Furthermore , it was proved that either surface modification of ac by 30 % hno3 or introduction of the second cation could improve the performance of the adsorbents . in addition , the performance of cucl2 - la ( no3 ) 3 / ac ( modified by 30 % hno3 ) was improved after the first regeneration , then kept almost constant even after reused for five times 壽命實(shí)驗(yàn)表明, cucl _ 2 - la ( no _ 3 ) _ 3 /活性炭(硝酸氧化)吸附劑初次使用并經(jīng)脫附后的吸附性能比新鮮吸附劑更好,而且再經(jīng)5次使用,性能幾乎不變。