Preparation method of special modified active carbon for removing mercury

Abstract

The invention discloses a preparation method of special modified active carbon for removing mercury. The method comprises the following steps of: washing wooden particle active carbon through hydrochloric acid and distilled water, and then drying the washed wooden particle active carbon to standby; heating the active carbon and the hydrogen peroxide with the concentration being 25 to 30wt% at the temperature of 50 to 70 DEG C for 2 to 4h according to the mass-to-volume ratio of 6g:(15-10)ml, and then carrying out the ultrasonic treatment on the active carbon for 20 to 40min; and standing, filtering, drying, washing and drying the active carbon to obtain the special modified active carbon for removing the mercury. The special modified active carbon has high mercury removal efficiency, and the maximal mercury adsorption volume can reach 5.3mg / g and is 1.5 times that of unmodified active carbon.

Description

technical field

[0001] The invention belongs to the technical field of application of carbonaceous materials, and mainly relates to a method for preparing modified activated carbon specially used for high-efficiency mercury removal. Background technique

[0002] Mercury is a pollutant that is transmitted through the atmosphere, so its pollution has spread to every corner of the world. Mercury pollution has become another global environmental problem after climate change. Mercury pollution prevention needs and has caused more and more widespread s concern. The sources of mercury environmental pollution are mainly natural release and man-made. With the increasingly complex and frequent human social activities, anthropogenic sources have become very important, and coal burning and waste incineration have become the most important sources of mercury pollution emissions. According to statistics, the emission of mercury in flue gas in the United States is as high as 158t / a each ...

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