one of people's favorite foods. In recent years, as their nutritional value has attracted more and more attention, the scale of their breeding has also continued to expand, and the problem of disposal of waste mushroom residues produced by their processing has become increasingly prominent. . [0003] In the agricultural product processing industrial park, the treatment of heavy metals and dyes is also one of the key tasks. However, the cost of using commercially available treatment products (such as commercially available activated carbon) is relatively high, and it is not suitable for large-scale application. [0004] For the treatment of pollutant emissions in an industrial park, in order to minimize the cost, it is generally ne...

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Problems solved by technology

[0006] However, there is still very little research in the field of preparing activated carbon from edible fungus residues. There is still a lack of feasible research ideas on how to optimize the preparation process of this type of activated carbon according to the characteristics of edible fungi residues.

"Sawdust Type Lentinus Mushroom Slag Activated Carbon and Its Preparation Method" has carried out a certain discussion in this regard, but the adsorption capacity of the activated carbon obtained is not satisfactory, and the adsorption capacity for methylene blue is less than 200mg / g

However, the adsorption effect of the activated carbon obtained by the two methods on methylene blue is still less than 200mg / g

[0007] In summary, the prior art has not yet found a preparation method for the preparation of high-performance edible fungus residue activated carbon, making it difficult for the obtained activated carbon to replace commercial activated carbon and cannot be put into practical applications.

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