외장재의 산·알카리 활성화에 따른 표면 및 흡착특성

초록

Large amounts of ash have been discharged from incinerator. But only small part of them is recycled. Therefore it is needed how to raise the recyclability. Recently photochemical smog becomes urban environmental problem. It is caused by several contaminants, such as NOx and VOCs. But it is difficult to reduce the emission of VOCs, because it is discharged from fugitive emission. In this study, we researched the method to raise the recyclability of ash and to reduce VOCs concentration in the ambient air. Firstly, we prepared the brick with ash. And then we endowed the adsorptivity on it. The brick was activated by HNO_3 and NaOH. CEC value was increased from 2.3 meq/100 g to 17.2 ~ 36.6 meq/100 g by the activation. And also, BET was increased from 2.7 m^2/g to 3.4 ~ 4.8 m^2/g. We acted the adsorption experiment to evaluate the adsorption characteristics of the brick using benzene and MEK. According to the results, the breakthrough time of Benzene and MEK increased about 2 times when treated NaOH surface activate, but HNO_3 surface activate showed a slightly decreased.

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