| 摘要 |
The invention relates to a process for active coal modification, which may be used as selective adsorbent for water purification from ammonia and ammonium ions. The process, according to the invention, includes oxidation of the active coal, obtained from nutshell with 30% hydrogen peroxide during 72 hours at the room temperature, or concentrated azotic acid during 8à10 hours at the temperature of 95à105?C, or ozone in demineralized water during 1 hour at the room temperature, treatment with 1à2% alkaline solution up to the complete removal of humic acids, neutralization with 0,1 N solution of hydrochloric acid, washing with demineralized water, drying at the temperature of 100à105? up to the constant mass, impregnation during 60à80 hours with ions of cobalt(II), or copper(II), or nickel(II), or silver(II) from the solutions of the corresponding nitrates, taken in the quantity of 350à450 mg/L, with subsequent washing with demineralized water and drying at 100à105?C up to the constant mass.
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