羟基磷灰石负载纳米零价铁去除水溶液中铀(Ⅵ)的研究  

Removal of U(Ⅵ) in Aqueous Solution by a Compound of Hydroxyapatite and Nanoscale Zero-Valent Iron

作　　者：高芳[1] 张卫民[1] 郭亚丹[1] 李亦然[1] 潘志平[1] 

机构地区：[1]东华理工大学省部共建核资源与环境国家重点实验室培育基地,南昌330013

出　　处：《中国陶瓷》2015年第8期10-15,共6页China Ceramics

基　　金：江西省教育厅科技落地计划项目(KJLD13054);东华理工大学省部共建核资源与环境国家重点实验室培育基地项目(Z201406)

摘　　要：以羟基磷灰石为载体,通过简易可行的化学溶液法制备出羟基磷灰石负载纳米零价铁复合材料。以所制备的复合物为反应材料,通过静态实验,研究其在溶液的p H值、投加量、反应时间、铀初始浓度等不同条件下对水溶液中铀（Ⅵ）的去除效果。实验结果表明,复合材料具有较强的吸附性能,能有效去除水中铀（Ⅵ）,当溶液初始p H为4.0,复合材料投加量为1.0 g/L,反应时间为60 min,U（Ⅵ）初始浓度为10 mg/L的条件下,复合材料对水溶液中铀的去除率达到90.59-93.56%,对应吸附量为9.06-9.36 mg/g。复合材料去除铀的行为符合Langmuir等温吸附方程,符合准二级动力学方程。In this paper, the complexes with Hydroxyapatite and nanoscale zero-valent iron was synthesized inaqueous solution, and the nanoscale zero-valent iron was reduced by Fe3＋ with NaBH4.The effect factors such assolution pH value, dosages of reactive material, contact time and initial U（ VI ） concentration on removal of U（ VI ） bythe complexes with batch experiments was investigated. The results showed that U（ VI ） can be effectively removedfrom aqueous solution by the complexes, and when pH value of solution is 4, the dosage of reactive material is 1.0 g/L, the contact time is 60 min, initial U（ VI ） concentration is 10 mg/L, the U（ VI ） removal rate and adsorption capacityreached 90.59 - 93.55% and 9.06 - 9.36 mg/g respectively. The adsorption of uranium on the complexes followsLangmuir adsorption isotherm, and is in line with quasi-second oder kinetic equation.

关 键 词：羟基磷灰石 纳米零价铁 铀(Ⅵ) 

分 类 号：TB333[一般工业技术—材料科学与工程]