期刊论文

Adsorption mechanism of uranium of immobilizing Aspergillus niger activated carbon

Ding, De-Xin(dingdxzzz@163.com)

中文

中国有色金属学报

1004-0609

2016

26

4

936-945

10.19476/j.ysxb.1004.0609.2016.04.027

国家自然科学基金重点资助项目(U1401231) 国家自然科学基金资助项目(11505093,51574152) 湖南省教育厅资助项目(13C800) 衡阳市科技局资助项目(2013KS31) 南华大学创新训练中心“大学生研究性学习和创新性实验计划”校级项目(201412,201422,201501) 南华大学“铀矿山岩土工程灾害预测与控制”创新团队项目(NHCXTD04)~~

本校为其他机构

采用海藻酸钠包埋黑曲霉及活性炭粉末的方法制备固定化黑曲霉活性炭微球,利用静态吸附试验研究铀溶液的p H值、初始铀浓度、吸附时间、黑曲霉粉末与活性炭粉末质量的配比及固定化黑曲霉活性炭微球的投加量等因素对其吸附铀的影响。通过对动力学模型、等温吸附模型进行拟合,研究固定化黑曲霉活性炭吸附铀的行为。采用扫描电镜、能谱仪和红外光谱仪分析吸附前后固定化黑曲霉活性炭微球表面的形貌、化学组成和官能团结构的变化,进而探讨吸附过程可能涉及的反应机理。结果表明:固定化黑曲霉活性炭吸附铀的最佳条件为p H值为5.0,铀初始浓度为1 mg/L,固定化黑曲霉活性炭微球投加量为0.3 g/L,9 h即达到...

Immobilizing Aspergillus niger activated carbon was made from Aspergillus niger and activated carbon by embedding with the Na-alginate. The effects of pH, initial concentration of uranium, contact time, the mass ratio of Aspergillus niger powder and activated carbon powder and the dosage on the biosorption of uranium from aqueous solutions by immobilizing Aspergillus niger activated carbon were investigated. The biosorption performances of the immobilizing Aspergillus niger activated carbon for uranium (VI) were investigated by correlating the experimental datas with the kinetic models and iso...