Preparation method of eucalyptus-based magnetic activated carbon

Abstract

The invention discloses a preparation method of eucalyptus-based magnetic active carbon. The preparation method comprises the following steps: (1) sawing eucalyptus into blocks, washing and drying; then carbonizing, crushing and sieving by a 60-mesh sieve; (2) weighing eucalyptus carbon, K2CO3 and FeCl3 at a mass ratio of 1 to (0.5-1) to (0.5-2) and mixing; adding de-ionized water at a ratio of adding 10mL of the de-ionized water into 1g of the eucalyptus carbon; stirring and mixing uniformly; carrying out constant-temperature vibration and immersion for 4-7 hours in a vibrator at the temperature of 55 DEG C and the rotary speed of 100r / min-150r / min; putting a mixture into an electric heating air blowing drying oven of 110 DEG C and drying for 8-12 hours; putting the product into a muffle furnace of 600-900 DEG C to be activated for 60-120 minutes; and (4) immersing with the de-ionized water and washing with the de-ionized water until the pH of washing liquid is 6-8; and drying, grinding and crushing, and sieving by a 100-mesh sieve to obtain the eucalyptus-based magnetic active carbon. The preparation method has the advantages of abundant raw materials, simple preparation process, low cost and low energy consumption. The eucalyptus carbon can be activated, magnetized and protected in one step under a heating condition. The eucalyptus-based magnetic active carbon is easy to separate and recycle when being applied to a water treatment technology; and secondary pollution is avoided and the environmental protection is facilitated.

Description

technical field [0001] The invention belongs to the technical field of environmental purification technology and activated carbon preparation, and relates to a method for preparing eucalyptus-based magnetic activated carbon, in particular to a method for preparing magnetic activated carbon by using eucalyptus as a main material. Background technique [0002] The raw materials for preparing activated carbon include agricultural and forestry waste, coke, petroleum coke, minerals, etc. At present, my country produces a large amount of agricultural and forestry waste every year. Scholars generally believe that agricultural and forestry waste has a large development space as a raw material for activated carbon. The raw materials of agricultural and forestry waste are mainly woody materials, such as sawdust, wood and other agricultural and forestry by-products, and food processing industry waste, such as coconut shells, grapefruit peels, bagasse, orange peels, etc. Agricultural a...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for preparing magnetic activated carbon that can be activated and magnetized in one step, to solve the problem of decreased adsorption performance caused by the use of binders in finished activated carbon, to explore a new way to prepare magnetic activated carbon, and to efficiently adsorb pollutants. Guarantee the best economic and environmental benefits

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