期刊论文

中文

环境工程学报

1673-9108

2015

9

2

705-710

51174117:国家自然科学基金 2014xj08:湖南城市学院科技项目 13B009:湖南省教育厅优秀青年项目

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采用腐殖酸(HA)修饰凹凸棒(ATP)制备得到腐殖酸/凹凸棒(HA/ATP),用于去除废水中的U(VI)。通过静态吸附实验,研究了溶液初始p H、投加量、吸附时间和初始浓度对吸附的影响,并用扫描电镜(SEM),X射线能谱图(EDS),傅里叶红外光谱仪(FITR)分析吸附机理。实验结果表明,去除率随时间的增大而增大,在120 min内可以达到平衡;吸附剂投加量越大,溶液p H=6左右时越有利于U(VI)的去除;HA/ATP能多次重复使用,且经过5次吸附解吸后对U(VI)的去除率仍能达到96%。吸附过程均符合Langmuir和Frendlich等温方程。较之准一级动力学,准二级动力学模型能更好地拟合实验数据。SEM-EDS、FITR分析结果表明,U(VI)被成功地吸附...

Attapulgite modified by humic acid, was used to develop a novel adsorbent to remove the uranium(VI) ions from the wastewater of uranium-contained. The adsorption of U(VI) from aqueous solution to HA/ATP was studied as a function of pH, dosage, contact time, initial concentration. The adsorbent was characterized by scanning electron microscopy (SEM) with EDS analysis and Fourier transform infrared (FTIR). The results of adsorption experimental showed that the adsorption equilibrium time of U(VI) onto HA/ATP was 120 min, and high adsorbent dosage...