In order to study the changes in properties and structure of impregnated activated carbon(AC) caused by aging,the change characteristics of key physical properties and microstructure of the impregnated AC aged in-place application were analyzed experimentally.It was found that the efficiency of aged impregnated AC adsorbing radioactive methyl iodide was not up to eligibility criteria,however,the physical properties in particle size and strength of theAC did not change significantly,which still met the standard.But its pH value decreased significantly from 9.6 to about 7,which was consistent with the declining trend of iodine removal efficiency and CCl4 adsorption rate.SEM and N2 adsorption tests showed that the pore structure of the AC after aging changed significantly,with channel blockage,edge severe abraded,surface area decreased and pore width increased.These changes in physical properties were one of the important reasons for the aging failure of impregnated AC.
Wang Kunjun, Wu Zhenlong, Chang Sen, Li Yongguo, Wang Jia
. Analysis of physical property of impregnated AC after aging in-place application[J]. New Chemical Materials, 2020
, 48(9)
: 164
-168
.
DOI: 10.19817/j.cnki.issn 1006-3536.2020.09.036
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