【作者】 刘文娟； 曾艳红；

【Author】 LIU Wen-juan,ZENG Yan-hong (College of Chemistry and Chemical Engineering,University of South China,Hengyang of Hunan Prov.421001,China)

【机构】 南华大学化学化工学院；

【摘要】 通过实验研究了有机改性蛭石对水中铀的吸附性能,探讨了吸附剂用量、初始pH、铀初始浓度、吸附时间等因素对吸附效果的影响,通过正交试验得出了吸附处理中的主要影响因素。最后对蛭石有机改性吸附铀试验原理进行了初步研究与分析。实验结果表明:用CTMAB(十六烷基三甲基溴化铵)处理蛭石粉末后得到的有机改性蛭石对铀有较强的吸附能力;用蛭石与絮凝剂联合处理低浓度的铀溶液有协同作用,能显著提高其吸附能力;影响有机改性蛭石对铀吸附的因素有:吸附剂用量、pH、铀溶液初始浓度和吸附时间。增加吸附剂用量和吸附时间、降低铀初始浓度都能提高对铀的去除率,但比吸附量却随着吸附剂用量的增加而减少,随着含铀溶液初始浓度的增加而增加。有机改性蛭石对铀的去除率和吸附量在pH为5～6.5时达到最大值。更多还原

【Abstract】 The adsorption capability of uranium on organic modified Vermiculite was studied.The influence factors of the amount of adsorbent,initial pH,initial concentration of uranium and adsorption time have been investigated too. Through the orthogonal test,the primary factors of impacting the adsorption treatment can be obtained.Finally,the preliminary research and analysis on the principle adsorption of organic modified vermiculite test of uranium have been conducted.The results show that;Modifying Vermiculite by CTMAB makes Vermiculite adsorption capacity stronger when treating solution containing uranium.Combined flocculants with vermiculite to treat with low concentration of uranium solution has synergy,significantly enhancing its adsorption capacity.The impact factors of organic modified vermiculite’s adsorption of uranium are adsorbent dosage,pH,initial concentration of uranium solution and adsorption time.The best adsorption pH is between 5~6.5.更多还原