CAJ | 학술논문

通过静态吸附实验，研究了用十六烷基三甲基溴化铵（HDTMA?Br）改性的蛭石对U（Ⅵ）的吸附行为，以及有机改性蛭石（吸附剂）用量、pH值、铀初始质量浓度、吸附时间等因素对有机改性蛭石吸附U （Ⅵ）效果的影响，从热力学和动力学方面对吸附过程进行了分析，并通过 FT‐IR和SEM 探讨了其相关吸附机理。结果表明：增加吸附剂用量、延长吸附时间和降低铀初始质量浓度都能提高有机改性蛭石对铀的去除率，最佳吸附pH值为6.5左右，120 min达到吸附平衡；用絮凝剂协同吸附能提高有机改性蛭石对铀的吸附效果；有机改性蛭石对铀的吸附遵循 Langmuir吸附等温线，符合准二级动力学方程。有机改性蛭石吸附铀前后的FT‐IR表明，—O H、Si O等基团起重要作用；SEM 分析表明，有机改性蛭石吸附U（Ⅵ）引起其形态结构的改变。
통과정태흡부실험，연구료용십륙완기삼갑기추화안（HDTMA?Br）개성적질석대U（Ⅵ）적흡부행위，이급유궤개성질석（흡부제）용량、pH치、유초시질량농도、흡부시간등인소대유궤개성질석흡부U （Ⅵ）효과적영향，종열역학화동역학방면대흡부과정진행료분석，병통과 FT‐IR화SEM 탐토료기상관흡부궤리。결과표명：증가흡부제용량、연장흡부시간화강저유초시질량농도도능제고유궤개성질석대유적거제솔，최가흡부pH치위6.5좌우，120 min체도흡부평형；용서응제협동흡부능제고유궤개성질석대유적흡부효과；유궤개성질석대유적흡부준순 Langmuir흡부등온선，부합준이급동역학방정。유궤개성질석흡부유전후적FT‐IR표명，—O H、Si O등기단기중요작용；SEM 분석표명，유궤개성질석흡부U（Ⅵ）인기기형태결구적개변。
The adsorption behavior of U (Ⅵ ) on modified vermiculite by HDTMA ?Br was studied with static experiments .The effects of the amount of adsorbent ,pH ,initial mass concentration of uranium and time on the removal rate of uranium were investiga‐ted .The unit mass of adsorption process was analyzed in thermodynamics and kinetics , and the adsorption mechanism was analyzed with FT‐IR and SEM .The results indicate that the removal rate of uranium can increase with the increase of adsorbent amount and time ,and the decrease of initial mass concentration of uranium .T he adsorption equilib‐rium tends to be achieved in 120 min ,and solution using flocculant and modified vermic‐ ulite can be improved .T he adsorption of uranium by organically modified vermiculite is a complex process ,so Langmuir monolayer adsorption theory and Freundlich adsorption theory cannot fully explain the adsorption process .The removal mechanism of uranium by using modified vermiculite fits Langmuir adsorption law ,and is in line with quasi‐second order kinetic equation .It is confirmed by FT‐IR that —OH and Si O play an important role in the adsorption of uranium .SEM show s that the adsorption of uranium using modified vermiculite causes the structure change .