纳米零价铁去除溶液中U(Ⅵ)的研究

基金项目:

核资源与环境省部共建国家重点实验室项目(101111)

国家自然基金(41162007)

Removal of U（Ⅵ） from Aqueous Solution by Nanoscale Zero-Valent Iron

1. China Institute ofAtomic Energy, Beijing, 102413, China;
2. State Key Laboratory Breeding Base of Nuclear Resources and Environment, East China Institute ofTechnology, Nanchang, 330013, China

摘要: 采用KBH₄还原Fe³⁺制备纳米级零价铁,去除溶液中以铀酰离子形式(UO₂²⁺)存在的六价铀[U(Ⅵ)],考察纳米零价铁(NZVI)投加量、溶液pH值、U(Ⅵ)初始质量浓度以及时间等因素对铀去除效果的影响。实验结果表明:NZVI对U(Ⅵ)有很好的去除效果,当溶液pH=5.5、投加量为1.0 g/L、U(Ⅵ)初始质量浓度为45 mg/L、吸附时间为2.5 h时,对U(Ⅵ)的去除率为98.98%,吸附量为27.22 mg.g^-1。
- 纳米零价铁 /
- 铀 /
- 去除率
Abstract: Nanoscale zero-valent iron(NZVI) was synthesized in aqueous solutions by reduction of Fe³⁺with KBH₄.Removal of U(Ⅵ) by NZVI was investigated to understand the effect of dosages of NZVI,pH value of solution,initial concentrations of U(Ⅵ) and contact time.The results showed that:NZVI has very good removal effect on U(Ⅵ),and when pH value of solution is 5.5,the initial concentration of U(Ⅵ) is 45 mg/L,the dosage of NZVI is 1.0 g/L,the contact time is 2.5 h,the removal rate and adsorption capacity reached 98.98% and 27.22 mg·g^-1 respectively.
- Nanometer zero-valent iron（NZVI） /
- Uranium /
- Removal rate