纳米Fe<sub>3</sub>O<sub>4</sub>/黑曲霉磁性微球对U(Ⅵ)的吸附性能及机制

刘金香; 熊芬; 谢水波; 刘迎九; 廖伟; 蒲亚帅

doi:10.13801/j.cnki.fhclxb.20170303.003

纳米Fe₃O₄/黑曲霉磁性微球对U(Ⅵ)的吸附性能及机制

刘金香^1,2,
熊芬¹,
谢水波^1,2,,
刘迎九^1,2,
廖伟¹,
蒲亚帅²

1.
南华大学污染控制与资源化技术湖南省高校重点实验室, 衡阳 421001;
2.
南华大学铀矿冶生物技术国防重点学科实验室, 衡阳 421001

基金项目: 国家自然科学基金（11475080）；湖南省高校创新平台开放基金（14K083）

详细信息

通讯作者:
谢水波,博士,教授,博士生导师,研究方向为环境生物技术、水处理理论与技术E-mail:xiesbmr@263.net

中图分类号: TL941.29;X771
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出版历程
- 收稿日期: 2016-12-04
- 修回日期: 2017-01-21
- 刊出日期: 2017-12-14

Adsorption characteristic and mechanism of Uranium (Ⅵ) by nano Fe₃O₄/Aspergillus niger magnetic microspheres

1.
Hu'nan Province Key Laboratory of Pollution Control and Resources Reuse Technology, University of South China, Hengyang 421001, China;
2.
Key Discipline Laboratory for National Defence for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, Hengyang 421001, China

摘要

摘要: 在Fe₃O₄中加入黑曲霉培养基混合培养制备了Fe₃O₄/黑曲霉磁性微球，通过静态吸附试验，考察了pH值、温度、吸附剂用量、接触时间及U（Ⅵ）初始浓度等因素对Fe₃O₄/黑曲霉磁性微球吸附U（Ⅵ）效果的影响。结果表明：pH值是影响Fe₃O₄/黑曲霉磁性微球去除U（Ⅵ）的重要因素。pH=4、温度为25℃、U（Ⅵ）的初始浓度为10 mg/L、Fe₃O₄/黑曲霉磁性微球投加量为1 g/L时，Fe₃O₄/黑曲霉磁性微球对U（Ⅵ）的去除率达到98.89%，在吸附15 h后趋于平衡。采用SEM、能谱分析、FTIR等手段分析了Fe₃O₄/黑曲霉磁性微球吸附U（Ⅵ）的机制。SEM-EDS结果表明，Fe₃O₄/黑曲霉磁性微球成功合成且呈网状结构；FTIR结果表明，Fe₃O₄/黑曲霉磁性微球与铀发生作用的主要基团有羟基、羧基、酰胺基等。
- Fe₃O₄ /
- 黑曲霉 /
- 磁性 /
- 铀(Ⅵ) /
- 吸附
Abstract: Fe₃O₄/aspergillus Niger were prepared by adding culturing media nanoparticles in Fe₃O₄, then the static adsorption experiment was carried out, Through a static test, different experimental parameters such as solution pH, temperature, dosing, adsorption time and initial concentration were examined to investigate their effects on adsorption of U(Ⅵ) by Fe₃O₄/Aspergillus niger. The results show that pH value can be the important factor for affecting U(Ⅵ). When solution pH=4, 25℃, dosing quantity 1 g/L, U(Ⅵ) of the initial concentration is 10 mg/L, the adsorption rate is as high as 98.89%, adsorption process is verging to be balanced after 15 h. The prepared composites were characterized by SEM, EDS and FTIR. SEM-EDS show that part of the hyphae surface was coated with tiny particles and the structure is the grid. FTIR spectra demonstrate that -OH, -C═O and -CONH interact with U(Ⅵ).
- Fe₃O₄ /
- Aspergillus niger /
- magnetism /
- Uranium (Ⅵ) /
- adsorption