期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 657, 期 -, 页码 809-817出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2015.10.178
关键词
Magnetic nanorod; Congo red; Adsorption; Mechanism
资金
- National Natural Science Funds of China [51402153]
- Nanjing Agricultural University
Magnetic Sr-5(PO4)(3)(OH)/Fe3O4 (SPF) nanorod with rough surfaces was prepared and characterized using different techniques, such as SEM, EDS, TEM, SAED, HRTEM, XRD, XPS, PPMS and FT-IR. The adsorption behavior of Congo red (CR) from aqueous solution onto the as-prepared SPF nanorod was systematically investigated. Adsorption isotherm data indicated that the adsorption of CR onto SPF was monolayer adsorption which followed well the Langmuir isotherm model. The maximal CR uptake by SPF was 396 mg/g in the test. Kinetics parameters were in accord with pseudo-second-order equation, and the maximum sorption capacity calculated was 294 mg/g, which was close to the experimental value. For thermodynamic studies, parameters such as the Gibbs free energy, the enthalpy and the entropy indicated that the adsorption process was spontaneous and exothermic in nature. The removal of CR was attributed to the hydrogen bond and ionic interactions. Moreover, SPF can be easily magnetic separated and reused. The adsorption capacity was approximately 89% of the initial saturation adsorption capacity after being used five times. (C) 2015 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据