Zeolite에 의(依)한 $NH_4{^+}$의 흡착(吸着)

Adsorption of $NH_4{^+}$ by Zeolite

Zeolite에 의(依)한 $NH_4{^+}$의 흡착반응(吸着反應)에 영향(影響)을 미치는 열처리(熱處理)에 의(依)해 조사(調査)하고 배양실험(培養實驗)을 통하여 Zeolite에 흡착(吸着)된 $NH_4{^+}$의 소실량(消失量)을 조사(調査)하였다. Zeolite의 주구성점토광물(主構成粘土鑛物) Clinoptiolite와 mordenite였다. Zeolite에 의(依)한 $NH_4{^+}$의 흡착반응(吸着反應)은 4시간(時間) 진탕으로 흡착평형(吸着平衡)에 도달(到達)하였다. 열처리온도(熱處理溫度)가 높을수록 치환성(置換性) $K^+$의 합량(合量)은 증가(增加)하였으나 $NH_4{^+}$의 흡착량(吸着量)은 감소(減少)하였다. 유안(硫安)을 처리(處理)한 토양(土壤)을 담수상태(湛水狀態)에서 배양(培養)한 결과(結果) 시간(時間)이 경과(經過)할수록 토양중(土壤中) $NH_4{^+}$ 잔류량(殘留量)이 감소(減少)한 반면(盤面) Zeolite에 흡착(吸着)된 $NH_4{^+}$는 동일기간(同一期間) 내(內)에 소실(消失)되지 않았다. 그러므로 Zeolite에 흡착(吸着)된 $NH_4{^+}$은 여러 가지 작용(作用)에 의(依)한 소실(消失)에 대(對)해 저항성(抵抗性)이 크다고 할 수 있다.

This study was conducted to examine the influence of heat treatment on the $NH_4{^+}$ adsorption by zeolite and to determine the $NH_4{^+}$ loss from $NH_4-$ zeolite during the incubation. The dominant clay minerals of zeolite were clinoptiloiite and mordenite. $NH_4{^+}$ adsorption by zeolite was equilibrated at a 4hrs-shaking. The content of exchangeable $K^+$ of zeolite was increased with increase in the temperature of heat treatment but the amount of $NH_4{^+}$ adsorbed by zeolite was decreased. The amount of $NH_4{^+}$ in the soil treated with ammonium sulfate was decreased during incubation under the submerged condition but the amount of $NH_4{^+}$ adsorbed by zeolite was not decreased in the same course of incubation. It was estimated that $NH_4{^+}$ adsorbed by zeolite was resistant to $NH_4{^+}$-N loss by various reactions.