CAJ | 학술논문

　　以钙基膨润土为原料，四乙烯五胺(TEPA)为改性剂，采用溶液法制备氨基化膨润土。最佳制备条件为：反应液固比40∶1(mL/g)、膨润土与四乙烯五胺固液比1∶0.05(g/mL)、反应时间5 h、反应温度25℃。采用傅里叶变换红外光谱(FTIR)、X射线衍射分析(XRD)技术对改性前后膨润土进行了表征，证实TEPA已成功负载到膨润土上，没有改变膨润土原有晶体结构。对氨基膨润土吸附去除模拟废水中Cu2+、Ni2+、Cd2+进行了研究，结果表明，氨基化膨润土对这3种重金属离子的饱和吸附容量分别达到450、300、230 mmol/kg，吸附能力都明显优于原土，分别是原土的14.88、8.88、13.05倍。氨基膨润土对这3种金属离子的吸附容量大小与四乙烯五胺形成的络合物的稳定性有关。
　　이개기팽윤토위원료，사을희오알(TEPA)위개성제，채용용액법제비안기화팽윤토。최가제비조건위：반응액고비40∶1(mL/g)、팽윤토여사을희오알고액비1∶0.05(g/mL)、반응시간5 h、반응온도25℃。채용부리협변환홍외광보(FTIR)、X사선연사분석(XRD)기술대개성전후팽윤토진행료표정，증실TEPA이성공부재도팽윤토상，몰유개변팽윤토원유정체결구。대안기팽윤토흡부거제모의폐수중Cu2+、Ni2+、Cd2+진행료연구，결과표명，안기화팽윤토대저3충중금속리자적포화흡부용량분별체도450、300、230 mmol/kg，흡부능력도명현우우원토，분별시원토적14.88、8.88、13.05배。안기팽윤토대저3충금속리자적흡부용량대소여사을희오알형성적락합물적은정성유관。
In this paper, a new amine-modified bentonite was prepared by solution method with the Ca-base bentonite as raw materials and tetraethylenepentamine(TEPA) as modifier. The optimal conditions for the preparation were obtained, the proportion between liquid and solid reactant was 40∶1 (mL/g), the ratio of bentonite and TEPA was 1∶0.05 (g/mL), the reaction time was 5 h and the reaction temperature was 25℃. The original bentonite and amine-modified bentonite were characterized by FTIR and XRD, the results indicated that TEPA was incorporated onto bentonite successfully, but the original crystal structure of bentonite was not changed. The adsorption experiments of amine-modified bentonite to Cd2+, Ni2+, Cu2+in simulated wastewater were carried out, the results showed that the saturated adsorption capacity were 450, 300, 230 mmol/kg, respectively. The adsorption ability of amine-modified bentonite to Cd2+, Ni2+, Cu2+were much better than Ca-basebentonite, were 14.88, 8.88 and 13.05 times as much as original bentonite, respectively. The adsorption capacity was in accord with the complexing stability constant of metal ions and TEPA.