期刊论文

Experimental Investigation on Adsorption of U(Ⅵ) by Chitosan-biochar Composite

中文

原子能科学技术

1000-6931

2019

53

8

1350-1358

10.7538/yzk.2018.youxian.0780

11475080:国家自然科学基金 51408293:国家自然科学基金 2018KYY097:南华大学研究生科学基金资助项目

本校为第一机构

以壳聚糖(CTS)和生物炭(AC)为原料,采用原位沉淀法制备了壳聚糖-生物炭(CTS-AC)复合材料,研究了吸附时间、铀初始浓度、初始pH值、温度和干扰离子等因素对CTS-AC吸附U(Ⅵ)的影响,探讨了CTS-AC对U(Ⅵ)的吸附动力学、等温线,采用傅里叶红外光谱(FT-IR)、X射线衍射(XRD)、扫描电镜(SEM-EDS)及比表面积分析(BET)等手段进行了相关机理分析。实验结果表明,CTS-AC吸附U(Ⅵ)的最佳条件为:pH=4、CTS-AC投加量0.8~1g/L、吸附时间240min,在此条件下,最大吸附率可达94.85%。CTS-AC对U(Ⅵ)的吸附等温线模型符合Langmuir模型,U(Ⅵ)的吸附动力学符合准二级模型;高浓度Cu~(2+)对CTS-AC吸附U(Ⅵ)的抑制作用明显;F...

Chitosan-biochar (CTS-AC)composites were prepared by using chitosan (CTS)and biochar(AC)as raw materials.The effect of initial U(Ⅵ)concentration, reaction time,initial pH,reaction temperature and interference ion on the adsorption of U(Ⅵ)by CTS-AC was investigated,and the adsorption behavior of U(Ⅵ)by CTS-AC was characterized by FT-IR,XRD,SEM-EDS and specific surface area analysis(BET). The results show that the optimum conditions for the adsorption of U(Ⅵ)by CTS-AC are pH=4,dosage of CTS-AC 0.8-1 g/L and adsorption time 240 min.Under these...