期刊论文

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

Xie, Shuibo(xiesbmr@263.net)

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() concentration, reaction time, initial pH, reaction temperature and interference ion on the adsorption of U() by CTS-AC was investigated, and the adsorption behavior of U() 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() by CTS-AC are pH=4, dosage of CTS-AC 0.8-1 g/L and adsorption time 240 min. Un...